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Lifting-surface theory for a semi-infinite wing in oblique gust (1974)

Widnall, S. E. ; Chu, S.

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Publication Date: 2011-08-16

Description: An unsteady lifting-surface theory is developed for the calculation of the airload on a semi-infinite-span thin wing in a compressible flow due to interaction with an oblique gust. By using the solutions obtained for a two-dimensional wing, the problem is formulated so that the unknown is taken to be the difference between the airload on the semi-infinite wing and that on a two-dimensional wing under the same gust conditions. Since this airload difference is nonzero only near the wing tip, the control points need be distributed in the tip region only; this significantly simplifies the numerical procedure. Results are presented for a wing with rectangular tip. The implication for noise and unsteady loads due to blade-vortex interaction for helicopter rotors is discussed.

Keywords: AERODYNAMICS

Type: AIAA Journal; 12; Dec. 197

Format: text

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