Study of Cavitation Bubbles Evolution for High Speed Water-Lubricated Spiral Groove Thrust Bearings

[+] Author and Article Information
Xiaohui Lin

Southeast road 2#, Jiangning District Nanjing, jiangsu 211189 China lxh60@seu.edu.cn

Ruiqi Wang

Southeast University Nanjing, Jiangsu 211189 China 220160299@seu.edu.cn

Shaowen Zhang

Southeast University Nanjing, Jiangsu 211189 China Shaowen2004@163.com

Chibin Zhang

Jiulonghu campus Nanjing, 211189 China chibinchang@aliyun.com

Shuyun Jiang

Southeast Road 2#, Jiangning District, Nanjing, China Nanjing, Jiangsu 211189 China jiangshy@seu.edu.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received July 24, 2018; final manuscript received January 15, 2019; published online xx xx, xxxx. Assoc. Editor: Bart Raeymaekers.

ASME doi:10.1115/1.4042760 History: Received July 24, 2018; Accepted January 15, 2019


The purpose of this study is to investigate cavitation bubbles evolution for the high speed water-lubricated spiral groove thrust bearing. A theoretical model of cavitation bubbles evolution considering multiple effects (interface, breakage and coalescence of bubbles) was established for the bearing. A high-speed experimental setup was developed to measure the bubbles distribution. The theoretical model is verified by the experimental data. The results show that the Boltzmann-type bubble transport equation can be used to describe the bubbles evolution of the bearing under the breakup and coalescence at high-speed conditions; the volume of the bubble group presents a skewed distribution in equilibrium; the number of small-sized bubbles is greater than that of large-sized bubbles at high rotational speed; the bubbles are mainly distributed at the inlets and outlets of spiral grooves; the bubble number density increases with the groove depth and spiral angle; more bubbles are generated near the outer diameter of the bearing. The study provides a theoretical and experimental basis for the bubbles evolution of the water-lubricated spiral groove bearing under high speeds.

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