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TsAGI Science Journal

ISSN Imprimer: 1948-2590
ISSN En ligne: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.v40.i5.40
pages 561-569

NOSE PARTS OF MINIMAL WAVE DRAG WITH THE FRONT FACE AND THE POWER-LAW GENEATRIX

Dmitry Sergeevich Ivanyushkin
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovskystr., Zhukovsky, 140180, Moscow region, Russia
Sergey Alexandrovich Takovitskii
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovskystr., Zhukovsky, 140180, Moscow region, Russia

RÉSUMÉ

In this paper, we have considered the problem ofsearching for axisymmentrical nose parts of minimal wave drag. Optimization was realized in the class of bodies with a front face and power-law geneatrix. The radius of the front face and the power-law exponent are used as parameters of optimization. The nose parts, which were found on analytical solution of this task, were taken as initial bodies. Optimization was performed with the help of the method of cyclical coordinate-wise descent. The nose parts of the minimal wave drag have been obtained for lengthening λ = 1−8 at the Mach number M = 2 and for the range M = 1.5−4 at a fixed lengthening λ = 2. The obtained nose parts have been compared with the well-known optimal bodies on values of wave deag and geometrical parameters.


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