Am Interactive Preprocessor for the NASA Engine Performance Program

f

/ L' _' /

NASA

Technical

Memorandum

105786 q

9

"J

/ ...... .. _:/"' _!(

Am Interactive Preprocessor for the NASA Engine Performance Program

Jeffrey J. Berton and Robert Lewis Research Center Cleveland,

August

M. Plencner

Ohio

1992

(NASA-TM-105186) PREPROCESSOR PERiFORNANCE

AN FOR THE PROGRAM

INTERACTIVE NASA ENGINE (NASA)

28

N9.3-I0983 p Unclas

G3/O/

0125223

An

Interactive

NASA

Preprocessor

Engine

Jeffrey

for

Performance

J. Berton

and

the

Program

Robert

M. Plencner

Aeropropulsion Analysis Office Aeronautics and Space Administration Lewis Research Center

National

Cleveland,

Ohio

44135

Abstract This report describes the Simplified NEPP which is written to aid in the preparation Engine

Performance

Program

Automated of input

(NEPP).

Preprocessor (SNAP), data files for the NASA

Specifically,

SNAP

package on the Virtual Machine operating system that user for input information via a series of menus. The these menus are assimilated into an input file suitable NEPP.

SNAP

report

acts

serves

description modifications

as a user-friendly

as of

an

preprocessing

introduction

the program to the soi'_ware.

to the logic,

SNAP

and

a

is

a

software

prompts the NEPP data collected from for the running of

interface software,

maintenance

for NEPP.

This

a user's

manual,

manual

for

a

future

Introduction The

NASA

Engine

thermodynamic descended

Performance

cycle the

from

Navy/NASA Engine and the enhanced been

used

turboprops from into the One

the engine

of the gas

performance

particularly input

gas its

property inputs. type

engine and

vexing

the

cycle

general

engine

design

and

steady-state program that NNEP 1, the

off-design

configurations

cycle

to assemble

problem With

files, input

NEPP array

components location

very

engines. that

ranging NEPP's

virtually

model

any the

performance from

subsonic

versatility

results

sequence

code

of components

interprets

to compute

characteristics.

requirements. map One

both

variable user

a

with chemical equilibrium analysis, NNEPEQ 2, Engine Program, NNEP893. This code has

engine

turbine

is

code. NEPP is a FORTRAN Navy/NASA Engine Program,

to predict

of Brayton

ability

its

the

Program Navy/NASA

to supersonic

a complete

connect

analysis original

extensively

of a variety

Program

into

of each

in the the

usage

exception

uses the contains a desired component

of NEPP

concerns

of component

FORTRAN NAMELIST data that enables configuration. in

the

engine

the

nature

performance

This

of and

utility to enter the program to array

flowpath.

describes Another

array

is

used

represents

to

describe

each

a component

component.

specification

whose

component type. A user, therefore, must manual for the definition of input parameters. often

prone

to errors

example

of this

In

the

1981,

aid in resulted

made

input

first

to lay

new

engine

out

attempt

the

to use.

In addition,

controls,

and

majority on the

system.

menus

is

SNAP's

philosophy

that approach

is

of SNAP

by giving SNAP, the

users user

the

can

user

layout, execute

an

input

files. This The former

component

user

display can

to

and

the

and

the

varies

attempt allows

written in because of are rather

does

machine

input

or

modify

the

check the flowpath NEPP using the

macros

and

for inputting

NEPP

use

restricted

is

viewed

thus as

an

user interface development 8.

not

is to allow

for the

a

more

data.

modify

the

layout of

logic, create newly created

the

Unix

a new input

an

programs _I

step

to

operating before

the

workstation.

commonplace

of

any

of this NEPP

A disadvantage to

in laying out an engine a series of menu screens.

specifications

really

Center run new input

interpreter

intermediate on

known

specifications.

at the NASA Lewis Research (_) operating system 5, a

editor

of a

in NEPP

component

a

component

from

options

REKONFIG

the

to

specifications

modify

input

apply

redefines

uses

as much help works through

An

preprocessor

which takes advantage of the capabilities 6 and interpreting language 7. The Simplified

customized This

components,

the

limiters;

(SNAP)

the

arrays.

exists editor

development of a graphical soi_ware is currently under The

of the

NEPP users Machine

Preprocessor

approach

on

of the Virtual

preprocessor now operating system's to generate

in a

code

but merely

array

dependent

elements

of NEPP input REKONFIG 4.

fill

of the

neither

this

continually refer to an input This is very tedious and is

developing

allows

nature

optimizers,

Automated

is

in

1. at

and

definition

the

modification KONFIG and latter

The

an engine,

Since the the code

made

position

of an existing engine. These programs are are therefore portable to most systems. However, nature of FORTRAN input, even these programs

to machine.

this

was

the

cumbersome

reconfigure

in Table

components

while

specifications FORTRAN and the restrictive

miscounting

is shown

the generation and in two programs:

user

as

by

Each

Such

usage

of NEPP

as possible. From these

engine,

component, NEPP input file directly

add draw

To use menus, or

the

delete engine

file, and finally from the SNAP

environment.

Program

Description

The

/ Output

The the

Input

Menu

Input/Output command

menu snap.

naming convention, user last loaded:

In

screen, this

shown

example,

an input file a turbine bypass

in the

Figure user

1, appears

is presented

upon with,

entering in

the

VM

called TBE INPUT1 A. This is the file the engine. SNAP remembers past encounters

with

each

user.

This

is

required, presuming the the course of a project. forthcoming

session,

Appearing the

user

will

Personal

--

A, if a file keys

modify

SNAP

of that now

according TBE

create flag

already

relay

commands

of

to the

INPUT2

at the

that

name

number

keystrokes

work on the same file during may be the basis for the

will

user's

A, which

end

of the

prevent

wishes.

is the

session.

the

file Also

overwriting

of

There

are

exists. to

the

A and create TBE INPUT2 file names may be entered

program.

a completely

function

9.

key

The

point

The

Engine

name

press will

press the Edit of the previous

menu has and writing

to the

the

Engine

Figure

Proceed the

the

Configure

New

Engine

be ignored.

Old Input session,

function press the

key 11. Error Recovery

if the user has unintentionally wishes to resume work on the

quit SNAP engine at

of exiting.

identical

The

file

engine,

key 10. This is useful saving any results and

The Input/Output non-existent files replace

new

input

To edit the input file, To recover the results

the

A, press the by overstriking

names.

To configure

function without

be

the

possibilities:

current

---

lessen

name

is a safety

To modify TBE INPUT1 function key 5. Other

--

can

is the

have

menu

function

SNAP

below

presumably

TBE INPUT2

several

which

in this

to

user would most likely This file, if selected,

immediately

appearing

intended

input

input

error-trapping to read-only

file

name.

to guard against proceeding disks. The output file name

In this

case,

the

file

SNAP

with may

create_

will

file.

Configuration

Menu

Configuration

2 is the

result

menu

is illustrated

of proceeding

with

in Figures our

sample

2 and input

3.

Shown

turbine

in

bypass

engine, while shown in Figure 3 is the result if the user had chosen to configure a new engine (SNAP always begins the session with an inlet.). In the former case, SNAP has read the file that the user intends to modify (TBE INPUT1 A) and feeds the data into the menu for editing. The component names, numbers, flow stations are configurations

and flow stations may marked by an asterisk.

larger

than

a single

be changed at this point. Undefined Paging must be used to view engine

screen.

To add or delete a component, the user makes the lei_ side of the menu. To add a component, in the Typing A

block

pressing

command del

region.

or d in the

diagram the

Draw

A blank command

of the Engine

line area

currently function

is formed deletes

9.

of the command user must type

where

data

may

may

be

area on _add or a

be entered.

a component.

configured key

use the

engine An

auxiliary

menu

obtained appears,

by as

shown

in

Figure

4,

where

the

diagram

may

be

examined

and

to the

engine,

printed,

if

desired. To abandon Quit

any

function

message

key

will

system

changes

that

3.

appear

command

In

may

the

to warn

may

have

event

the

this

user

be entered

been key

of the

in the

made is

inadvertently

impending

command

the

pressed,

exit. area

press

a

In addition,

at the

bottom

any of the

menu.

The To

Component modify

placed

Specification

the

input

anywhere

component customized

specifications

on the

and menu

the for

current

inputs

for

values

of the

inputs

values bottom

or by typing of the menu.

Menus

line

this

errors

caused

normal are

by failing

be

illustrated

The

are

Dataset

Once

available

The

the

to the Engine

the

off-design

Option menu

to input

component

until the will supply

specifications

Default

configuration

and

new

error is default

may be changed if they This helps eliminate

to non-zero

menu.

with

in the area at the to a number, an

All values

values may

for the either

component for

be

menus

all

component

component

inputs,

the

global This

user

function 22) are

character. input. menu

An auxiliary menu, shown in Figure is operated in the same manner as the

menus.

From

input

triggers

21.

appropriate

off-design cases

new

changes the

engine

Option B: Modify all of the off-design the

them

The

Dataset Creation menu by pressing the Proceed Configuration menu. Several options (see Figure

specification

these

overstriking

values job.

A of the

definitions.

is highlighted created, SNAP

input

5 through

Option A: Modify NEPP's 23, can change these data.

there,

either

be

desired

Menu

by typing

component

certain

must

of the

10 must be pressed. This menu lists all

corresponding

These intended

cursor

menu

number and its value inputs does not evaluate

component. for the

leaving

Figures

with

• may proceed key 5 in the

by

the

shown.

Creation

satisfied

their

modified

to set

upon in

specifications

key appear.

and the field has just been

of NEPP.

or ignored

function will and

specification If one of the

for that circtunstances

operation

saved

Configuration

component

may the

component,

Engine

Select Item that component

error message is posted corrected. If the component input specifications do not suit the

of any

in the

cases. that the cases

The user is sent to an editor original input file may have may

be

altered

for

later

containing contained.

reattachment

to

file.

C: Execute the flowpath appears (shown in Figure

logic checking routines. Another auxiliary 24) which contains messages concerning the

.......

..

_"

,

::

:,

flowpath's

viability.

Any

mistakes

flagged

here.

Option dataset of their

D: Edit the new (See options F and efforts. The new

made

during

input dataset. G), users may dataset must

the

engine

Upon creation wish to examine be created prior

configuring

are

of the new input or edit the product to exercising this

option. Option E: the NEPP

Run NEPP using the new dataset. execution menu appears, as shown

used

here

is the

run

(i.e.,

performance

library dataset

object must

Option of the

file just

provided

the

Option

G:

option

is the

the new the user

used during to exercising

dataset. provided

the

same

new

be

the

enter

dataset

as option

performed.

execution

same

functions

The

user

3; or, if the the Previous into To

the

facilitate

provided

and

mode,

NEPP

run.

and

The

to collect menu,

new

all the

Global Input file is identified

menu and to by the name

off-design

(Default).

except

that

cases

any

off-design

any

input

function

character, key

5

that

via option B if the user

this

also

This

cases

original input file and modified file. This is the default option;

quoted exit

the

not listed They are

option

results

in

will the

G,

respectively,

or Hollerith SNAP

in Figures

except

that

specify option

menu

where of

30.

SNAP,

a numerical

in integer

arrays.

by pressing

the

more

Quit

function

key

SNAP has created, sends the user back

modifications

flowcharts

format

the component names. on some compilers that

with the engine configuration key 7 may be pressed. This

maintenance 26 through

strings

environment

Configuration future

in the menu text due to space options H and I, which perform the

format) is used to to use the NAMELIST

user is unhappy Menu function

Engine

attach

Proceed

that are available.

as F

may

and

specifying

the

a character is necessary

do not recognize

execution

the

option.

options are also

(rather than This method

concerning

This option instructs SNAP in the Engine Configuration

F above,

without

Pressing

of this

Two other limitations

key

data,

data

menu.

may have been included in the are appended to the new data presses

all other

the previous this option.

menus, and the input file. This

Input/Output

Create

while

thermodynamic

those prior

Specification new NEPP

in the

by SNAP

maps,

files) are be created

F: Create information

Component formulate

created

When this option is selected, in Figure 25. The input file

of the

may

be made.

software

are

Concluding

Remarks

The

soi_vare

SNAP

encountered SNAP has feature

known

SNAP, SNAP not

as

written

users. SNAP

may

In addition,

any

"intelligently"

handle

is

be

run

and on

off-design

cases

that

is, the

modifiable;

the

the

SNAP and

data must Creation

be made menu.

is intended

to fill

REKONFIG

graphical

user

at a rudimentary

an

intermediate

ancestors interface.

and This

advantage of the graphics Unlike SNAP, a menu-driven interface.

SNAP,

preprocessor

and

upon

its

however,

error-trapping

a

software,

quality input is

device

wish

level

niche

currently

under

effective for NEPP

and that

fed

into The

operating

to include

are

manipulate

data at the modification

through

full-function,

VM

cannot

off-design data. Any

and speed provided preprocessor, it is an

the

software

software future

may

is

is aborted.

using

user

SNAP

frequently

engine

program

machines

the component specification identifiers of the level of sophistication as it can the design case design Dataset

problems

several areas in which complexities of a NEPP

If a multi-mode

displayed

only

most

are, however, handle the

engines.

message also

to

There cannot

multi-mode

a warning software

system.

is

by NEPP limitations.

Option

between

B in

its

Unix

same to offthe

KONFIG

workstation,

development

8, takes

by these machines. an event-driven user user-friendly

input

significantly

improves

predecessors.

•

•

_

'

!;

_

_

_

_

Acknowledgments The

authors

NASA

Lewis

suggestions Dale Hubler graphic

thank

the

Research

members Center

of the for their

for its improvement. of the NASA Lewis

images

in this

report

Aeropropulsion testing

Analysis

of the

SNAP

Office

software

of the

and

their

The authors also thank F_lix Tortes Research Center. Their advice regarding

and the

is appreciated.

References 1.

Fishbach,

L.H.;

and

2.

Program. Fishbach,

NASA L.H.;

TMX 71857, and Gordon,

3.

Navy/NASA Plencner,

Engine Program. R.M.; and Snyder,

(NNEP89)

--A

4.

Fishbach,

L.H.:

5.

Preprocessing Programs NASA TM 82636, 1981. International Business Product:

User's

Caddy,

M.J.:

Introduction.

and

NASATM

105186,

REKONFIG

-- Two

to the Navy Machines

6.

International

7.

Product: System Product Editor SC24-5220, 1984. International Business Machines Product:

System

SC24-5238, 8.

Curlett, Analysis.

NASA

Corporation: User's

Program

1991. Program

(NNEP).

Machine/System 1984.

Virtual

Guide.

of the

Interactive

GC19-6200,

User's

Interpreter

Version

Virtual

Corporation:

Engine

1988. Engine

Engine

Corporation:

Machines

Product

Chemical

NASA TM 199851, C.A.: The NavyNASA

IBM Publication

Business

The NavyNASA

1975. S.: NNEPEQ:

Manual.

KONFIG

NNEP:

MachineSystem

IBM Publication Virtual

Guide.

Machine/System

IBM Publication

1984. B.P.;

and

NASATM

Ryall,

K.: A Graphical

105696,

1992.

7

User

Interface

for

Engine

Cycle

.....

NASA

MACH

2.4 TURBINE

BYPASS

ENGINE:

TBE INPUT1

&D NCOMP=10,NOSTAT= 12,DRAW=T,NCODE=I,LONG=F,AMAC=F,MAPLOT=F, 1TERM_-0,DOUTHD=F,MAXN1T= 100,INST=0,AMINDS=2.4,ACAPT=24.00, BOAT=F,SPILL=F, &.END &D MODE=l, KONFIG( 1,1)='INLT',I,0,2,0,SPEC( 1,1)--4"0,2.4,.930,0,0,55000,0,0, 0,0,504, KONFIG(1,2)='COMP',2,0,3,10,SPEC(1,2 )= I.16 7 4,.16,1,1703,1,1704 1705,1,0,0,.8607,12.0,0.8114, KONFIG(1,3)='DUCT,3,0,12,11,SPEC(1,3)=0,0,0,0,0,0,0,0,.000001,0, KONFIG(I,4)='DUCT',I 2,0,4,13,SPEC(1,4)=0,0,0,0,0,0,0,0,.0035,0, KONFIG(1,5)='DUCT,4,0,5,0,SPEC(1,5)=.05,. 12,0,3360,1.00,18580, 0,0,0,.020,0,1, KONFIG( 1,6)='TURB',5,10,14,0, SPEC(1,6) =2,1,1,5112,1,5113,1,1, .83,1,.92,100,1, KONFIG(1,7)='DUCT,14,0,6,0,SPEC(1,7)=0,.40,0,0,0,0,0,1,0,0, KONFIG(1,8)='DUCT,6,11,7,0,SPEC(1,8)=0,0,0,0,0,0,0,1,0,0, KONFIG(1,9)='DUCT,7,0,8,0,SPEC(1,9)=.000,0,0,0,1,18400, KONFIG( 1,10)--'NOZZ',8,0,9,0,SPEC( 1,10)=0,1,0,0,.985,1,1,0,1, KONFIG(I,11)='SI-IFT,2,6,12,0,SPEC(I,11)=1.0310,1,1,1,1,1,1,1,1, KONFIG(I,12)---'LOAD',SPEC(1,12)--200, KONFIG(1,13)='CNTL',SPCNTL(1,13)=.I,2,'STAP',8,2,0,0, KONFIG(1,14)='CNTL',SPCNTL(1,14)=l,6,'STAP',8,5,0,0, KONFIG(1,15)='CNTL',SPCNTL(1,15)= 1,11,'DOUT,8,11,0,0, KONFIG(1,16)='CNTL',SPCNTL(1,16)=9,3,'DOUT',5,2,20,0, KONFIG(1,17)='CNTL',SPCNTL(1,17)--4,5,'PERF,4,0,80000,0,100,3360, KONFIG(1,18)='CNTL',SPCNTL(I,18)--9,3,'STAP',I,ll,0.000001,0, KONFIG(1,19)='CNTL',SPCNTL(1,19)=9,4,'STAP',l,13,1,1, KONFIG(I,20)='CNTL',SPCNTL(1,20)=3,28,'DOUT',7,7,.500,0, KONFIG( 1,21 )='CNTL',SPCNTL(1,21)= 13,2,'SWAP',3,3,1760.,1, KONFIG(1,26)='SKED',7,7,7,0,SPEC( 1,26)= 1,1,1,1110,17,1,13,1, KONFIG(1,27)='SKED',l,l,0,0,SPEC(1,27)= 1,6,1,7070,25,1, KONFIG(I,28)='SKED',l,l,0,0,SPEC(1,28)=I,14,1,7140,25,1, KONFIG(1,29)='CNTL',SPCNTL(I,29)=l,2,'DOUT',5,2,20.,1, KONFIG(1,30)='CNTL',SPCNTL(1,30)=8,10,'DOUT,4,10,1300,0, &END

Table

1: Sample

NEPP Input

File

,1,

A .....

SNAP Execution SimpliFied

NEPP Automated

Menu

Preprocessor

(Version

2.0)

Purpose: This program will reconfigure a new input dataset according From the Following series of

an existing NEPP input to user specifications. menus.

dataset or All data

configure are taken

File Information: Input > Output>

Filename.: _BE Filename: TBE

Filetype: Filetype:

Overwrite

Previous

Output?

(Y/N):

PF KEYS:

lffi Help (SNAP) 9= Configure New Engine

Figure

IHI_TI INIqITZ

Filemode: Filemode:

A A

Y

1:

3= Quit SNAP 10= Error Recovery

Input/Output

5= Proceed 11 ffi Edit Old

Input

Menu

snap NEPP Engine File: TBE Add/ Oel mmamamm

=ffiw= _ =--=-ffi= ===== ===== _=--'=-= _fffi== =mr= ..... ..... _m_ ===== ===== ===== ===== PFi(_/S: 6= Auto

Configuration INNTrl

Component Number

Componont Name

Upstream (Primary)

mmammmmmmmmm

mmmmmmmmm_m

mmmmmmmmamm

1 2 3 4 5 6 7 8 9 I0 11 12 13 14 1= Help Controls

A

Flowstation (Secondary)

Uotmstream (Primary)

mmmmamm_mmmmalm

mmmmmmmmm

Flowstation (Secondary) mmmmmlmmmammm

INLT 1 ** 2 ** COHP 2 ** 3 10 DUCT 3 ** 12 11 DUCT 12 *_ 4 13 DUCT 4 ** 5 ** TURB 5 10 14 ** DUCT 14 ** 6 *_ DUCT 6 ll 7 *_ DUCT 7 ** 8 ** NOZZ 8 ** 9 ** SHFT 2 6 12 ** LOAD ** ** ** ** CNTL ** ** ** ** CNTL ** ** ** ** 2= Update 3= Quit (No Changes) 4= Tab 5= Proceed (Update) 7-- Backward 8= Forward 9ffi ]raw Engine 10= Select Item SNAP Engine

Layout

Menu i

i

Figure

2:

Engine

Configuration

Menu

for

an

Existing

Engine

NEFP Engine File: TBE Add/ gel

Component Number mmm

mmmmmmm

=mm

_

mmma mmm

Component Name _m

am

Configuration INPUT2 k Bovmstream (Primary)

Upstream Flowstation (Primary) (Secondary) mm mmm ma

ammmm

mm

_

_m

m mmm

m m_

m mm

mm

_ mmmm

2

IHLT

1

m mmm_

Flowstation (Secondary) mmmm mmmm

*_

=m_nll =lm_ll= =_=

=ran= ==lllgnl=

mnnu== ;nm==m

==mann

PH(EYS: l= Help 6= Auto Controls

2= Update 3- quit (No Changes) 4=Tab 5 = Proceed (Update) 7= Backward 8= Forward 9= Draw Engine 10= Select Item

=_---->

SI_P Engine Layout Henu

I

m

Figure

3: Engine

Configuration

Menu

for a New

Engine

snnp

....

Current

D



5=Bottom

Figure

Engine

7=Backward

4: Engine



Print mm

INLET Recon£iguration Spec

VaIue

1 2 3 4 5 6

100.0000000 0.000000000 0.000000000 0.000000000 0.000000000 0.950000000

7

0.000000000

S 9 10 11 L2 13 14 15

0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000

Specification

Description

Inlet Airflow (lb/s) Freestream Static Temperature .(R) Freestream Static Pressure (psia) Inlet Drag Table Number Inlet Much Number Inlet Recovery or Table Maximum Flow Allowed in Scale Factor on Recovery Geometric Altitude (ft) Undefined If Spec Ii is Non-Zero, Temperature to be Added Undefined Corrected Flow at Inlet Corrected Flow at Inlet Spec Number: 0

Usage Note: Enter PF KEYS: lfHelp

Menu

(if

blank,

I 2 3 4 5 6

O.000000000 0.000000000 O. 000000000 0.000000000 O. 000000000 0.000000000

7

O. 000000000

S 9 10 11

O.000000000 O. 000000000 O.000000000 0.000000000

12

O. 000000000

13

0.000000000

14 15

O. 000000000 O. 000000000

Spec Spec

9 < O) 9 < O)

drag

is

computed)

Spec 9 is Geopotential Altitude to That of Standard Atmosphere (R) Exit (Overrides Spec i and Spec 15) Entrance (Overrides Spec I)

Spec Value:

new values above or overstrike values in the second column. 3=Quit (No Changes to INLT) 5=Proceed (Update INLT)

DUCT Reconfiguratlon Value

if if

Number (if zero, Hil Spec is used) Recovery Table (If Spec g is used) Table Flow (If Spec 6 is used) (Used if Spec 2 and Spec 3 are O)

Figure 5: Inlet Reconfiguration

Spec

(Used (Used

Specification

Menu

Henu

Description

Total Pressure Drop (Delta P over P) or Table Number Design Mach Number (Optional. IF input, Spec Z calculated) Additional Pressure Drop Over Burner Referred Flow Squared If Burner, Exit Temp (R}; if Duct, Blank; if Negative, f/a Burner EFficiency or Table Number; if Duct, blank Fuel Heating Value (BTUIIb) or Table Number; if Duct, Blank Cross Sectional Area of Duct or Burner (in2) Entrance Bleed Flow to Total Flow Ratio (Duct only) Exit Bleed Flow to Total Flow Ratio Fraction of Air not Heated (For ICEC=I) IF 0, Find Lean F/a; if I, Stoich; if 2, Rich If I, Calculate Emissions Index If > O, Set Spec 4 to TJMI+I if Spec 4 < TJMI Undefined Undefined Spec

Number: 0

Usage Note: Enter new values 3=Quit PF KEYS: 1=Help

Figure

Spec

Value:

above or overstrike values in the second column. (No Changes to DUCT) 5=Proceed (Update DUCT)

6: Duct

Reconfiguration 11

Menu

WATER INJECTOR Spec

Value

_m

_mmm

Reconfiguration

Specification

t 2 3 4 5 6 7 8 9 10

0.000000000 0.800000000 0.000000000 1o000000000 0°000000000 0.000000000 0.000000000 0.000000000 0.000000000 0_000000000

11 12

0°000000000 0.000000000

13 t4 15

0.000000000 0.000000000 0.000000000

Descrlptlon

Water to Air Mass Flow Ratio Fraction of Water Vaporized Total Pressure Drop (Delta P Over P) Saturation Switch (If zero, use Spec I; if Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Unde fined Unde fined Undefined Spec

Usage Note: Enter PF KEYS: 1=Help

Figure

Number:

new values 3=Quit

0

Spec

above or overstrike (No Changes to _INJ)

7: Water

Injector

Specification

Value

1

1800.000000

2 3 4 5 6 7 8 9 10

1.000000000 588.0000000 5.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000

11

0.000000000

12 13

0.000000000 0.000000000

14

0.000000000

15

0.000000000

values

Reconfiguration

in the 5=Proceed

second column. (Update WINJ)

Menu

Menu

Description

Exit Temperature (R) Fuel/Oxidant Mass Ratio (Default 0,3) Generator Pressure (psia) Fuel Flow Rate (lb/s) (If used, define Spec 1 or 2) Oxidant Flow Rate (lb/s) (If used, define Spec 1, 2 or Fraction of Fuel not Included in SFC Calculations Fraction of Oxidant not Included in SFC Calculations Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Spec

Number:

Usage Note: Enter new values 3=quit PF KEYS: 1=Help

Figure

I, saturated)

Value:

GAS GENERATORReconfiguration Spec

Menu

8:

Gas

0

Spec

Value:

above or overstrike values in the (No Changes to GASG) 5=Proceed

Generator

Reconfiguration 12

4)

Menu

second column. (Update GASG)

CONPRESSOR Reconfiguration Spec

Value

1 2 3 4 5 6 7 8 9 10 11

1.300000000 0.000000000 1.000000000 1004.000000 1.000000000 1005.000000 1.000000000 1006.000000 1.000000000 0.000000000 0.000000000

12

0.850000000

13

5.000000000

14 15

0.985000000 0.000000000

Specification

Henu

Description

R Value Used to Read Tables Compressor Bleed Flow to Total Flow Ratio Scale Factor on Corrected Speed Corrected Weight Flow or Table Number Scale Factor on Corrected Height Flow Compressor Adiabatic Efficiency or Scale Factor on Adiabatic Efficiency

I

Number:

new values 3-Quit

Usage Note: Enter PF KEYS: 1=Help

Figure

9:

0

Spec

Value ------

above or overstrike values in the (No Changes to CONP) 5=Proceed

CompressorReconfiguration

1

Specification

2 3 4 5 6 7 S 9 10

0.000000000 1.000000000 1007.000000 1.000000000 1008.000000 1.000000000 1.000000000 0.000000000 1.000000000

11 12 13 14

0.900000000 5000.000000 1.000000000 0.000000000

15

0.000000000

Speed

second column. (Update COMP)

Menu

Nenu

Description

Pressure Ratio at Design Point on Naps Total Bleed In to Total Bleed Available Ratio Scale Factor on Corrected Speed Corrected Nelght Flow or Table Number Scale Factor on Corrected Height Flow Turbine Adiabatic Efficiency or Table Number Scale Factor on Adiabatic Efficiency Scale Factor on Pressure Ratio Turbine Entrance Bleed Flow to Total Bleed Flow Third Dimensional Argument Value on Map Desired Adiabatic Efficiency at Design Point

3.500000000

Bleed

Value:

TURBINE Reconfiguration

--m

Number

Compressor Pressure Ratio or Table Number Scale Factor on Pressure Ratio Third Dimensional Argument Value on Nap Fractional Bleed Horsepower Loss Due to Interstage Desired Adiabatic Efficiency at Design Point Desired Pressure Ratio at Design R and Corrected Corrected Speed for Design Point on Naps Undefined Spec

Spec

Table

Ratio

Corrected Speed at Design Point on Map Turbine Horsepower Split (For CALBLD-T} Factor for Cooling Type per NASA TM 81453 (For CALBLD=T} Number of Turbine Stages Spec

Usage Note: Enter PF KEYS: 1=Help

Number:

new values 3=Quit

0

Spec

Value:

above or overstrike (No Changes to TURB)

Figure 10: Turbine

values

Reconfiguration 13

in the second column. 5=Proceed (Update TURB)

Menu

HEAT EXCHANGER Reconfiguration Specification

Spec

Value

1 2 3 4 5 6 7 8 9 10

0.000000000 0.000000000 100.0000000 0.700000000 1.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000

11 12 13

0.000000000 0.000000000 0.000000000

14 15

0.000000000 0.000000000

Description

Main Total Pressure Drop (Delta P over P) or Table Number Secondary Total Pressure Drop (Delta P over P) or Table Guess Value Temperature Rise (R) Effectiveness or Table Number Scale Factor on Effectiveness Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Spec hen

Usage Note: Enter PF KEYS: 1=Help

Figure

Number: values 3=Quit

11:

Heat

_

Spec

Value:

above or overstrike values in the (No Changes to HTEX) 5=Proceed

Exchanger

Reconfiguration

SPLITTER Reconfiguration Spec

Value

1 2 3 4 5 6

2.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000

7 8 9 10 11 12

0°000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000

13

0.000000000

14 15

0.000000000 0.000000000

Menu

Specification Bypass Ratio _ain Stream Total Secondary Stream Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Spec

Usage Note: Enter PF KEYS: 1=Help

Number:

new values 3=Quit

Figure

12:

_

Menu

Menu

Description

Pressure Drop Total Pressure

Spec

Reconfiguration 14

(Delta P over P) Drop (Delta P over

P)

Value:

above or overstrike (No Changes to SPLT)

Splitter

second column. (Update HTEX)

values

in the 5=Proceed

Menu

second column. (Update SPLT)

MIXER ReconFiguration

Spec

Value

1 2 3 4 5 6 7 S 9 10 11

0.000000000 0.000000000 0.300000000 0.950000000 1.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000

12 13 14

0.000000000 0.000000000 0.000000000

15

0.000000000

SpeciFication

Menu

Description

Main Flo. Inlet Area Calculated at Design Point (Ft2) Secondary Flow Inlet Area Calculated at Design Point (ft2) If > 1, Total to Static Pressure Ratio; If < 1, Design Mach Momentum Coefficient For Mixer Exit Stream If i, Total Inlet Area Fixed; IF O, Independent Areas If 1, Spec 3 is Min PR or Min Mach Number of Either Stream IF O, Subsonic Mixer; If 1, Supersonic Mixer; If 2, Ejector If O, Subsonic Solution; If I, Supersonic Solution If Spec 7 > O, Design Ejector Primary Mach Number Mixer Area Ratio Injection Angle (Deg) Factor Used to Check For Overexpansion Momentum Coefficient of JMI Stream Momentum CoeFFicient of JM2 Stream Undefined Spec

Number: 0

Usage Note: Enter new values 3=Quit PF KEYS: l-Help

Figure

13:

Spec

Value

1

0.000000000

2 3 4

1.000000000 0.000000000 0.000000000

5

0.990000000

6 7 8 9 10

0.000000000 1.000000000 0.000000000 1.000000000 0.000000000

11 12 13 14

0.000000000 0.000000000 0.000000000 0.000000000

15

0.000000000

above or overstrike values in the (No Changes to MIXR) 5=Proceed

Mixer

Specification

Reconfiguration

second column. (Update MIXR)

Menu

Menu

Description

Flow Area (in2); Exit For Convergent, Throat For C-D Flow Discharge Coefficient or Table Number Exit Static Pressure (psla) (if Different Than Ambient) Ambient Static Pressure (psia) (If zero see Spec 9) Velocity CoefFicient or Table Number Nozzle Switch: if O, Convergent; if I, 2, 3; C-D Area Switch: if O, Fix Throat; if I, Vary to Match Flow Exit to Throat Area Ratio {for Type 3 Nozzles) If Spec 4 is Zero, Set Spec 9 to Inlet Component Number Divergence Half Angle (Deg) (For Divergence Calculations) Divergent Axial Length (in) (For Divergence Calculations) Nozzle Switch For Divergence Calculations (See Manual) Undefined Undefined Undefined Spec

Usage Note: Enter PF KEYS: lfHelp

Ejector

Value:

NOZZLE Reconfiguration Spec

of

Number: 0

Spec

Value:

new values above or overstrike values in the second column. 3ffiQuit(No Changes to NOZZ) 5=Proceed (Update NOZZ)

Figure

14:

Nozzle

Reconfiguration 15

Menu

snap LOAD Reconfigurution Specification

Spec

Value

1 2 3 4 5 6 7 S P iO

0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000 0.000000000

11 12 13 14 15

0.000000000 0.000000000 0.000000000 0.000000000 0.000000000

|

Note:

PF KEYS:

Enter l=Help

Description

Load HorsepoNer (Negative) or Table Number Propeller EFt or tab, ref. no. (If no propeller, Thrust to Specific Horsepower Ratio (Sea Level Design point power loading (SHP/D*D) Design point tip speed, ft/s Undefined Undefined Scaling factor on thrust and efficiency Desired design point propeller efficiency Undefined Unde fined Uncle fined Uude fined Undefined Undefined Spec

Usage

Menu

Number:

new values 3=Qult

Figure

15:

_

Spec

above (No

or

Load

O)

Value:

overstrike

Changes

enter Static)

to

values

LOAD)

Reconfiguration

in

the

5=Proceed

second (Update

column. LOAD)

Menu

snap

SHAFT Reconfiguration Spec

Value

1 2

1000.000000 1.000000000

3 4

1.000000000 1.000000000

5

1.000000000

Specification

Description

Actual Shaft RF8 Gear Ratio to First Attachment (Component to Second Attachment (Component +Gear Ratio to Third Attachment (Component Gear Ratio (Component Gear Ratio to Fourth Attachment Efficiency of First Attachment Mechanical Efficiency of Second Attachment Mechomical Efficiency of Third Attachment Mechanical Efficiency of Fourth Attachment Mechanical

6 7 S 9 10 11 12

1.000000000 1.000000000 1.000000000 1.000000000 0.000000000 0.000000000 0.000000000

13

0.000000000

Undefined

14 15

0.000000000 0.000000000

Undefined Undefined

gPM/Shaft RPM/Shaft gPH/Shaft RPH/Shaft (HP/Ideal (HP/Ideal (HP/Ideal (HP/Ideal

RPN) RPH) gPN) RPN) HP) HP) HP) HP)

Undefined Undefined Undefined

Spec Usage Note: Enter PF KEYS: l=Help

Menu

Number: 0

new values 3=Ouit

Figure

16:

Spec

Value:

above or overstrike values in the (No Changes to SHFT) 5=Proceed

Shaft

Reconfiguration 16

Menu

second column. (Update SHFT)

snap CONTROLReconfiguration Vary

of

INLT i so that

Net

Thrust

equals

Component to be varied is: Independent variable is: Hinimum allowable value: Maximum allowable value:

Dependent

Independent

Dependent

i 2 3 4 5 6 7 8 9

|

Airflow

Menu

Variables

Airflow Total Temp Total Press Drag Table Mach Number Recovery Max Table FloN Scale Factor Altitude

PF KEYS:

i 2 3 4 5 6 7 8 9

iO Fuel/Air Delta Temp ****** Exit Corr Flo Ent Corr Flow

3_Quit

l=Help

(No Changes

OPTIMAL 2 0.0002000 0.0000000 0.0000000

Spec

Value

1 2 3 4 5 6 7 8 9

0.000000000 0. 000000000 O. 000000000 0.000000000 0.000000000 O.000000000 0.000000000 0.000000000 O. 000000000

Figure

type is _E]IF

to CNTL)

Reconfiguration

(PERFs) I0 ii 12 13

Installed TSFC Inlet Drag Boattail Drag ******

14 **_*_ 15

Cooling

5=Proceed

SPEC

(Update CNTL)

Menu

Menu

Number of Component Having Independent Varlable Criteria of Convergence on Dependent Variable Component Number Containing the Dependent Variable For NJOPT=OwPERF PROPTY which is Depend. Var.>OHin,O--No. of DATOUT for NJOPT Indic Dependent Var. Specification Blank Minimum Allowable Maximum Allowable SPEC of Component Blank Blank Blank Blank Switch to Turn ON Spec

Usage Note: Enter PF KEYS: l=Help

VARIABLE

variables

Total Airflow Gross Thrust Fuel FloN Net Thrust TSFC Fnet/Airflow Inlet Drag Total SHP Installed Fnet

Figure 17: Control Reconfiguration

NC TOLOPT NJOPT NVOPT

variable

PerF. property sought is: 4 Desired value is: 20000.00000 Control is: 0FF Tolerance= 0

(SPECs)

12 13 14 15

20000.00000

Number:

new values 3=Quit

18:

0

Description

Value of the Variable Value of the Variable NC which is the Independent

Variable

(=I) or OFF (=0) this Variable Spec

Value:

above or overstrike values in the second column. (No Changes to OPIT) 5=Proceed (Update OPTV)

Optimal

Variable Reconfiguration 17

Menu

LIMITING VABIABLEReconFiguration Spec

Value

1 20. 3 4 5 6 7 8 9 10 11 12 13 14 t5

O. 000000000 000000000 O.000000000 SlAP 1. 000000000 1.000000000 O. 000000000 0.000000000 O. 000000000 O. 000000000 O. 000000000 O. 000000000 O. 000000000 O.000000000 0.000000000

SpeciFication

Menu

Description

Blank Minimum alloNable value Maximum allowable value DOUT or STAr or PERF The number of the desired DOUT, STAP, or PERF Component Number or Station Number or Blank Blank Blank Switch to turn ON (=1) or OFF (=0) this limit Blank Blank Blank Blank Blank Blank Spec

Number: 0

Spec

Value:

values in the second column. Usage Note: Enter new values above or overstrike 3=Quit (No Changes to LINV) 5=Proceed (Update LIMV) PF KEYS: lfHelp

Figure

19:

Limiting

Variable

Reconiiguration

SCHEDULEReconfiguration NC V[ V2 V3 Spec 1 2 3 4 5 6 7 8 9 10

1 _ 2 _

Henu

Component Number with dependent (scheduled) Flow Station or Component Number containing Flow Station or Component Number containing Flow Station or Component Number containing SpeciFication

Value 0.000000000 0.000000000 1.000000000 0.000000000 0.000000000 1.000000000 0.000000000 1.000000000 0.000000000 1.000000000

Menu

variable X on the Nap Y on the Nap g on the Hap

Description

0=OFF, 1=ON Dependent variable (SPEC number o£ NC) Scale Factor on dependent value (FXYZ) Table (NAP) number containing FX_VZ= F(X, Y, Z) Definition of X variable (1-8,STAr 11-19,DOUT 21-35,SPEC) Scale Factor on Spec 5 Definition of Y variable on Map Scale Factor on Spec 7 Definition of Z variable on Map Scale Factor on Spec 9 Spec Number:

Usage Note: Enter PF KEYS: 1=Help

new values 3=Ouit

Figure

20:

0

Spec Value:

above or overstrike values in the second column. (No Changes to SKED) 5=Proceed (Update SKED)

Schedule

Reconfiguration 18

Menu

CONDITIONAL CONTROL ReconFiguration Activate

CNTL I when

Trigger Variable Station Property Flow station is Trigger

value

Trigger 1 2 3 4 5 6 7 $

Weight

Flow

Type is Number is

is

o£

t exceeds

Of Control is off l=on when > than -l=on when < than

i00

--ON--

trigger trigger

• 1

value value

(STAPs) 0=Do not rest CNTL to original l=Reset CNTL to original state

Weight Flow P Total T Total f/a Corr Airflow Mach Number P Static Flow Error

PF KEYS:

station

CNTL Number to be controlled Desired TOL on above CNTL

_AP 1 1 100

Variables

Flow

Menu

0=Change CNTL setting lffiVary CNTL setting

only Freely

0=Do not reset CNTL indep l=Reset CNTL independent

3=Quit

1=Help

Figure

21:

(No Changes

Conditional

to

Control

New Dataset

Reconfiguration

snap Creation

0

once

0 variable variable

5=Proceed

VCNT)

state

(Update

0

VCNT)

Menu

Menu

Options

A B C D E F G

Modify Modify

Preliminary Off-Design

PF KEYS:

1=Help

Figure

Input any)"

Verify Flowpath Logic Edit Your New Dataset Run NEPP Using Create the New Create the NeH and Attach any

Select Option

|

Namelist Cases (if

3=Quit

22:

New Dataset Dataset Oataset Off-Deslgn

(Default)

==> 0

5=Proceed

SNAP

NEPP

Cases

Input 19

File

Creation

7=Previous

Menu

menu

m

NEPP Global Value 0 0 r 2.7 F F 0 F F 10000 0

Name ACAPT ACTL AMAC AMINDS BOAT CALBLD DEBUG DOUTHD DRAW ELIFE ENDIT

Default

Namelist

Input

Value

Name

0 0 F 2.7 F F 0 F F tO000 0

O F T F 50 1 1 1 F 0 1

ZO

0 F T F 50 I I I F 0 I 20 0

0

ICEC

0

F

INLTDS

F

0

IWT LABEL LONG MAPLOT MAXNIT MODESN NCASE NCODE NEWEFF NJOPT NMODES NUMLIN NVOPT

0

INST

0

T

PINPUT

T

0 0 1

ITERM ITPRT IWAY

0 0 I

F T 1

PLOT PUNT SIZINL

F T I

Usage Note: Overstrike PF KEYS: l=Help

Value

Default

F 0 T 530 .0002 1985 1985

existing values with your 3=Quit (No Chanffes)

Figure

23:

Global Input

Name

Default

SPILL SPLDES TABLES TFUEL TOLOPT YEARB YEARV

F 0 T 530 .0002 1985 1985

selections. 5=Proceed

(Update)

Menu

_nap

.....

Flowpath

Check _essapge

Screen

D

FLOWPATH LOGIC CHECKING MESSAGES: (IF NO MESSAGES APPEAR BELOW, FLOWPATH

PFI(EYS:

3=Quit

4=Top

Figure

5=Bottom

24:

7=Backward

Flowpath

$=Forward

Logic 20

IS CORRECT)

Check

9=Print

Screen

lO=Local

Print

NEPP Exe©utio_ Henu

SNAP

FILES: Input fn: _DE ft: IN_2 Naps fn: TEST Ft: NAPS Thermo fn: SNALL Ft: TOI_ Output fn: NEPP _t: m]T_ Instal Nap fn: ft: Rename Output filename to Input filename? Overwrite Previous Output? (Y/N): ¥ Execution Rode: C T Time share C Cray UNICOS

RUNFILE

Ai

fm: A fm: O Pm: fm: A fm: (Y/N}: N

B VMBatch (reader) P VHBatch (printer) B Debug

Libraries to be loaded: • (e.g., NATE89 and INSTAL89) LIBI: LIB2: LIB3: Notes: ATTENTIONSNAP USERS: TBE MAIN INPUT FILE USED H_E IS THE FILE SNAP 31JST CKEATEB. TIlE OTliEKFILE SPECIFICATIONS ARE TAKENFROMYOURSTANDARDNEPP DEFAULTSFILE.

I

PF KEYS:

laHe_p

3=Quit

Figure

5-Run

25:

NEPP

11=Edit

Naln

Execution

21

Input

Menu

12-Edit

Maps Input

I

SNAP;xec

I

(See Figure 27) RCFTRAN Exec RCFLOGO Xedit (See Figure 28)

"I

Ii

(I}

t',,,3 ++

©

I= 0, 339, 222 I

(See FigureXedt 29) RCFLAOUT

I =1

I

I

C°mp°nentXedit

I =555

I

I

1=333, 999

RCFBUILD (see FigureXedit 3°) '1

I

Exit

t --

(I}

> _-3

I--_

IT set I/

set I/

I--9 set

II

I:,o set I

I

Set / /

Set I

1 1 p.coo p"_o°Dl I"%°° 1 IT._._oOO I I I I I

RANCODE I lrRANCODE I

/

= 333

I

I/

= 555

I

....

_-,,0,,,i IRoFFK,,,, ×ed, I

I I (RCFLOGO RCFLOGOXedit DEFAULTS A) / I

I

!

Call INITIALIZEXEDIT

I

I Ca,INITIALIZEVARIABLES

I

I Call SETU_.ScREEN

3 PIF1

1

plF

I

I

_F_1

Proceed to I

"'"I--'"

I

I New Input I P. I .

I _° I

I_ llOr

t

t

_!!!t

t,a Lo

Call BACKUPINPUT

--Rea;lnput Write SNAP NUMBERS FiI--'T_'--,A

(Fortran Call NNEPREAD Program)

I

I Call SUBMITFILES

i

I

I

I

ZZ[ZZ, I RCFTRAN

I

File I

Recovery

SNAP Using NUiMBERS Existing A

P I SNAP NUMBERS A I

Exec

NaSmeetlUsPt Call INTDEFLT I#let_;lults

,' s_,ul.ow i

Set TRANCODE=O --

I

Input Error

I

t

Set TRANCODE=O

I t

I

RCFTRANExec

File

[

RCFTRAN Exec

Get value of TRANCODE Get value of Component Name

.op. o

= 333 I =339 RCFLAOUT Xedit (JUNK NUMBERS A)

= 555 I Ref°rmat

I

I JUNK NUMBERS rase

AI

o0

RCFBUILD Xedi! (MY JUNK FILE A) I

5" =,

I RCFLAOUT

Xedit I

RCFLAOUT Xedit (Snap Numbers A) Headers Get Defaults for New Input File

°°

I =2

i

t Set I RANCODE I = 222

o I

I

I--3 LOUTEXEC (Exit Routine)

Return to RCFTRAN Exec I

1_-5

iI

_e, I I =ss5 I

1_-7

I

ITRANCODEI I Page Back I

I

L

File SNAP NUMBERS A

--8

I--9

I--lo

I _0oIILOOT I cll I (o,a.)I .ou_×_c

RANCODEI = 999 I

Forward

J

I I

Run

Retum to RCFTRAN Exec Set TRANCODE = 333 =0

I

I

Get Component Name and Number from Current Une

RCFTRAN

= 339 Write Quitting Message File JUNK NUMBERS A

I Return to RCFTRAN Exec

Retum to

I

I

RCFTRAN E×ec I

I

Set

7

i

I Returnto 'i

Exitcounter=l

o

Code

I

I

DRAWENG I Fortran I o I:1

1=15

_e' /

ExecI

¢o oo

I J

No

:__.'

Set

1--7

ITRANCIODE

= 01

C_

,

set =9991

I IRCFTRANExecI Retum to

IrRANCODE t_

a¸

Return to RCFTRAN Exec ]

='A

=B

=C

RCFINIT Xedit (SNAP INITIAL A)

=D

Verify Flow )ath Logic

= E

Blank

:o

=F

Set

Run NEPP

Modify Inilial NAMELIST Variables

I--Hi:, =I

VAXOUT= T..!

m

m

Xedit SNAP OFFDZINE

A

Xedit New Data File if it Exists

Set ATTACHDZINE =T

.,_,.J Go To RCFFMK Exec

I

Se,_

ATTACH[) =T

REPORT Public

reporting

gathering

and

collection

of

Davis

burden

for

maintaining

Highway,

collection data

1204,

of

and

suggestions

Arlington,

USE ONLY

information

needed,

including

Suite

1. AGENCY

this the

information,

DOCUMENTATION is

VA

estimated

completing for

and

to

average

reviewing

this

22202-4302,

(Leave blank)

to

and

reducing

the

to

Office

2. REPORT

t

the

burden,

An

hour

per

coUection

of

response,

of

Washington

including

information.

Management

and

the

Send

Headquarters Budget,

time

for

comments

Services,

DATE

reviewing

Paperwork

for

Reduction

AND

1992

searching

burden

for

the

NASA

Engine

Performance

or and

(0704-0188),

any

data

other

Reports,

Washington,

sources,

aspect 1215

DC

of

this

Jefferson

20503.

DATES COVERED Memorandum

5. FUNDING

Preprocessor

existing

estimate

Operations

Technical

AND SUBTITLE Interactive

this

information Project

TYPE

Approved No. 0704-0188

instructions,

regarding

Directorate

3. REPORT

August 4. TITLE

Form OMB

PAGE

NUMBERS

Program

WU-505-69-50 6. AUTHOR(S) Jeffrey

J.

Berton

7. PERFORMING

National

and

Robert

ORGANIZATION

Aeronautics

Lewis

E-7216

12a.

SUPPLEMENTARY

and

ABSTRACT

Robert

acts

software, the

105786

M.

Plencner,

Lewis

Research

Center,

Cleveland,

Ohio.

Responsible

person,

Jeffrey

J.

12b.

STATEMENT

DISTRIBUTION

CODE

the

for

Virtual

data as

the files

the

manual,

NEPP

NASA

Machine

collected

a user-friendly

a user's

Simplified

Automated

Engine

operating

from

these

system

menus

preprocessing a description

Preprocessor

Performance

are

that

the

prompts

assimilated

interface of

(SNAP),

Program

for

program

the into

NEPP. logic,

which

(NEPP). NEPP

an This

and

input report

is written

Specifically, user file

for

serves

a maintenance

input

suitable

for as

an

manual

to aid

in the

prepara-

SNAP

is a software

information

via

the

running

introduction for

a series

of

to the

future

of

NEPP. SNAP

modifications

to

software.

SUBJECT User

data

The

SNAP

TM-

200 words)

describes

input on

menus.

NASA

07

(Maximum

report

package

Administration

- Unlimited Category

of

SPONSORING/MONITORING AGENCY REPORTNUMBER

433-7031.

DISTRIBUTION/AVAILABILITY

tion

Space

10.

AND ADDRESS(ES)

NOTES

(216)

This

NAMES(S)

20546-0001

J. Berton

Subject

14.

and

D.C.

Unclassified

13.

AGENCY

Aeronautics

Washington,

Berton,

Administration

44135-3191

9. SPONSORING/MONITORING

Jeffrey

Space

8. PERFORMING ORGANIZATION REPORT NUMBER

AND ADDRESS(ES)

Center

Ohio

National

Plencner

NAME(S)

and

Research

Cleveland,

11.

M.

15.

TERMS

manual;

.let

propulsion;

Air

breathing

NUMBER

OF PAGES

28

engines 16.

PRICE

CODE

A03 17.

SECURITY CLASSIFICATION OF REPORT Unclassified

NSN

7540-01-280-5500

18.

SECURITY CLASSIFICATION OF THIS PAGE Unclassified

19. SECURITY CLASSIFICATION OF ABSTRACT

20.

LIMITATION

OF ABSTRACT

Unclassified Standard Prescribed 298-102

Form 298 (Rev. 2-89) by ANSI Std. Z39-18