Application of the Laser Velocimeter for Trailing Vortex Measurements

Abstract

This report summarizes a three-year analytical and experimental program to develop a dual-scatter laser velocimeter system to map the flow fields of trailing vortices stemming from the wingtips of flying aircraft. The basic design parameters ascertaining feasibility of the LV-measuring technique are presented. Included is a discussion and evaluation of a newly developed two-dimensional Bragg cell (TDBC) for resolving directional ambiguity. The electronics instrumentation developed for the operation of the TDBC is evaluated in detail. In addition, the development of a direct readout system yielding considerable improvement over the initial instrument is described and evaluated.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1974
Accession Number
ADA002151

Entities

People

  • A. E. Lennert
  • F. L. Crosswy
  • H. T. Kalb

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acousto-Optic Modulators
  • Air Force
  • Aircrafts
  • Data Acquisition
  • Data Processing
  • Detectors
  • Diffraction
  • Equations
  • Fluid Flow
  • Geometry
  • Measurement
  • Optics
  • Refractive Index
  • Remote Sensing
  • Test And Evaluation
  • Velocimeters
  • Waveforms

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Fluid Dynamics.
  • Systems Analysis and Design

Technology Areas

  • Directed Energy
  • Microelectronics
  • Microelectronics - Microelectromechanical Systems