Accession Number:

ADA071167

Title:

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).

Descriptive Note:

Aeronautical rept.,

Corporate Author:

NATIONAL AERONAUTICAL ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s):

Report Date:

1979-04-01

Pagination or Media Count:

27.0

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

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE