THE GASDYNAMICAL ANALYSIS OF GAS-LUBRICATED SLIDER BEARINGS UNDER HIGH KNUDSEN NUMBER CONDITIONS
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摘要: 采用有限差分法对广义润滑方程进行数值求解,计算出计算机磁头滑块压强场的分布情况。分析、研究了其稳态和动态气动力特性,并将计算结果分别与求解一阶、二阶修正雷诺方程所得到的结果进行了比较,得到如下三个结论:(1)当飞行高度很小,飞行速度较低时,必须采用广义润滑方程进行磁头滑块的气动力计算,(2)与广义润滑方程结果比较,求解一阶修正雷诺方程所得到的计算结果总是偏高,而求解二阶修正雷诺方程所得到的计算结果总是偏低。此外,还解决了大压缩数下数值失稳问题,使得压缩数可以计算到120万,足以适应任何实际工程的需要。Abstract: A generalized lubrication equation derived from a linearized Boltzmann equation is solved by finite difference method in this paper, and the results of static characteristics and dynamic characteristics are also given Numerical analysis of the equation for high Knudsen numbers reveals three principal resul s First, a generalized lubrication equation must be used for ultra-thin gas film aod low velocity. Second, the modified Reynolds equation featuring the first-order velocity slip boundary condition overest...
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