Aerodynamic and Frequency Dependent Errors in an Air Blast Gage

Abstract

Tests were conducted in the supersonic and hypersonic wind tunnel to determine the aerodynamic error due to mass flow around a pancake type gage. This air blast gage was used extensively to measure the transient side-on pressure generated by an explosive charge. Data on flat surfaces are also presented. The error due to mass flow is a function of both Mach number and Reynolds number. Error is largest near Mach one. Measurements of impulse on gages with various shapes of pulses are considered. If there is no negative phase, impulse is independent of the gage size; the negative phase results in a low value of impulse for a gage longer than 1/10 the length of the positive phase.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1966
Accession Number
AD0649461

Entities

People

  • Henry J. Goodman

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Blast Waves
  • Boundary Layer
  • Explosive Charges
  • Explosives
  • Flow
  • Flow Fields
  • Frequency
  • Leading Edges
  • Mach Number
  • Mass Flow
  • Measurement
  • Pressure Distribution
  • Pressure Gradients
  • Pressure Measurement
  • Reynolds Number
  • Steady Flow
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Explosive Engineering.
  • Fluid Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow