ON CONVECTION VELOCITIES IN TURBULENT SHEAR FLOWS,

Abstract

It is shown how the usual approach, through properties of the space-time correlations, to the convection velocity of turbulent motions in jets and boundary layers leads to difficulties of interpretation when the flow departs from rigid convection. A more rigorous approach in terms of a wave-number/velocity spectrum overcomes the difficulties, and allows the definition of a wave-number-dependent convection velocity that is relevant to studies of aerodynamic noise and wave generation in panels and in water. A simple experimental method for obtaining the spectrum is described, and measurements are presented for various radial positions in e shear layer of a circular jet, and for pressure fluctuations under a turbulent boundary layer. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0436650

Entities

People

  • J. A. B. Wills

Organizations

  • AGARD

Tags

DTIC Thesaurus Topics

  • Aerodynamic Noise
  • Boundaries
  • Boundary Layer
  • Convection
  • Flow
  • Fluid Dynamics
  • Generators
  • Layers
  • Measurement
  • Noise
  • Noise Generators
  • Shear Flow
  • Spectra
  • Turbulent Boundary Layer
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Space