A Perturbation Theory of Two-Dimensional Transonic Wind Tunnel Wall Interference (Theorie De La Perturbation De L'Interference De Parois Dans Une Soufflerie Bi-Dimensionelle Transsonique).

Abstract

The wind tunnel wall interference in transonic speed is formulated as perturbation to the basic flow around the airfoil in free air. The perturbation equation is derived from the transonic small disturbance equation and is linear but with variable coefficients containing the non-linear solution of the basic flow. The equation is solved numerically by a direct matrix method using the classical boundary condition for a porous wall. The solution in terms of lift versus angle of attack agrees well with that calculated directly from the small disturbance equation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1979
Accession Number
ADA071167

Entities

People

  • Y. Y. Chan

Organizations

  • National Research Council Canada

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Difference Equations
  • Differential Equations
  • Equations
  • Far Field
  • Flow
  • Flow Fields
  • Free Stream
  • Lepidoptera
  • Mach Number
  • Partial Differential Equations
  • Perturbation Theory
  • Pressure Distribution
  • Pressure Measurement
  • Transonic Flow
  • Transonic Wind Tunnels
  • Two Dimensional
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.
  • Small Business Innovation Research Program (SBIR) EDI Research and Innovation.