Direct numerical simulation of the transition to turbulence in a supersonic boundary layer on smooth and rough surfaces


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Direct numerical simulations of instability development and transition to turbulence in a supersonic boundary layer on a flat plate are performed. The computations are carried out for moderate supersonic (free-stream Mach number M = 2) and hypersonic (M = 6) velocities. The boundary layer development is simulated, which includes the stages of linear growth of disturbances, their nonlinear interaction, stochastization, and turbulent flow formation. A laminar–turbulent transition initiated by distributed roughness of the plate surface at the Mach number M = 2 is also considered.

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D. Khotyanovsky

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch

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Email: khotyanovsky@itam.nsc.ru
俄罗斯联邦, Novosibirsk, 630090

A. Kudryavtsev

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch

Email: khotyanovsky@itam.nsc.ru
俄罗斯联邦, Novosibirsk, 630090

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