Structural/Ballistic Instability Ageout Mechanism in the Sparrow Mark 52 SRM

Abstract

A three dimensional finite element analysis and a one dimensional incompressible flow model were used to investigate the interaction between the internal ballistics and the structural grain deformations for the Sparrow Mark 52 rocket motor. The results confirm earlier investigators' conclusions (based on two dimensional structural analysis) that a mechanism exists for pressure spiking driven by choking of the gas flow within the bore cavity due to grain structural deformations. Significant differences were found between the 2D and 3D results, however; the 3D analysis requires a higher propellant modulus to prevent choking under the same analysis conditions.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1996
Accession Number
ADA366890

Entities

People

  • D. I. Thrasher
  • P. R. Empleo

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Bulk Modulus
  • Combustion
  • Equations
  • Flow
  • Gas Flow
  • Geometry
  • Instability
  • Materials
  • Mechanical Properties
  • Pressure Distribution
  • Propellant Grains
  • Propellants
  • Rocket Engines
  • Solid Propellants
  • Structural Analysis
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Rocket Propulsion.
  • Structural Dynamics.