Acoustic Thermometric Measurements of Propellant Gas Temperatures in Guns

Abstract

A technique is developed which permits propellant gas temperature to be extracted from pressure measurements taken within the gun tube. Basically similar to acoustic thermometry, the wave speed of a signal propagating at the sonic velocity is determined. In this application, the speed of the expansion wave which propagates back up the gun tube following shot ejection is derived from pressure data taken at discrete axial locations within four calibers of the muzzle of a 20mm gun. The propellant gas temperature is calculated from the measured speed of this wave and the equation of state.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1976
Accession Number
ADA030359

Entities

People

  • Donald D. Shear
  • Edmund J. Gion
  • Edward M. Schmidt

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Ballistics
  • Data Reduction
  • Equations
  • Experimental Data
  • Fluid Flow
  • Instrumentation
  • Interior Ballistics
  • Jet Propulsion
  • Mach Number
  • Measurement
  • Measuring Instruments
  • Military Research
  • National Security
  • Physics Laboratories
  • Projectiles
  • Propellants
  • Security

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Thermal Physics or Thermal Science.
  • ballistics.