A Computational Blast Valve Study

Abstract

The BRL Q1D code was modified to include a diaphragm blast valve model. The diaphragm/blast valve model was verified and used to computationally determine the suitability of using a fast-acting (blast) valve to replace diaphragm-breaking as the means of initiation flow in a large shock. For a 1- dimensional model of the Centre d'Etudes de Gramat shock tube, it was determined that a blast valve which opens in less than 50 milliseconds approximated shocks within the following limitations: a) peak overpressure was within 15% of its final value; b) time of arrival of peak was within 15% of its final value; c) rise time of the incident shock was increased no more than 8 ms over the rise time computed for the instantaneous blast valve opening.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1985
Accession Number
ADA153050

Entities

People

  • Dixie M. Hisley

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Counter WMD
  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Computer Simulations
  • Engineering
  • Equations
  • Euler Equations
  • Military Applications
  • Military Research
  • Molecular Dynamics
  • National Security
  • Overpressure
  • Security
  • Shock Tubes
  • Simulations
  • Simulators
  • Skeletal Muscle
  • Tubes
  • United States

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