Measurements of Skin Friction in Channel Flow

Abstract

The purpose of these experiments have been to measure the effect of passive means for affecting the skin friction in channel flow. Early measurements indicated that a semi-random distribution of chevrons with a thickness of 5 to 6 wall units could reduce the overall friction in the channel by as much as 12%, whereas the same type of chevrons uniformly spaced increased the channel friction by 20%. The measurements where these results were obtained were made in a portion of the channel that had not yet reached fully developed channel flow properties.

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Document Details

Document Type
Technical Report
Publication Date
Apr 26, 1999
Accession Number
ADA374704

Entities

People

  • Lawrence Sirovich
  • Sture Karlsson

Organizations

  • Brown University

Tags

DTIC Thesaurus Topics

  • Air Force
  • Applied Mathematics
  • Channel Flow
  • Dc Motors
  • Drag
  • Flow
  • Flow Rate
  • Friction
  • Guide Vanes
  • Heat Transfer
  • Mathematics
  • Measurement
  • Skin Friction

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Electrical Engineering
  • Fluid Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster