翼フラッタの音波によるアクティブコントロール : 第2報,低周波数翼列フラッタへの適用,翼端壁面に音源を配置した場合(流体工学,流体機械)

概要

論文の詳細を見る
The paper presents theoretical and experimental studies to investigate how one can control and suppress cascade flutter through an acoustic excitation. The model considered herein is a three-dimentional linear cascade of flat plates oscillating in a low speed flow between parallel walls. An actuator consisting of loudspeakers is set on a wind tunnel wall at the blades tip side, and generates sound waves with the same frequency of the blade vibration. To determine the most suppressive condition, the dependence of the suppression effect on the width, location of actuator surface and phase difference between the blades and actuator is investigated. Experimental results show that the loudspeakers can work most effectively when the centerline of the actuator surface is located at three-quarters chord point from the leading edge of blades. Furthermore an 8% increase in the critical flutter velocity of 5.3Hz coupled bending-torsion flutter is obtained.
社団法人日本機械学会の論文
2004-03-25