Active control of the flow behind a two-dimensional bluff body in ground proximity

作者：Chaligne Sebastien^*; Castelain Thomas; Michard Marc; Juve Daniel

来源：Comptes Rendus Mecanique, 2013, 341(3): 289-297.

DOI：10.1016/j.crme.2012.10.043

• Fluid mechanics
• Flow control
• Unsteady wake flow
• Particle image velocimetry

Active flow control around a two-dimensional geometry positioned near the ground is experimentally studied. Results for two model configurations are reported: one square-back and the other with a flap added at the rear-corner. The model rear end static pressure and the near-wake flow properties are derived from wall-pressure measurements, high-speed Particle Image Velocimetry acquisitions and hot-wire anemometry. The control flow is obtained from a pulsed jet system driven in open loop. The study aims at distinguishing the individual influence of the passive flap and the control system. The actuation frequency is shown to be a determining parameter regarding rear end pressure increase.

• 出版日期2013-3