滑动轴承油膜从层流到紊流过渡区域的研究

作为对滑动轴承油膜从层流到紊流过渡区域的研究,本文采用原始变量,应用解决三维抛物型流动的思想方法,分别求解Navier-Stokes方程组中周向(主流方向)动量方程和径向、轴向(横截面流动)动量方程,计算了同心圆柱轴承油膜在超层流工况下Taylor涡旋的速度场、压力场,较全面地计算分析了不同间隙比、不同泰勒数、不同波长比对涡旋的影响,并计算了内、外圆柱上的摩擦阻力矩,为进一步解决偏心圆柱轴承的问题准备了条件。

INVESTIGATION ON TRANSITION REGION FROM LAMINAR TO TURBULENT FLOW OF OIL FILM IN JOURNAL BEARING

This paper investigates the transition region from laminar to turbulent flow of the oil film in jour- nal bearing. By means of primitive variables and with the concept for solving three dimensional parabolic flow, the momentum equations in Navier-Stokes equations are solved; the velocity and pres- sure field of Taylor vortex in concentric cylinders of bearing are computed; the effects of clearance ra- tio, Taylor number and wave length ratio are relatively comprehensively analysed; and the frictional moment on the inner and outer cylinder are calculated. Besides, this work lays a foundation for further solving the problem of eccentric cylinders of bearing.