Generation of perturbations by a localized vibrator in the boundary layer of a nonswept wing
Journal article, 2001

Origination and development of perturbations generated by a three-dimensional vibrating surface in the boundary layer on an airfoil with a zero sweep angle is experimentally studied. Surface vibrations were generated by a three-dimensional membrane. It is shown that high-amplitude vibrations of a three-dimensional surface lead to simultaneous formation of two types of perturbations in the boundary layer: quasi-stationary streamwise structures and wave packets accompanying them. The presence of regions with favourable and adverse pressure gradients does not exert a significant effect on evolution of streamwise structures but leads first to attenuation and then to amplification of wave packets.


Valery Chernoray

Chalmers, Applied Mechanics

A. Spiridonov

M. Katasonov

V. Kozlov

Journal of Applied Mechanics and Technical Physics

Vol. 42 5 765-772

Subject Categories

Fluid Mechanics and Acoustics

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