Actions for Numerical optimization techniques for bound circulation distribution for minimum induced drag of Nonplanar wings : Computer program documentation

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Numerical optimization techniques for bound circulation distribution for minimum induced drag of Nonplanar wings : Computer program documentation

Author
Ku, T. J.
Published
Aug 1, 1981.
Physical Description
1 electronic document
Additional Creators
Kuhlman, J. M.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
A two dimensional advanced panel far-field potential flow model of the undistorted, interacting wakes of multiple lifting surfaces was developed which allows the determination of the spanwise bound circulation distribution required for minimum induced drag. This model was implemented in a FORTRAN computer program, the use of which is documented in this report. The nonplanar wakes are broken up into variable sized, flat panels, as chosen by the user. The wake vortex sheet strength is assumed to vary linearly over each of these panels, resulting in a quadratic variation of bound circulation. Panels are infinite in the streamwise direction. The theory is briefly summarized herein; sample results are given for multiple, nonplanar, lifting surfaces, and the use of the computer program is detailed in the appendixes.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19830022114.
Accession ID: 83N30385.
NAS 1.26:3458.
NASA-CR-3458.
Terms of Use and Reproduction
No Copyright.
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