中文摘要：

为避免螺旋槽边界曲线对计算造成的不便,利用坐标变换将螺旋区域变为扇形单元,采用有限体积法得到气体雷诺方程的离散计算式,并将计算结果与已发表的有限差分法、有限元方法及解析算法的计算结果进行对照,验证了本文计算模型和数值方法的正确性.结果表明：当螺旋角在10°到15°之间取值时,承载力可获得最大值;槽深减小,压力增大,摩擦转矩也有一定的增加;压力分布的明显特点是：槽台交界处压力取极值;压缩数高,压力增大,压力梯度大.

英文摘要：

A numerical analysis of lubricated gas spiral groove thrust bearing is presented in this thesis.To avoid the inconvenience of curvilinear boundaries,the coordinate transformation was used to change the spiral groove domain into a sector form.The steady gas Reynolds equations were obtained and solved by finite volume method.The calculation model and numerical algorithm has been validated by comparison of the calculation data with published numerical results from FDM,FEM and analytical method.The results show that the critical load capacity is gained when the spiral angle is in the range of 10° to 15°.With the groove depth decreasing,the load capacity would be increase,however,the friction torque increase to a certain extent.The pressure field of bearing has a few of remarkable features： the largest pressure lies on the ridge-groove boundaries,the pressure gradient gets larger and the pressure is higher with the increase of compressibility number.