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An efficient coordinate transformation technique for unsteady, transonic aerodynamic analysis of low aspect-ratio wingsAn efficient coordinate transformation technique is presented for constructing grids for unsteady, transonic aerodynamic computations for delta-type wings. The original shearing transformation yielded computations that were numerically unstable and this paper discusses the sources of those instabilities. The new shearing transformation yields computations that are stable, fast, and accurate. Comparisons of those two methods are shown for the flow over the F5 wing that demonstrate the new stability. Also, comparisons are made with experimental data that demonstrate the accuracy of the new method. The computations were made by using a time-accurate, finite-difference, alternating-direction-implicit (ADI) algorithm for the transonic small-disturbance potential equation.
Document ID
19840048899
Document Type
Conference Paper
Authors
Guruswamy, G. P.
(Informatics General Corp. Palo Alto, CA, United States)
Goorjian, P. M.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 84-0872
Distribution Limits
Public
Copyright
Other
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