Diffraction phenomena during the incident of a pair of weak shock waves on the leading edge of a flat plate model at supersonic free-flow velocities
L.V. Afanasyev, A.A. Yatskikh, A.D. Kosinov, Yu.G. Ermolaev, E.D. Karlova
S.A. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: boundary layer, correlation measurements, diffraction, N-wave
Abstract
The article presents the results of hot-wire measurements of the free-flow and boundary layer of a flat plate with a blunt leading edge, in the presence of an N-wave disturbance source. Based on the measurements, estimates of the cross-correlation characteristics were obtained. Based on the distribution of the mutual phases, conclusions were drawn regarding the presence of diffraction phenomena of free-flow pulsations. It is shown that, in contrast to the case with a sharp leading edge, in the case of a blunt leading edge it is not possible to reliably determine the presence of diffraction phenomena.
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