Experiments to Assess the Influence of Changes in the Tunnel Wall Boundary Layer on Transonic Wall Crossflow Characteristics

Abstract

The equivalent porosity of the test section wall in a transonic wind tunnel with a fixed geometric porosity and varying wall boundary-layer displacement thickness, has been investigated. Previous experiments have demonstrated that the boundary-layer displacement thickness on the wall influences the wall crossflow characteristic. Experimental data from a Ludwieg tube type of transonic tunnel are compared with data from conventional transonic tunnels in the Mach number range from 0.95 to 1.15. The displacement thickness studied is comparatively thin and represents typical values which will be encountered in future high Reynolds number transonic tunnels.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1975
Accession Number
ADA017666

Entities

People

  • R. F. Starr

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Boundaries
  • Boundary Layer
  • Calibration
  • Engineering
  • Free Stream
  • Instrumentation
  • Layers
  • Mach Number
  • Measurement
  • Pressure Distribution
  • Pressure Measurement
  • Stagnation Pressure
  • Static Pressure
  • Tennessee
  • Transonic Wind Tunnels
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Fluid Dynamics.