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TsAGI Science Journal

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

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.v40.i5.70
pages 609-617

STUDY OF VISCOUS−INVISCID INTERACTION ON AN OSCILLATING MODEL OF AN AIRPLANE WITH A SWEPT WING

Ivan Vasilyevich Kolin
Central Aerohydrodynamic Institute (TsAGI)
Vladimir Georgievich Markov
Central Aerohydrodynamic Institute (TsAGI)
Viktor Konstantinovich Svyatodukh
Central Aerohydrodynamic Institute (TsAGI)
Tamara Ivanovna Trifonova
Central Aerohydrodynamic Institute (TsAGI)
Dmitry Valeryevich Shukhovtsov
Central Aerohydrodynamic Institute (TsAGI)

RÉSUMÉ

Results are given of experimental studies (performed in a subsonic wind tunnel with an open working part) of flows over an airfoil of a model airplane with a swept wing oscillating with amplitudes Asub>α= 3 and 5° at a Strouhal number Shwz= 0.029 relative to setting angles of attack α0= 10 and 16° corresponding to single-valued (at α0 = 10°) and hysteretic (α0 = 16°) dependences of the static aerodynamic forces and moments on the angles of attack. It is shown that the extent of the development of unsteady separation on the oscillating wing is different at each moment in time during a single period of oscillations. Regimes of weak and moderate viscous-inviscid interactions and a regime of strong dynamic separation were investigated.


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