Characteristics of Wave Motion and Analysis of Stabilization Effect on an Elastic Wall Adjoined by Vortex Layer

Abstract

Characteristics of wave motion on an elastic wall adjoined by one or two vortex layers which appear freqently in a flow of high Reynolds number were solved by a numerical calculation. The following matters are clarified. (1) A coupled system comprising the vortex layer and the elastic wall becomes stable as the distance between the vortex layer and the elastic wall decreases in a case where virtual mass ratio is large. (2) Stable waves on the elastic wall become unstable for a jet-type velocity distribution, and unstable waves on the elastic wall become stable for a wake-type velocity distribution, as the distance decreases in the above case.