Improvements to the kernel function method of steady, subsonic lifting surface theory

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National Aeronautics and Space Administration, 1974 - 54 pages
The application of a kernel function lifting surface method to three dimensional, thin wing theory is discussed. A technique for determining the influence functions is presented. The technique is shown to require fewer quadrature points, while still calculating the influence functions accurately enough to guarantee convergence with an increasing number of spanwise quadrature points. The method also treats control points on the wing leading and trailing edges. The report introduces and employs an aspect of the kernel function method which apparently has never been used before and which significantly enhances the efficiency of the kernel function approach.

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Contents

INTRODUCTION
1
THE BASIC METHOD OF SOLUTION
7
CHOICE OF CONTROL POINTS
21

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