Mathematical techniques analyze fluid flow through circular duct, enlarged or constricted circular duct, and across an orifice or nozzle. Using subsonic Mach number as basic flow parameter, a series of working graphs displays the variation of various physical parameters in each of the flow conditions

Beimgraben, H. W.

English

NASA Technical Reports Server

September 1970	 Brief 70-10225 
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NASA TECH BRIEF 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage commercial 
application. Tech Briefs are available on a subscription basis from the Clearinghouse for Federal Scientific and Technical 
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be directed to the Technology Utilization Division, NASA, Code UT, Washington, D.C. 20546. 
Simplified Computation of Compressible Fluid Flow Parameters 
.
A mathematical approach has been formulated 
that yields solutions to three typical problems in 
compressible fluid flow: through a circular duct, 
through an enlarged or constricted circular duct, and 
across an orifice or nozzle. Each condition is analyzed 
separately. The techniques developed may be used in 
the study and design of fluid systems. 
The document referenced under Note (TSP70-
10225) can be used as an engineering handbook for 
the analysis of subsonic, compressible fluid flow under 
any of the three stated conditions. Using the subsonic 
Mach number as the basic flow parameter, a series of 
working graphs is presented that displays the variation 
of various physical parameters in each of the flow con-
ditions. Graphs are also plotted from experimental 
data to substantiate some of the derivations.
Several example problems and step-by-step solu-
tions are included to illustrate the use of the graphs 
in solving specific problems in fluid flow. 
Note: 
Requests for further information may be directed to: 
Technology Utilization Officer 
Kennedy Space Center 
Kennedy Space Center, Florida 32899 
Reference: TSP70-10225 
Patent status: 
No patent action is contemplated by NASA. 
Source: H. W. Beimgraben of 
The Boeing Co. 
under contract to 
Kennedy Space Center 
(K SC- 10400) 
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
Governmtht 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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Simplified computation of compressible fluid flow parameters

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