Abstract
This paper deals with an experimental study of active feedback control of one dimensional leakage-flow-induced vibration. We proposed the non-contact active feedback control method by flow injection and suction from slits. This control method has two suppression effects, the one is caused by flow control and the other is caused by changing the pressure in the passage. For the flow control at inlet, the vibration is efficiently suppressed when the phase-shift, which is between vibration displacement and flow injection from the slit, is positive. For flow control at the outlet, the vibration is suppressed when the phase-shift is negative. In the case of narrower gap, the vibration is suppressed by the changing the pressure in the passage when the phase-shift is negative. The vibration is effectively suppressed in the case of outlet control with horizontal slit.
