Large Flat Plate Turbulent Boundary Layer Evaluation

Abstract

The flow characteristics of a 3.1m long by 1.22m span large flat plate mounted in the test section of the ARL Penn State 48-inch diameter water tunnel have been evaluated. The turbulent boundary layer over the central 50% of the span of the plate was fully developed, two dimensional and has a near zero streamwise pressure gradient. One component laser Doppler velocimeter measurements were made at four freestream velocities and at nine streamwise locations on the plate. Resulting friction velocities on the plate varied from 0.175 to 0.45 m/s, approximately. Reynolds numbers, based on streamwise distance from the boundary layer virtual origin, ranged from 4.5 million to 33.5 million. Momentum thickness Reynolds numbers ranged from 6570 to 39,000. This range of momentum thickness Reynolds number is uniquely large for a laboratory flow. Keywords: Turbulent boundary layer, Test and evaluation, Flat plate models.

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Document Details

Document Type
Technical Report
Publication Date
May 18, 1990
Accession Number
ADA225316

Entities

People

  • A. A. Fontaine
  • H. L. Petrie
  • S. T. Sommer
  • T. A. Brungart

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Classification
  • Flat Plate Models
  • Fluid Flow
  • Friction
  • Instrumentation
  • Laser Induced Fluorescence
  • Layers
  • Leading Edges
  • Measurement
  • Mechanics
  • Pressure Gradients
  • Test And Evaluation
  • Turbulent Boundary Layer
  • Two Dimensional
  • Velocimeters
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.

Technology Areas

  • Directed Energy