High Chamber Pressure Blast Tube and Nozzle Material Evaluation. Volume 2

Abstract

The set of Aerotherm computer programs (ACE, CMA, ARGEIBL) which were validated for charring ablating and carbon/carbon materials in conventional and low velocity blast tube nozzles were validated for these same materials for high velocity blast tube nozzles, operation at high chamber pressures (up to 3000 psia), and aluminized CTPB propellants which vary in aluminum content from 5 to 18 percent. The validation was determined based on comparisons between measured and predicted surface recession and char depth thickness and between predicted and determined convective heat transfer coefficients. In general, the agreement between the analytical predictions and the surface recession and char depth data was within the experimental accuracy of the measurements with the exception of the throat. The best agreement was obtained for the analysis locations in the blast tube and exit cone. The poorest agreement occured for the pyrolytic graphite washers in the nozzle throat region.

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Document Details

Document Type
Technical Report
Publication Date
Jun 17, 1974
Accession Number
AD0780532

Entities

People

  • T. E. Frakes
  • T. V. O'hara
  • Wendell A. Stephen

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Chemical Properties
  • Chemical Reaction Properties
  • Chemical Reactions
  • Combustion
  • Computer Programs
  • Energy
  • Flow Fields
  • Heat Transfer
  • Heat Transfer Coefficients
  • Material Degradation Processes
  • Materials
  • Materials Processing
  • Pyrolysis
  • Rocket Engines
  • Thermal Conductivity
  • Two Dimensional

Readers

  • Explosive Engineering.
  • Rocket Propulsion.
  • Thermal Physics or Thermal Science.