Laser Velocimeter Measurements and Analysis in Turbulent Flows with Combustion. Part 4. Two-Component Cold-Flow Measurements.

Abstract

A unique two component, two color Laser doppler Velocimeter (LDV) has been designed and built. The system includes Bragg cell modulators in all four beams, and a correction lens system to correct for the aberration induced by the cylindrical quartz test section. A dedicated PDP 11/40 mini-computer with DMA capability is used for data collection, storage, and processing. Two component (axial and radial) velocity measurements have been made in the turbulent flow field following an axisymmetric sudden expansion. Mean streamwise and radial velocity and turbulence intensity measurements were made. Reynolds stresses were computed. Keywords: Turbulent measurements; Laser velocimeter; Bias errors; Recirculating flows.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1986
Accession Number
ADA167554

Entities

People

  • H. D. Thompson
  • R. D. Gould
  • Warren H. Stevenson

Organizations

  • Purdue University

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Acousto-Optic Modulators
  • Air Force
  • Boundary Layer
  • Computational Fluid Dynamics
  • Contracts
  • Engineering
  • Flow
  • Flow Fields
  • Fluid Mechanics
  • Measurement
  • Mechanical Engineering
  • Mechanics
  • Radial Velocity
  • Turbulent Flow
  • Turbulent Mixing
  • Two Dimensional
  • Velocimeters

Fields of Study

  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Directed Energy