Vortex-fitted potential solution compared with cortex-captured Euler solution for delta wing with leading-edge vortex separation

Vortex-fitted potential solution compared with cortex-captured Euler solution for delta wing with leading-edge vortex separation

Hoeijmakers, H.W.M.
Rizzi, A.

National Aerospace Laboratory NLR

1984-07-23

The numerical solution for the inviscid incompressible flow about a 70-deg swept delta wing at 20 deg incidence is considered. Two solutions are presented and compared in detail. The first solution is obtained employing a free-vortex-sheet panel method that solves for the potential flow with "fitted" vortical flow regions. This type of method is now relatively well-established and in use at vaJi'ious places. In general, its results agree reasonably well with turbulent flow data obtained in experiments. The second solution is obtained by an Euler code in which the vortical flow regions are "captured". This type of method is presently evolving at a rapid rate, demonstrating its potential to compute rotational flows. In the present paper, through a detailed comparison of results of a panel method and an Euler code, the validity of the Euler-equation approach is assessed and it is indicated where improvement is required.

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Nationaal Lucht- en Ruimtevaartlaboratorium

Campus only

NLR MP 84070 U

Aerospace Engineering Reports

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(c)1984 National Aerospace Laboratory NLR