The Measurements of Axisymmetric Air Turbulent Jet Flow with an Individual Realization Laser Velocimeter System,

Abstract

This paper describes the measurements of axisymmetric air turbulent jet flow with the use of an IRLV system. The distributions of axial mean velocity, turbulent intensity and probability density functions of velocity in the initial region of jet flow were obtained. The data from LV were sampled and processed automatically by a microprocessor. The experiments show that the velocity measurements can be realized even with the air particles in their natural state. The measurements of the mean velocity were also simultaneously made with aa hot wire anemometer in order to compare with those made with a LV. Their results were in good coincidence in the core flow region. The velocity bias was increased with the decrease of data rate and increase of turbulent intensity in the mixing boundary layer. Keywords: Laser velocimeters (LV); Velocity measurements. (Translations)

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Document Details

Document Type
Technical Report
Publication Date
May 29, 1985
Accession Number
ADA157554

Entities

People

  • Dekang Chen
  • He Yu
  • Shengli Xie
  • Xuhui Shen

Organizations

  • National Air and Space Intelligence Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Anemometers
  • Axisymmetric
  • Boundary Layer
  • Data Rate
  • Flow
  • Fluid Mechanics
  • Frequency
  • Hot Wire
  • Hot Wire Anemometers
  • Jet Flow
  • Laser Velocimeters
  • Measurement
  • Probability
  • Probability Density Functions
  • Statistical Analysis
  • Velocimeters
  • Waveplates

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