Sergey O. Morozov , Sergey V. Lukashevich , Aleksandr N. Shiplyuk

DOI Number XXX-YYY-ZZZ

Conference Number HiSST 2018_36601057

Under experimental study is the angle of attack influence on the effectiveness of the hypersonic boundary layer stabilization on a cone with the passive porous coating. Experimental investigations are conducted on a 7° half-angle cone with different nose bluntness R = 0.03, 0.5, and 1 mm at the angle of attack under 1°, the Mach number M∞ = 5.8, the unit Reynolds number Re = 6.8∙106 m -1 , and the stagnation temperature T0 = 387 K. The cone generatrix length is 353 mm. The passive porous coating presents a three-layer mesh with the porosity of 44%. One half of the cone, along its generatrix, is partly covered with the passive porous coating within 64 mm, while the other side is solid. Wall pressure disturbances are measured on the surface with the porous coating and solid surface. It is shown that the boundary layer on the windward side becomes more stable, and less stable on the leeward side comparing with the zero angle of attack. The passive porous coating effectively suppresses the most unstable second-mode disturbances in the hypersonic boundary layer both on the leeward and windward sides of the cone with different nose bluntness.

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In Categories: Boundary Layer Control, High-Speed Aerodynamics and Aerothermodynamics, HiSST 2018, Hypersonic Aerodynamics, Materials and Structures
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