側壁からの流体吹出しと吸込みによるシートフラッタのアクティブ制振

抄録

This paper presents an active control to suppress a flow-induced sheet flutter in a rectangle passage using fluid suction and blowing. A flexible sheet as a controlled object is supported at only one end in the passage. The sheet flutter is suppressed by the active control using fluid suction and blowing from a loudspeaker. The loud speaker is driven with changing a gain and a phase-shift between the displacement of the sheet and the pressure by fluid suction and blowing. It is indicated experimentally that the proposed control technique suppresses the sheet flutter effectively and increases the critical flow velocity by about 50%.