Thermo-elasto-hydrodynamic analysis of a specific multi-layer gas foil thrust bearing under thermal-fluid–solid coupling

作     者：Qihong GAO Wenjing SUN Jingzhou ZHANG Qihong GAO;Wenjing SUN;Jingzhou ZHANG

作者机构：College of Energy and Power EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Thermal Management and Energy Utilization of AircraftNanjing University of Aeronautics and AstronauticsNanjing 210016China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2023年第36卷第12期

页      面：231-246页

核心收录：

学科分类：08[工学] 082501[工学-飞行器设计] 080203[工学-机械设计及理论] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 080201[工学-机械制造及其自动化] 

基　　金：the financial supports provided by the Natural Science Fund of Jiangsu Province,China(No.BK20200448) the Postdoctoral Science Foundation of China(No.2020TQ0143) 

主　　题：Gas foil thrust bearing Thermo-elastohydrodynamic analysis Thermal-fluid–solid coupling simulation Adaptive deformation Structural stiffness 

摘      要：Gas foil bearing faces severe and complex thermal-fluid–solid coupling issues when in ultra-high speed and miniaturized impeller *** this study,a Thermo-Elasto-Hydrodynamic(TEHD)analysis of a specific multi-layer gas foil thrust bearing on the continuous loading process within a steady rotational speed is numerically investigated by a three-dimensional thermal-fluid–solid coupling *** indicate that the multi-layer foil exhibits nonlinear overall stiffness,with the thrust bottom foil serving as the primary elastic deformation structure,while the thrust top foil maintains a well-defined aerodynamic shape during a loading process,which helps reduce frictional damage and achieve an adequate loading *** low loads,the fluctuation of the gas film is extremely sensitive,and it weakens dramatically as the load *** viscous heating and friction torque exhibit a linear relationship with an increasing bearing load after a rapid *** on the exact stacking sequence and contact position of the multi-layer gas foil,the overlapping configuration allows for efficient transfer of viscous-shearing heat accumulated at the smallest air film through thermal conduction while providing elastic *** to the strong inhomogeneity of the viscous heat under varying loads,the temperature distribution on the top foil surface shows pronounced variations,while the difference between the peak and average temperatures of the thrust plate and top foil surfaces widens substantially with an increasing load.