DTNSRDC Three Component Laser Doppler Velocimetry: Towing Tank System Measurement Errors.

Abstract

A three-component Laser Doppler Velocimetry (LDV) system is tested. Thirteen measurement errors are quantified in terms of: velocity field characteristics, LDV equipment design, and user - chosen system operating parameters. Operating parameter effects on measurement error are emphasized because usually they are the only way an experimenter can control errors. Background sections and appendixes explain in considerable detail, the origin of these measurement errors. First, the operating parameter choices for the towing tank LDV system are listed with a description of how they affect measurements. Then, each of the measurement errors is discussed, and this helps establish a functional relationship to operating parameters, LDV equipment design, and flow field characteristics. Keywords: Laser velocimeter; Three component velocity measurement; Towing tank; Bias errors.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1985
Accession Number
ADA164743

Entities

People

  • David J. Fry
  • David W Taylor

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Boundary Layer
  • Clocks
  • Computer Programs
  • Computers
  • Data Analysis
  • Error Analysis
  • Filters
  • Flow Fields
  • Fluid Flow
  • Free Stream
  • Geometry
  • Laser Beams
  • Layers
  • Low Pass Filters
  • Measurement
  • Stratified Fluids

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Marine Hydrodynamics
  • Regression Analysis.

Technology Areas

  • Directed Energy