Adverse pressure gradient effect on nonlinear varicose instability of a streaky structure in an unswept wing boundary layer
Journal article, 2005

Nonlinear varicose instability of a streaky structure is experimentally investigated in a wing boundary layer. Spatial evolution of the streaky structure perturbed by high-frequency traveling waves is compared at zero and adverse streamwise pressure gradients. The process of streak multiplication and generation of ?-shaped vortices is under examination. Results obtained testify to the strong influence of pressure gradient upon the breakdown of the streaky structure due to its varicose instability.


Yu.A. Litvinenko

Valery Chernoray

Chalmers, Applied Mechanics

V.V. Kozlov

G.R. Grek

Lennart Löfdahl

Chalmers, Applied Mechanics

H.H. Chun

Physics of Fluids

Vol. 17

Subject Categories

Fluid Mechanics and Acoustics

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