Egorov , Q. Din , A. Fedorov

DOI Number XXX-YYY-ZZZ

Conference Number HiSST 2018-2930950

In the framework of three-dimensional Navier-Stokes equations, the influence of Mach waves (N-wave) on laminar-turbulent transition caused by the first mode in the boundary layer on a flat plate is studied numerically at the free-stream Mach number 2.5. In accord with the wind-tunnel experiment N-wave is induced by two-dimensional roughness on the computational domain boundary corresponding to the test section side wall. It is shown that the disturbance induced in the boundary layer by the N-wave rear front, does not affect the transition onset but it shifts the nonlinear stage of the first mode evolution downstream. The disturbance induced by the N-wave fore front, shifts the transition onset upstream.

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In Categories: Boundary Layer Control, Fluid Dynamics, High-Speed Aerodynamics and Aerothermodynamics, HiSST 2018, Hypersonic Aerodynamics, Turbulence Modeling and Simulation
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