Abstract

The spatial development of localized disturbances generated by three-dimensional vibrating surface in the Blasius boundary layer at critical Reynolds numbers was investigated. The experimental study is shown that the large amplitude of three-dimensional surface vibration leads to the formation of two types of disturbances in the boundary layer: wave packets and longitudinal localized structures. Downstream development of the high frequency oscillations of the wave packets at the central frequency is consistent with the linear theory of hydrodynamic stability.

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