Fast Computer Program for Nonequilibrium Rocket Plume Predictions

Abstract

A fast computer program for predicting nonequilibrium rocket plume properties is described. The analytical model assumes parallel turbulent (or laminar) mixing between concentric chemically reacting streams and can also be used for studying chemical lasers and re-entry wakes. The effects on radar attenuation are also presented. The equations for free shear layer mixing with nonequilibrium chemistry are solved. The stability problems inherent in fully explicit finite difference schemes are shown to be eliminated. Computer run times for typical afterburning rocket plume calculations are shown to be decreased over the original (fully explicit) AeroChemaxisymmetric mixing with nonequilibrium chemistry program. Both the analysis and computer program write- up are presented, including a sample calculation and a FORTRAN listing.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1972
Accession Number
AD0751984

Entities

People

  • C. J. Kau
  • H. S. Pergament
  • R. R. Mikatarian

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Reactions
  • Chemistry
  • Combustion
  • Computer Programs
  • Computers
  • Differential Equations
  • Electrical Conductivity
  • Electrical Properties
  • Electron Density
  • Free Energy
  • Free Stream
  • Mach Number
  • Plastic Explosives
  • Reaction Mechanisms
  • Thermodynamic Properties
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Dynamics.
  • Rocket Propulsion.

Technology Areas

  • Directed Energy