DTIC ADA071167: A Perturbation Theory of Two pdf

DTIC ADA071167: A Perturbation Theory of Two

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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

• Creator/s: Defense Technical Information Center
• Date: 4/1/1979
• Year: 1979
• Book Topics/Themes: DTIC Archive, Chan, Y Y, NATIONAL AERONAUTICAL ESTABLISHMENT OTTAWA (ONTARIO), *INTERFERENCE, *TRANSONIC WIND TUNNELS, *BOUNDARY LAYER FLOW, CANADA, ANGLE OF ATTACK, FLOW FIELDS, PERTURBATION THEORY, WALLS, TWO DIMENSIONAL FLOW, TRANSONIC AIRFOILS

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