A SIMPLE MECHANICAL METHOD FOR MEASURING THE REFLECTED IMPULSE OF AIR BLAST WAVES

Abstract

A mechanical method is described for measuring the impulse imparted to a flat rigid surface by the reflection (at 90 deg. or normal incidence) of an air blast wave. The method consists of measuring the velocity at which a cylindrical plug of known mass is projected from a hole in a large rigid surface by a normally incident blast wave and computing the impulse from Newton's 2nd law. Experimental results were obtained for spherical Pentolite explosive charges ranging in weight from 1/4 to 2 lbs and scaled distances from 0.5 to 2.5 ft/(cu.rt. lb.). Results of 154 trials are tabulated and also presented graphically. In addition, a comparison is made with data obtained with piezoelectric gages.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1957
Accession Number
AD0149358

Entities

People

  • J. D. Patterson Ii
  • O. T. Johnson
  • W. C. Olson

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Counter IED
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Aircrafts
  • Altitude
  • Blast Waves
  • Cameras
  • Explosive Charges
  • Explosives
  • Laboratory Procedures
  • Measurement
  • Military Operations
  • Munitions
  • Ordnance Laboratories
  • Physics Laboratories
  • Standards
  • Time Intervals
  • Universities

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Fluid Dynamics.
  • Rocket Propulsion.