Influence of Roughness and Blowing on Compressible Turbulent Boundary Layer Flow

Abstract

The determination of the relative and combined effects of surface roughness and mass transfer on turbulent boundary-layer development, and in particular, on skin-friction drag was the prime objective of this study. Wind- tunnel tests were conducted in the NSWC Boundary-Layer Channel at a freestream Mach number of 2.9. The thick nozzle-wall boundary layer in the facility was subjected to a systematic variation of surface roughness and mass transfer conditions. Boundary-layer pressure and temperature surveys were obtained and skin friction was measured directly using a skin-friction balance which had a provision for active blowing through the floating drag element. Data comparisons with skin-friction theories and law-of-the-wall velocity profile correlations are presented.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1979
Accession Number
ADA077642

Entities

People

  • Robert L. P. Voisinet

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Boundary Layer
  • Computational Fluid Dynamics
  • Elements
  • Fluid Dynamics
  • Fluid Mechanics
  • Heat Transfer
  • Instrumentation
  • Mach Number
  • Mass Transfer
  • Materials
  • Measurement
  • Mechanics
  • Reynolds Number
  • Test Equipment
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.