533.6.011.5 Modeling supersonic flow around blunted cones, taking into account the curvature discontinuity along the generatrix of the solid

Bulgakov V. N. (Bauman Moscow State Technical University), Kotenev V. P. (Bauman Moscow State Technical University), Sapozhnikov D. A. (МГТУ им.Н.Э.Баумана)

SUPERSONIC FLOW, CURVATURE DISCONTINUITY ALONG A GENERATRIX OF A SOLID, GENETIC ALGORITHM


doi: 10.18698/2309-3684-2017-2-8193


The article presents an analytical expression for calculating pressure on the surface of blunted cones in a supersonic gas flow, taking into account the curvature discontinuity along the generatrix. We used a genetic algorithm and multi-stage functional optimisation methods for the least-squares method to determine free parameters of the expression. We compare the results obtained to the rigorous numerical solution to the inviscid problem. The comparison shows that it is possible to use the analytical expression for pressure distribution over a surface in a wide Mach number range for various cone halfangles. The expression proposed accounts for the curvature discontinuity along the generatrix at the point where the sphere is tangent to the conical surface, unlike the expressions found in previously published works.


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Bulgakov V.N., Kotenev V.P., Sapozhnikov D.A. Modeling supersonic flow around blunted cones, taking into account the curvature discontinuity along the generatrix of the solid. Маthematical Modeling and Coтputational Methods, 2017, №2 (14), pp. 81-93



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