摘要
基于质量守恒边界条件,建立了径向直线槽端面密封空化特性的数值模型.控制方程为考虑惯性的定常不可压缩Reynolds方程,利用有限控制体积法对其进行离散,采用分块加权方法计算膜厚突变处流量,迭代方法为Gauss-Siedel松弛迭代,并对空化特性影响因素进行了分析.结果表明:不同工况下,油膜破裂位置均在膜厚突然增大处,密封坝阻碍空化的产生;空穴区域随着转速的增大而增大,随着槽深的增大而减小;空化区域在径向由静压决定,周向由动压决定,二者对空化的影响相互独立.
Based on the mass conserving boundary condition,a numerical model for cavitation of radial grooved face seals was developed.To achieve the objectives the steady,incompressible,polar coordinate Reynolds equation,including centrifugal effects and the cavitation,was discretized using the control volume finite method and solved numerically by Gauss-Siedel relaxation iterative.The block-weight approach was implemented to deal with non-coincidence of mesh and radial groove pattern in numerical method.The model was used to investigate the effects of working condition and structural parameters on cavitation area.The results indicate that rupture of oil film located where the thickness increased,and the seal dam could prevent cavitation.Cavitated area increased with the increment of rotary speed,by contraries,cavitated area decreased with the increment of groove depth.Cavitated area was dependent on hydrostatic and hydrodynamic effects in radial and circumferential direction.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2011年第6期551-556,共6页
Tribology
基金
国家部委基础科研项目(A2220060029)资助~~
关键词
空化
质量守恒边界条件
有限控制体积法
径向直线槽端面密封
cavitation
mass conserving boundary condition
control volume finite method
radial grooved face seal
