FIV2018 Paper Management System, FIV2018 Conference

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Experimental investigation of vibrations induced by cavitating flows around a 3D hydrofoil with tip clearance
Yu Zhao, Jian Zhang, Jing Wang, Xiaolong Cao

Last modified: 2018-05-16

Abstract


Experimental investigations of the cavitation-induced vibrations and the correlations with the flow patterns are taken. The experiment is conducted in a closed-loop cavitation tunnel. Both the high speed camera system and the dynamic strain gauge based vibration measurement system are utilized to capture the cavitation patterns and the vibration. Based on the experimental results following conclusions can be drawn. Firstly, in the case with relatively large cavitation number, the dominating frequency of the hydrofoil is about 160Hz and changes slightly compared with that in fully wetted case. This implies the stable leading edge cavity has little effect on the vibration. Secondly, in the case with relatively small cavitation number, the dominating frequency is about 20Hz and quite different from that in fully wetted case. The unsteady shedding process of the leading edge cavity is the main reason.


Keywords


cloud cavitaton; flow induced vibration; tip clearance

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