N the mechanisms of interaction of controlled disturbances in the longitudinal wake region in a supersonic boundary layer on a flat plate
A.D. Kosinov, N.V. Semionov, M.V. Piterimova, A.A. Yatskikh, Yu.G. Yermolaev, B.V. Smorodskii, A.V. Shmakova
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: supersonic boundary layer, N-wave, controlled disturbances, longitudinal wake, flat plate, hot-wire anemometry, wave characteristics
Abstract
The present study is aimed at searching for mechanisms of wave interaction in a supersonic boundary layer on a flat plate with the flow being distorted by a streamwise disturbance generated on a sharp leading edge by a pair of weak shock waves. The space and time distributions and the frequency-wave spectra of oscillations and their wave characteristics in the linear and weakly nonlinear phases of wave train development in a nonhomogeneous boundary layer under conditions of a fixed power of the local source of controlled disturbances are analyzed. Based on experimental results, possible variants of wave interaction in a supersonic boundary layer on a flat plate in the region of the longitudinal wake generated by an N-wave are proposed.
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