Bruno Auvity, Stéphane Barre, Patrick Braud, Jean-Paul Bonnet
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Étude expérimentale des champs turbulents acoustiques à l'immédiat aval d'une onde de choc
An original measurement technique based on Rayleigh scattering (Collective Light Scattering) was used in the flow conditions of a normal Mach 2.85 shock wave/homogeneous turbulence interaction. The experimental investigation was limited to the region just downstream of the shock. A non-dimensional attenuation law for the evanescent acoustic waves was found using CLS measurements. This law is significantly different from the one predicted by the Linear Interaction Analysis. However, it was confirmed by hot-wire measurements for which quite severe assumptions were used.
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