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Lifting-surface theory for calculating the loading induced on a wing by a flap by Wayne Johnson. by Johnson, Wayne, 1946- is a nonfiction available to read on EtoBox.

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A method is described for using lifting-surface theory to obtain the pressure distribution on a wing with a trailing-edge flap or control surface. The loading has a logarithmic singularity at the flap edges, which may be determined directly by the method of matched asymptotic expansions. Expressions are given for the singular flap loading for various flap hinge line and side edge geometries, both for steady and unsteady flap deflection. The regular part of the flap loading must be obtained by inverting the lifting-surface-theory integral equation relating the pressure and the downwash on the wing: procedures are described to accomplish this for a general wing and flap geometry. The method is applied to several example wings, and the results are compared with experimental data. Theory and test correlate well

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Author

Johnson, Wayne, 1946-

Publisher

National Aeronautics and Space Administration ; For sale by the National Technical Information Service], 1972.

Published

1972

Language

EN

Category

nonfiction