Laser Velocimeter Operation in the Water Tunnel

Abstract

A two component laser velocimeter is to be used to measure the mean and turbulent velocity distributions over a compliant surface in the water tunnel. Measurements very close to the surface will require operation of the laser velocimeter at slight angles of tilt to the horizontal plane. The present memo is an evaluation of the effect of the index of refraction of the window and water on the location of the velocimeter sample volumes in the flow. The angles of tilt of the system produce shifts in the locations of the vertical and horizontal beam crossings such that they no longer coincide.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1985
Accession Number
ADA630537

Entities

People

  • Virgil A. Sandborn

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Detectors
  • Crossings
  • Equations
  • Flow
  • Flow Noise
  • Geometry
  • Laser Velocimeters
  • Measurement
  • Physical Properties
  • Refraction
  • Refractive Index
  • Test And Evaluation
  • Thickness
  • Three Dimensional
  • Tunnels
  • Velocimeters
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Optical Physics and Photonics.
  • Radar Systems Engineering.

Technology Areas

  • Directed Energy