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- W2118947407 abstract "We propose a closed-loop control algorithm for vortex shedding in a separated difiuser. We introduce pulses of zero-net-mass injection (consecutive blowing and suction) together with an inverse vortex imaging method. This method estimates the circulation of a vortex in the separated region based on pressure at a limited number of observer points at the wall. The closed-loop algorithm determines when to start the pulse so that the vortex is pinched ofi with a size which minimizes the stagnation pressure loss. We examine the proposed method in a simplifled ∞ow by performing direct numerical simulations of two-dimensional difiusers. In order to investigate the robustness of the closed-loop control algorithm, we impose high frequency acoustic disturbance upstream of the separation point. The disturbances signiflcantly reduce the efiectiveness of open-loop control compared to the case where no external disturbances are added. By using closed-loop control, however, performance is once again substantially recovered in the presence of disturbances." @default.
- W2118947407 created "2016-06-24" @default.
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- W2118947407 date "2004-01-05" @default.
- W2118947407 modified "2023-10-16" @default.
- W2118947407 title "Closed-loop Control of Vortex Shedding in a Separated Diffuser Using an Inverse Method" @default.
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- W2118947407 doi "https://doi.org/10.2514/6.2004-577" @default.
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