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- W3090929049 abstract "Shockwave/turbulent boundary layer interaction on flat plate are investigated by using direct numerical simulation at different wall temperature of Tw/Tr=0.5,1.0,2.0 respectively. Responses of skin friction, velocity profile and root mean square velocity profile are examined. Analysis on velocity profiles indicate that streamwise velocity in the outer part of boundary layer experiences a reduction with wall temperature going up. Skin friction decreases while wall is heating mainly caused by a lower velocity gradient near the wall at a high temperature. A lower skin friction on high wall temperature results in a stronger separation. The comparison of root mean square velocity profile shows turbulent kinetic energy is augmented on a heating wall. The maximum value moves closer to the wall with wall temperature increasing. The scale of separation bubble is amplified with wall temperature increasing. Near-wall streaks become unstable and get an increment in spanwise distance. The process of near-wall strip vortices evolving to complicated 3-dimonsional structures is accelerated and amplified in a high wall temperature. Counter-rotating vortex in reattachment process is evaluated in the three cases. The scale of such vortex gets larger when wall temperature gets higher. The spanwise distance between counter-rotating vortices rises obviously and break down to smaller coherent structures quicker." @default.
- W3090929049 created "2020-10-08" @default.
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- W3090929049 date "2021-01-01" @default.
- W3090929049 modified "2023-10-16" @default.
- W3090929049 title "Wall temperature effects on shock wave/turbulent boundary layer interaction via direct numerical simulation" @default.
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- W3090929049 doi "https://doi.org/10.1016/j.actaastro.2020.08.042" @default.
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