Active Control of Sheet Flutter by Using Injection and Suction of Fluid from Nozzles

(Influences of Number and Arrangements of Nozzles on Suppression Performance)

Abstract

This paper deals with active control to suppress a flow-induced sheet flutter in a spacious passage. The sheet flutter is suppressed by using injection and suction air flow which are formed through the nozzles. To show the validity of this method, the suppression performance is experimentally examined and evaluated from the increase rate of the flutter velocity with control as compared to it without control. The influences of the number and the arrangements of nozzles on suppression performance are discussed based on the visualized air flow patterns around the sheet and the nozzles with control.