EXPERIMENTAL INVESTIGATION OF LAMINAR FLOW DEVELOPMENT IN A RECTANGULAR CHANNEL USING A LASER ANEMOMETER

Abstract

Flow in the entrance region of a parallel plate channel was theoretically investigated by others with little or no experimental verification. Presented is a new method for the analysis which involves a linearization of the inertia terms and the introduction of a stretched axial coordinate. Solutions are obtained for the velocity distribution in an incompressible fluid which is valid from the duct inlet to the fully developed region. An experimental parallel plate channel was operated using water as the working fluid. Velocity profiles, on the basis of the stretched axial coordinate, were established with the use of a laser doppler velocimeter. These velocity profiles are compared with the theoretical profiles. A significant variation between the experimental and theoretical velocity is seen near the inlet of the channel.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1969
Accession Number
AD0695032

Entities

People

  • W. H. Goethert
  • W. T. Snyder

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Channel Flow
  • Computer Programs
  • Engineering
  • Equations
  • Experimental Data
  • Flow
  • Flow Rate
  • Frequency
  • Incompressible Flow
  • Laminar Flow
  • Laser Anemometers
  • Measurement
  • Navier Stokes Equations
  • Pressure Gradients
  • Velocimeters

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Coastal and Marine Engineering/Sediment Transport/Hydraulic Engineering
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Directed Energy