期刊
PHYSICAL REVIEW FLUIDS
卷 3, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevFluids.3.053903
关键词
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资金
- Airbus [IW202838]
- EPSRC (LFC-UK Programme) [EP/I037946]
- EPSRC [EP/I037946/1, EP/I037938/1, EP/R032467/1] Funding Source: UKRI
The growth of Tollmien-Schlichting (TS) waves is experimentally attenuated using a single-input and single-output (SISO) feedback system, where the TS wave packet is generated by a surface point source in a flat-plate boundary layer. The SISO system consists of a single wall-mounted hot wire as the sensor and a miniature speaker as the actuator. The actuation is achieved through a dual-slot geometry to minimize the cavity near-field effects on the sensor. The experimental setup to generate TS waves or wave packets is very similar to that used by Li and Gas ter [J. Fluid Mech 550, 185 (2006)]. The arm is to investigate the performance of the SISO control system in attenuating single-frequency, two-dimensional disturbances generated by these configurations. The necessary plant models are obtained using system identification, and the controllers are then designed based on the models and implemented in real-time to test their performance. Cancellation of the rms streamwise velocity fluctuation of TS waves is evident over a significant domain.
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