Turbulent Boundary Layer Measurement Techniques.

Abstract

This report reviews the principles and practice of hot wire anemometry for the measurement of turbulent flows. The requirements and pitfalls involved in the use of hot wire anemometers in supersonic flows are addressed and the methods used for data acquisition and reduction are detailed. Examples of measurements obtained in AFWAL facilities are presented. Unfortunately in most flows of practical interest, local fluctuation levels exceed those for which reliable hot wire turbulence measurements can be expected. However, our recent developments in laser velocimetry facilitate the non-intrusive, linear measurement of high speed turbulent flows. Measurements of zero pressure gradient and ramp induced, adverse pressure gradient flows are presented. The results emphasize the need for confined hot wire and laser velocimeter studies to determine the reliable and useful ranges of both instruments. Keywords: Supersonic Boundary Layers.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1986
Accession Number
ADA174806

Entities

People

  • A. W. Fiore
  • F. K. Owen

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Compressible Flow
  • Computational Fluid Dynamics
  • Convection
  • Differential Equations
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Heat Transfer
  • Hot Wire Anemometers
  • Laser Velocimeters
  • Mach Number
  • Measurement
  • Reynolds Number
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Systems Analysis and Design

Technology Areas

  • Directed Energy
  • Hypersonics