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research-article

Thermohydrodynamic Analysis of High Speed Water-Lubricated Spiral Groove Thrust Bearing using Cavitating Flow Model

[+] Author and Article Information
Xiaohui Lin

School of Mechanical Engineering, Southeast University, Southeast Road, Jiangning District, Nanjing, 211189, China
lxh60@seu.edu.cn

Shuyun Jiang

Professor, School of Mechanical Engineering, Southeast University, Southeast Road, Jiangning District, Nanjing, 211189, China
jiangshy@seu.edu.cn

Chibin Zhang

School of Mechanical Engineering, Southeast University, Southeast Road, Jiangning District, Nanjing, 211189, China
chibinchang@aliyun.com

Xiang Liu

School of Mechanical Engineering, Southeast University, Nanjing 211189, China
liuxianggreat@foxmail.com

1Corresponding author.

ASME doi:10.1115/1.4039959 History: Received November 10, 2017; Revised April 10, 2018

Abstract

A thermohydrodynamic (THD) lubrication model of turbulent cavitating flow for high speed spiral groove thrust bearing was developed considering the effects of cavitation, turbulence, inertia, breakage and coalescence of bubbles. Comparing with the classical THD model, this model can predict not only the distributions of pressure and temperature rise but also the distribution of bubble volume and bubble number density. Static characteristics of the water-lubricated spiral groove thrust bearing in the state of turbulent cavitating flow was analyzed, and the influences of multiple effects on the static characteristics of the bearing were researched. The numerical calculation result shows that the bubbles are mainly distributed inĀ inlet and outletĀ of the spiral groove, the distribution of bubble volume is skewed under the equilibrium state, and small bubbles account for a large proportion of the cavitating flow under high speed condition. Furthermore, the load carrying capacity and the leakage flow of the bearing decrease due to effect of cavitation under high speed. The maximum temperature rise of the bearing decreases due to the effect of cavitation effect.

Copyright (c) 2018 by ASME
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