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• W2321845412 abstract "Active Flow Control in the form of steady blowing is used with the aim of reducing the noise generated by high Reynolds number flow over bluff bodies. A Computational Fluid Dynamics solver is used to compute the flow field and provide surface pressure samples to a Ffowcs Williams-Hawkings solver to obtain far-field acoustic pressure signals. Two geometries are considered, a circular cylinder and a main strut and drag-stay configuration with the upstream drag-stay inclined by 25◦ towards the upstream direction. The latter is representative of interaction flow occurring in a landing gear. The steady blowing is applied on the cylinder and drag-stay configurations from a slot located on both sides of the body at ±30◦, measured from the stagnation line. For the drag-stay configuration, blowing at 180◦ is also investigated. In the isolated cylinder configuration, the noise reduction obtained by blowing at ±30◦ is found to be related to a modification of the flow field directly downstream of the cylinder. An increase in the recirculation region length and a reduction of the velocity fluctuations are observed. However, applying the same flow control on the drag-stay configuration results in an increase in the overall noise. Blowing at 180◦ on the drag-stay component results in a maximum reduction of 8.5 dB at the shedding peak frequency for an observer aligned with the lift dipole to the side of the drag-stay configuration. The self-noise of both components and the interaction noise are reduced." @default.
• W2321845412 created "2016-06-24" @default.
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• W2321845412 date "2014-06-13" @default.
• W2321845412 modified "2023-09-27" @default.
• W2321845412 title "Numerical Investigation of Active Flow Control using Steady Blowing for Landing Gear Noise Reduction" @default.
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• W2321845412 doi "https://doi.org/10.2514/6.2014-2893" @default.
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