SOME RESULTS OF EXPERIMENTAL INVESTIGATIONS OF THE SURFACE PRESSURE FIELD DUE TO A TURBULENT BOUNDARY LAYER.

Abstract

Experimental results for the space-time correlations of the fluctuating pressure field of a turbulent boundary layer are given, and an empirical representation of the pressure field suitable for structural response calculations is presented. Variation with Mach number of r.m.s. pressure as a function of skin friction is given for Mach numbers up to about 1.6. The probability distribution of the pressure fluctuations at a fixed point in the field is found to approximate closely to Gaussian. The acoustic power output from a boundary layer on a larger boundary surface is obtained. Spectra of boundary layer noise in tow jet aircraft are presented and compared with the spectrum of the boundary layer excitation. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1961
Accession Number
AD0631507

Entities

People

  • J. L. Willis
  • M. K. Bull

Organizations

  • University of Southampton

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Boundaries
  • Boundary Layer
  • Friction
  • Jet Aircraft
  • Layers
  • Mach Number
  • Probability
  • Probability Distributions
  • Skin Friction
  • Spectra
  • Structural Response
  • Turbulent Boundary Layer

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Fluid Mechanics and Fluid Dynamics.
  • Statistical inference.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster