Shock-Turbulence Interaction and the Generation of Noise

Abstract

Interaction of convected field of turbulence with shock wave is analyzed to yield modified turbulence, entropy spottiness, and noise generated downstream of the shock. Analysis is generalization of single-spectrum-wave treatment of TNN 2864. Formulas for spectra and correlation are obtained. Numerical calculations yield curves of rms velocity components, temperature, pressure, and noise in db against Mach number for M = 1 to =; both isotropic and strongly axisymmetric (lateral/Longitudinal = 36/1) initial turbulence are treated. In either case, turbulence of 0.1 percent longitudinal component generates about 120 dbs of noise.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1955
Accession Number
ADA278325

Entities

People

  • H. S. Ribner

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Aeronautical Laboratories
  • Biomedical Research
  • Cartesian Coordinates
  • Demographic Cohorts
  • Equations
  • Mach Number
  • Naval Operations
  • Secondary Waves
  • Shock
  • Shock Waves
  • Sound Waves
  • Spectra
  • Stratified Fluids
  • Turbulence
  • Two Dimensional
  • Waves

Fields of Study

  • Physics

Readers

  • Agricultural Chemistry/Soil Science
  • Calculus or Mathematical Analysis
  • Fluid Mechanics and Fluid Dynamics.