Outcomes following single bubble collapse in a rigid tube

9th International Symposium on Cavitation

Ji, C.^1 ; Li, B.^1 ; Lin, F.Y.^1 ; Zou, J.^1

State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou

310027, China^1

关键词: Acoustic pressures;    High speed camera systems;    Pressure pulse;    Single bubbles;    Vapour bubbles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012043/pdf
DOI  :  10.1088/1742-6596/656/1/012043

来源: IOP

【 摘 要 】

Following the collapse of a vapour bubble inside a rigid tube, various outcomes could be caused by the propagation and reflection of the shock wave. Using high-speed camera system and hydrophone, the secondary cavitation and acoustic pressure curve due to the collapse of single bubble in a rigid tube are studied experimentally. The secondary cavitation has a decisive effect on the pressure pulse sequence, which usually appears at a certain area symmetric to the first bubble. Two particular cases of first bubble generated near the midpoint and the endings of the tube are also investigated, where the strength, position and period of the secondary cavitation show different features. The mechanism behind these results are discussed briefly, which is related to the propagation and reflection of the shock wave.