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EXPERIMENTAL INVESTIGATION OF EFFECT OF ULTRASONICALLY ABSORPTIVE COATING LENGTH ON SECOND MODE DISTURBANCES IN HYPERSONIC BOUNDARY LAYER

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Experimental investigation about second mode disturbances in hypersonic boundary layer on a cone with different length of ultrasonically absorptive coating (UAC) is carried out at M∞ = 5.8. For the first time it is shown that UAC could both stabilize and destabilize second mode disturbances. Lengths range of UAC with maximum efficiency of passive porous coating is found.

Author(s):

Sergey Lukashevich    
ITAM
Russian Federation

Sergey Morozov    
ITAM
Russian Federation

Aleksandr Shiplyuk    
ITAM