대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제26권9호
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  • Pages.1234-1240
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  • 2002
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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주기적 회전을 이용한 원봉 후류의 되먹임 제어

Feedback Control of a Circular Cylinder Wake with Rotational Oscillation

  • 발행 : 2002.09.01
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초록

A new feedback control law is proposed and tested for suppressing the vortex shedding from a circular cylinder in a uniform flow. The lift coefficient ( $C_{L}$) is employed as a feedback control signal and the control forcing is given by a rotational oscillation of the cylinder. The influence of the feedback transfer function on the $C_{L}$ reduction is examined. The main rationale of the feedback control is that a feedback control forcing is imposed at a phase which is located outside the range of lock-on. By applying the feedback control law, $C_{L}$ is reduced significantly. Furthermore, the reduction mechanism of $C_{L}$ is analyzed by showing the vortex formation modes with respect to the forcing phase.e.ase.e.

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참고문헌

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