FLOW NOISE INSIDE BOUNDARY LAYERS OF BUOYANCY-PROPELLED TEST VEHICLES,

Abstract

Boundary-layer pressure fluctuations were measured at selected points along the surface of a free-rising buoyancy-propelled torpedo-shaped vehicle. The pressure spectra were obtained throughout the band from 200 cps to 30 kcps. The transition region was located and the cross-correlation of noise pressure and shell vibration velocity in the laminar region was determined. Spacetime correlation was obtained for closely spaced transducers to show the lifetime, correlation length, and convection velocity of turbulent distrubances. The effect of finite transducer size on the measured pressure was determined. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1965
Accession Number
AD0615507

Entities

People

  • C. R. Nisewanger
  • F. B. Sperling

Organizations

  • Naval Air Weapons Station China Lake

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Buoyancy
  • Convection
  • Cross Correlation
  • Flow Noise
  • Layers
  • Motion
  • Noise
  • Spectra
  • Test Vehicles
  • Transducers
  • Transitions
  • Vehicles
  • Vibration

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster