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New effects in the reattachment region of supersonic laminar separated flow
2nd International Conference on Fluid Dynamics & Aerodynamics
October 19-20, 2017 | Rome, Italy

I I Lipatov, V I Zapryagaev and I N Kavun

Khristianovich Institute of Theoretical and Applied Mechanics, Russia

Posters & Accepted Abstracts: J Appl Mech Eng


This study focuses on flow features of separated supersonic flow. Preliminary studies demonstrated that a near wall region formed downstream of the reattached region of the boundary layer and that the streamlines of the near wall region had an increased total pressure. To study this phenomenon modern data processing and measurement methods were used to reveal a discontinuity region in the boundary layer. A detailed examination of the phenomenon enabled us to formulate an explanation for the appearance of the high pressure jet because of differences between the total pressure losses in different streamlines under conditions of wave system formation. This new result is proved here. In adition, a detailed investigation of the reattached region revealed a vortex structure in the boundary layer with characteristics similar to Taylor Goertler vortices. A detailed analysis demonstrates that the appearance of the vortex structure results from centrifugal forces and their corresponding unsteadiness. The findings described herein were obtained while investigating the flow structure in the reattached region emerging in the laminar flow near a compression corner at a freestream Mach number of M�?? =6.