Abstract A complete thermohydrodynamic lubrication model for pump-out spiral groove thrust bearings (SGTB) with cavitating flow is established based on two-phase flow and transport theory. Various effects (cavitating flow interface effect, convective heat transfer effect, heat conduction effect, inertia effect, breakage and coalescence of bubbles) of water lubricant at high speed are included when modeling. The bubble size distributions, bubble number density of the cavitating flow, and the dynamic coefficients of the SGTB are predicted using this model. The probability distribution of the bubble size, bubble number density, and axial film stiffness coefficient agree with the experimental values. The results show that the number of small-sized bubbles is much larger than the number of large-sized bubbles in cavitating flow. When the SGTB has a specified spiral angle, the direct stiffness coefficients increase and the cross-stiffness coefficients decrease due to the cavitation effect, but the influence of the cavitation effect on the damping coefficient is not obvious.

中文翻译：

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高速水润滑泵出螺旋槽轴承空化流热流体力学模型及动态特性计算

摘要 基于两相流和输运理论，建立了空化流泵送螺旋槽推力轴承（SGTB）的完整热流体动力润滑模型。建模时考虑了水润滑剂在高速下的各种效应（空化流动界面效应、对流传热效应、热传导效应、惯性效应、气泡的破裂和聚结）。使用该模型预测空化流的气泡尺寸分布、气泡数密度和SGTB的动态系数。气泡大小、气泡数密度和轴向膜刚度系数的概率分布与实验值一致。结果表明，空化流中小气泡的数量远大于大气泡的数量。