Numerical Techniques for Solving Nonlinear Instability Problems in Smokeless Tactical Solid Rocket Motors.

Abstract

The results of an investigation to select a satisfactory numerical method for calculating the propagation of steep fronted shock like waveforms in a solid rocket motor combusion chamber are presented. A number of different numerical schemes were evaluated by comparing the results obtained for three problems: the shock tube problem, the linear wave equation, and nonlinear wave propagation in a closed tube. The most promising method--a combination of the Lax-Wendroff, Hybrid and Artificial Compression techniques was incorporated into an existing non-linear instability program. The capability of the modified program to treat steep fronted wave instabilities in low smoke tactical motors was verified by solving a number of motor test cases with disturbance amplitudes as high as 80% of the mean pressure. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1981
Accession Number
ADA100945

Entities

People

  • J. N. Levine
  • Joseph D. Baum

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Amplitude
  • Chambers
  • Combustion Chambers
  • Equations
  • Frequency
  • Government Procurement
  • Numerical Analysis
  • Plastic Explosives
  • Rocket Engines
  • Rocket Propulsion
  • Shock Tubes
  • Shock Waves
  • Tubes
  • Wave Equations
  • Wave Propagation
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Rocket Propulsion.