Computer program calculates the inviscid axisymmetric nozzle expansion of propellant systems having both gaseous and condensed exhaust products. The program uses velocity and thermal lags and will perform calculations for contoured and conical nozzles

Kliegel, J. R.

Nickerson, G. R.

English

NASA Technical Reports Server

October 1968	 Brief 68-10374 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space program, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Axisymmetric Two-Phase Perfect Gas Performance Program 
The problem: 
To develop an axisymmetric method which calcu-
lates the performance of propellant systems having 
both gaseous and condensed exhaust products. 
The solution: 
A computer program which calculates the inviscid 
axisymmetric nozzle expansion of propellant systems 
having both gaseous and condensed exhaust products. 
How it's done: 
The program considers the velocity and thermal 
Jags. (for ten particle groups) between the gaseous 
and condensed combustion products (when they are 
present in the chamber). It does not consider mass 
transfer (only momentum and energy transfer) be-
tween gaseous and condensed combustion products, 
nor does it consider nonequilibrium effects of finite 
rate chemical reactions between gaseous and combus-
tion products. This program considers only the ex-
pansion of a uniform mixture (the ideal engine 
case). 
Standard explicit integration methods are used. 
The program is designed for engineering use and is
specified and programmed in a straightforward man-
ner to facilitate its use as a development tool. 
Notes: 
1. This program is written in Fortran IV for use 
on the IBM 7094 computer. 
2. This program will perform calculations for con-
toured nozzles as well as conical nozzles. 
3. Related computer programs are described in 
NASA Tech Briefs 68-10375, 68-10376, and 68-
10377. 
4. Inquiries concerning this program may be made 
to:
COSMIC 
Computer Center 
University of Georgia 
Athens, Georgia 30601 
Reference: B68-10374 
Patent status: 
No patent action is contemplated by NASA. 
Source: J. R. Kliegel and G. R. Nickerson 
of TRW Systems 
under contract to 
Manned Spacecraft Center 
(MSC-11774) 
Category 06 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
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Axisymmetric two-phase perfect gas performance program

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