Velocity Measurements on the Aerodynamic Wake of a Hovercraft Using Laser Doppler Anemometry.

Abstract

The laser Doppler technique has been applied to determine the aerodynamic wake velocity components behind a tethered air cushion vehicle (ACV) which runs close to a confining wall. Two velocity components were measured for a number of locations behind the vehicle, using the fringe mode and forward scattering from unseeded air. Some auxiliary forward and back scatter experiments with pulsed and D C lasers are also described. A video tape recorder was used to record all the laser Doppler data, which could then be processed by an oscilloscope, a spectrum analyzes or a DISA 55L signal processor. Results are presented which show that the stabilized wake effects are minimal for UTIAS ACV and its associated facility. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1976
Accession Number
ADA034018

Entities

People

  • J. H. Deleeuw
  • W. E. R. Davies

Organizations

  • University of Toronto

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Cushion Vehicles
  • Air Force
  • Argon Lasers
  • Forward Scattering
  • Frequency
  • Laser Beams
  • Lasers
  • Measurement
  • Recording Systems
  • Scattering
  • Spectra
  • Spectrum Analyzers
  • Tape Recorders
  • Tape Recording
  • Tapes
  • Test Facilities
  • Video Tapes

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Maritime Combat Support and Expeditionary Logistics.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy