高压圆盘气体轴承可压缩边界层形态分析

发布时间：2018-06-04 09:24

本文选题：气体轴承 + 可压缩边界层　；参考：《武汉科技大学学报》2017年06期

【摘要】：高压圆盘气体轴承中气流速度高、雷诺数大,气膜内边界层的发展形态对主流和轴承承载力的影响不可忽视。在数值计算方法可行性验证的基础上,采用γ-Reθ转捩模型对具有双对称收缩段结构的高压圆盘气体轴承气膜内的流场进行数值求解,分析气膜间隙、供气压力及轴承半径对气膜边界层的影响。结果表明,减小气膜间隙、降低供气压力、增大轴承半径,均可促进气膜边界层的发展;边界层完全发展后,主流被边界层淹没,边界层内的黏性力作用于气流,气流速度下降,使气膜内的压力维持在较高水平,从而提高了气体轴承的承载能力。根据数值计算结果确定了高压圆盘气体轴承实验模型的工作参数。
[Abstract]:The influence of the development of the inner boundary layer of the gas film on the mainstream and bearing capacity can not be ignored because of the high gas velocity and large Reynolds number in the high pressure disc gas bearing. On the basis of the feasibility verification of the numerical calculation method, the flow field in the gas film of the high pressure disc gas bearing with double symmetrical contraction section is solved numerically by using the 纬 -Re 胃 transition model, and the film clearance is analyzed. The influence of gas supply pressure and bearing radius on the film boundary layer. The results show that the gas film boundary layer can be developed by decreasing the film clearance, reducing the gas supply pressure and increasing the bearing radius, and when the boundary layer is completely developed, the mainstream is submerged by the boundary layer, and the viscous force in the boundary layer acts on the air flow. With the decrease of air velocity, the pressure in the gas film is maintained at a higher level, thus increasing the bearing capacity of the gas bearing. According to the numerical results, the working parameters of the experimental model of high pressure disc gas bearing are determined.
【作者单位】：武汉科技大学冶金装备及其控制教育部重点实验室;武汉科技大学机械传动与制造工程湖北省重点实验室;
【基金】：国家自然科学基金资助项目(51475341)
【分类号】：TH133.3

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