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Thermophysics and Aeromechanics

2006 year, number 4

Experimental and theoretical investigation of boundary layer perturbations on a low-aspect-ratio wing

V.V. Kozlov1, I.D. Zverkov1, B.Yu. Zanin1, A.V. Dovgal1, V.Ya. Rudyak 2,3, E.G. Bord2, and D.F. Kranchev2,3
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
The Novosibirsk State University of Architecture and Civil Engineering, Novosibirsk, Russia
Novosibirsk State Technical University, Novosibirsk, Russia
Pages: 507-514


Laminar-turbulent transition in a boundary layer of low-aspect-ratio wing was investigated. Experiments clarifying the flow structure, its mean and oscillatory characteristics were carried out accompanied by linear stability analysis of the wind tunnel data on the laminar flow velocity profiles. Theoretical results obtained in a parallel flow approximation are in a good agreement with the experimental data on disturbances evolution at the initial stage of transition to turbulence.