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- W18302531 abstract "Passive control applied to a turbulent shock wave/boundary layer interaction has been investigated by considering a two-dimensional channel flow. The field resulting from application of passive control has been probed in detail by using a two-component LDV system to execute mean velocity and turbulence measurements. Four different perforated plates have been considered, as also the solid wall reference case. The performed measurements have shown that passive control deeply modifies the inviscid flowfield structure, the unique strong shock being replaced by a lambda shock system. This fractionning of the compression induces a substantial reduction of the wave drag associated with the interaction. However, the combined injection-suction effect taking place in the control region provokes an important thickening of the boundary layer. There results an increase of the friction drag which nearly outbalances the gain in wave drag. Also, the rugosity of the holes is an important source of drag (excrescence drag) which contributes to compromise the potential benefit of the passive control technique. The most commonly used turbulence models give poor results, even in the solid wall reference case. On the other hand, the wall transpiration velocity distribution in the control region is well represented by usual laws." @default.
- W18302531 created "2016-06-24" @default.
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- W18302531 date "1997-01-01" @default.
- W18302531 modified "2023-09-27" @default.
- W18302531 title "Basic Study of Passive Control Applied to a Two-dimensional Transonic Interaction" @default.
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- W18302531 doi "https://doi.org/10.1007/978-3-322-90711-0_9" @default.
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