Bubble Collapse Behavior and Pressure Wave Propagation due to Bubble Miniaturization in Venturi Tube

Abstract

This paper describes experiments in which visualization measurement and pressure measurement are performed in synchronization with propagation of pressure wave generated in a venturi tube. A pressure wave is generated under the condition how speed reaches at the throat. As the gas flow rate increases, the pressure wave becomes stronger, and the occurrence frequency decreases. When it is further increased, no pressure wave is generated. Also, as the bubble collapse position transits to the downstream side. A pressure wave is generated and propagated due to the bubble collapses. It is suggested that propagating pressure waves can be predicted using an adiabatic homogeneous flow model.