THE PHYSICAL PICTURE OF FLOW NOISE,

Abstract

The study of flow noise is based on exact computation, on model studies, and on statistical analysis. Measurements were performed in the water tunnel and with the aid of buoyant units. The effect of surface roughnesses was studied with a rotating cylinder. Special attention is given to radiated noise, since hydrophones used in underwater acoustics are relatively large and record the radiation noise only. Flow noise was reduced by tripping the boundary layer by coating the surface with sound-absorbent varnishes. It seems probable that flow noise can be reduced by reducing wall vibrations. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0436677

Entities

People

  • Eugen J. Skudrzyk
  • Gillian P. Haddle

Organizations

  • AGARD

Tags

DTIC Thesaurus Topics

  • Acoustics
  • Boundary Layer
  • Flow
  • Flow Noise
  • Measurement
  • Noise
  • Radiated Noise
  • Roughness
  • Statistical Analysis
  • Surface Roughness
  • Turbulent Flow
  • Underwater Acoustics
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Fluid Dynamics.
  • Structural Dynamics.