BOUNDARY INTERFERENCE AT SUBSONIC SPEEDS IN WIND TUNNELS WITH VENTILATED WALLS

Abstract

Equations and charts as obtained by theoretical analyses are presented for the evaluation of corrections which must be applied to test data as obtained from wind tunnels because of the presence of the test section boundaries. Results are presented for two-dimensional, circular, and rectangular tunnels with boundaries of the completely closed, completely open, slotted, or perforated variety. Interference factors accounting for the direct effects of model and wake blockage on the longitudinal velocity and of model lift on the upwash velocity are enumerated. In addition, consideration is given to the variation of the longitudinal and vertical velocity components along the tunnel axis leading to buoyancy and streamline-curvature corrections.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1969
Accession Number
AD0687440

Entities

People

  • C. F. Lo
  • M. Pindzola

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Boundaries
  • Coefficients
  • Curvature
  • Equations
  • Government Procurement
  • Governments
  • Mach Number
  • Models
  • Nomenclature
  • Three Dimensional
  • Two Dimensional
  • United States
  • Wake
  • Wind Tunnels

Readers

  • Aerodynamics/Aeronautics.
  • Fluid Mechanics and Fluid Dynamics.