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- W4379796111 abstract "The current work evaluates the effectiveness of two leading-edge dynamic stall criteria in mild to moderately compressible regimes using numerical simulations. The two criteria under consideration, namely, the maximum magnitudes of the leading edge suction parameter (max(LESP)) and boundary enstrophy flux (max(|BEF|)), have previously been found to be effective at signaling dynamic stall in the incompressible regime. Based on unsteady Reynolds-averaged Navier-Stokes simulations at a Reynolds number of 200,000 and freestream Mach numbers between 0.1 - 0.5, we observe that these criteria are directly applicable in the mild to moderately compressible regimes, since they are reached shortly after suction collapse at the leading edge and well in advance of dynamic stall vortex formation for all the cases. This is attributed to compressibility effects promoting adverse-pressure-gradient(APG)-induced stall for the flow conditions considered. For the highest Mach number of 0.5, shock wave interactions with the separated shear layer are observed. It is noted that although compressibility leads to separation at a lower APG, the maximum APG scaled by the local flow density remains in the same range for all the cases." @default.
- W4379796111 created "2023-06-09" @default.
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- W4379796111 date "2023-06-08" @default.
- W4379796111 modified "2023-09-23" @default.
- W4379796111 title "Effects of Compressibility on Leading-Edge Dynamic Stall Criteria" @default.
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- W4379796111 doi "https://doi.org/10.2514/6.2023-3371" @default.
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