Transonic Noise Generation by Duct and Profile Flow.

Abstract

Part A: Acoustic distortions which are generated by a downstream instability of shear layers are travelling upstream in the subsonic part of the laval flow and are acting on the shock wave at the end of the supersonic part. This interaction causes strong oscillations. Part B: Different kinds of separation and secondary vortex generation have a governing influence on profile-vortex interaction flow. Keywords: Laval nozzle; Transonic noise generation; Shock wave instability; Flow separation; Boundary layer; Shear layer; Acoustic resonance; Profile-vortex interaction; Secondary vortex; Vortex noise; and Digital interferogram analysis. (West Germany)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1984
Accession Number
ADA157163

Entities

People

  • G. E. A. Meier

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Resonance
  • Boundary Layer
  • Cameras
  • Computer Programs
  • Data Processing
  • Flow Visualization
  • Fluid Dynamics
  • Geometry
  • Image Processing
  • Mach Number
  • Measurement
  • Pressure Distribution
  • Pressure Transducers
  • Shock Tubes
  • Standing Waves
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Combustion and Flow Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow