极端条件下雷诺方程控制界面系数算法研究  

Analysis on the coefficients of the control interfaces for solving Reynolds equation in extreme conditions

作　　者：王红志[1,2] 黄平[3] 

机构地区：[1]深圳大学机电与控制工程学院 [2]华南理工大学机械工程学院,广州510640 [3]华南理工大学机械工程学院

出　　处：《深圳大学学报（理工版）》2008年第3期271-275,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：国家重点基础研究发展规划资助项目(2003CB716205)

摘　　要：针对硬盘磁头气体轴承膜和轴承面问题,研究在大间隙比及大轴承数等条件下,求解可压缩气体雷诺方程时,对流系数和扩散系数对控制体积界面的影响.将一维雷诺方程扩展到二维问题上求解.结果表明,扩散系数突变时仅采用算术平均法难以得到正确结果;而选取适当的节点数,采用平均法求界面对流系数可简化数值计算,求解控制界面扩散系数可采用调和平均法.该结论在二维磁头润滑计算中得到验证.For the hard disk drives, head air bearings are characterized by their big bearing numbers and big clearance ratios. Under extreme conditions, the convection and diffusion coefficients between nodes must be estimated for numerically solving gas pressure with finite volume method. The performances of interface convection and diffusion coefficients were compared according to the analytical results and numerical results of the one-dimensional Reynolds equation. The primary conclusions were introduced into two-dimension question. It is shown that convection coefficient calculated by the arithmetic mean of neighbor nodes, which will simplify the data expression to some extent, can give the real result as the grids are dense enough. However, the similar manner cannot fit to the diffusion coefficient, or it may lead a difference from analytical result. The scheme employing harmonic mean of values on the neighboring grid points was proved to be valid in the extreme conditions. These conclusions were effectively extended into the two-dimension question of the head lubrication calculation.

关 键 词：雷诺方程 控制体积法 气体润滑轴承 磁头 大轴承数 大间隙比 

分 类 号：TH117.2[机械工程—机械设计及理论] TP391.9[自动化与计算机技术—计算机应用技术]