Looking for Rocket Nozzle Equations

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SUMMARY

The discussion focuses on the search for specific equations related to rocket nozzle design, particularly for parabolic nozzles and divergent sections. The user, treddie, emphasizes the need for equations that connect wall angles to expansion ratios for various bell nozzle configurations. While references to the De Laval nozzle are provided, the user seeks more detailed mathematical relationships that are not readily available in existing literature.

PREREQUISITES
  • Understanding of rocket propulsion principles
  • Familiarity with fluid dynamics concepts
  • Knowledge of nozzle design parameters
  • Basic mathematical skills for interpreting equations and graphs
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  • Research the equations governing parabolic nozzle design
  • Study the relationship between wall angles and expansion ratios in rocket nozzles
  • Explore advanced fluid dynamics resources for nozzle flow analysis
  • Investigate the specific characteristics of bell nozzles and their performance metrics
USEFUL FOR

Aerospace engineers, rocket scientists, and students in propulsion systems who are involved in nozzle design and optimization will benefit from this discussion.

treddie
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Howdie.

This may not be the forum for this, but I am having trouble finding a forum on rocket science.

Specifically, it is easy to find various equations for rocket chamber and nozzle design, but they all leave out the crucial equations that relate parabolic nozzle, divergent section, inital & final wall angles to expansion ratio for various % bell nozzles. I have seen graphs of this, but no discussion of the underlying equations.

Any ideas?

Thank you very much,
treddie
 
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jmatejka,

Thank you for your response.:smile:

I've actually visited that page before, but what I am looking for is very specific and difficult to find information on. Here is an image of the graph I am trying to find the underlying equations for:

InitialFinalParabolaWallAnglesforDi.gif


This graph relates to the following nozzle geometry:

NozzleGeometry.gif
 

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