A THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE ACOUSTIC RESPONSE OF CAVITIES IN AN AERODYNAMIC FLOW

Abstract

Theory is developed for the resonant frequencies and pressure amplifications of a rectangular cavity of arbitrary dimensions in a flow field. An intermediate step involves the derivation of radiation impedance for a cavity at all Mach numbers, using the concepts of retarded pot ntial t eory. Experim ntal results are given for small cavities tested in the subsonic regime and for cavities up to 8 in. in length at supersonic Mach numbers from 1.75 to 5 0. Comparisons are drawn between theoretical and experimental frequency and amplitude response, indicating that the theory developed gives very good definition of the problem.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1962
Accession Number
AD0277803

Entities

People

  • H. E. Plumblee
  • J. S. Gibson
  • L. W. Lassiter

Organizations

  • Lockheed Martin

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Engineered Resilient Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Acoustics
  • Artificial Intelligence
  • Boundary Layer
  • Dynamic Pressure
  • Flow
  • Flow Fields
  • Flow Visualization
  • Frequency
  • Impedance
  • Mach Number
  • Plastic Explosives
  • Radiation
  • Resonant Frequency
  • Standing Waves
  • Static Pressure
  • Waves

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Control Systems Engineering.
  • Snow Cover Descriptors for Reptiles and Their Illustrations.

Technology Areas

  • Hypersonics