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A fluid-structure-thermal model for bump-type foil thrust bearings

机译:用于凸型箔止推轴承的流体 - 结构热模型

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摘要

This paper presents a multi-physics multi-timescale computational framework for the three-dimensional and two-way coupled fluid-structure-thermal simulation of foil thrust bearings. Individual solvers for the transient fluid flow, structural deformation, heat conduction and the coupling strategy are discussed. Next, heat transfer models of the solid structures within foil thrust bearings are also described in detail. The result is a multi-physics computational framework that can predict the steady state and dynamic performance of foil thrust bearings. Numerical simulations of foil thrust bearings with air and CO2 are then performed. It is found that the centrifugal pumping that naturally occurs in CO2 bearings due to the high fluid density provides a new and effective cooling mechanism for the CO2 bearing.
机译:本文提出了一种多物理多时间尺度计算框架,用于箔止推轴承的三维和双向耦合流体结构 - 热模拟。 讨论了用于瞬态流体流动,结构变形,导热和耦合策略的单独溶剂。 接下来,还详细描述了箔止推轴承内的固体结构的传热模型。 结果是一种多物理计算框架,可以预测箔止推轴承的稳态和动态性能。 然后进行空气和CO2的箔止推轴承的数值模拟。 发现由于高流体密度而自然地发生在CO2轴承中的离心泵为CO 2轴承提供了一种新的和有效的冷却机构。

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