摘要
在N-S方程的基础上,考虑微尺度效应对干气密封内部流动的影响,推导出T型槽内气体稳态流场的非线性运动方程.应用有限差分思想,将非线性偏微分方程通过迭代增量线性化方法转化为线性代数方程组,通过迭代进行数值求解,获得T型槽内气体的速度分布和压力分布,近似求得不同气膜厚度时T型槽内气体泄露量和开启力分布.计算结果和其他文献中的实验结果基本符合,证明该理论分析方法在干气密封系统优化设计的可行性.
Based on Navier-Stokes equation and considering the effect of micro-scale flow on the interior flow field in dry gas seals a nonlinear motion equation was derived for a stationary flow field in T-groove. By using finite-difference method, the nonlinear partial differential equation was transformed into the linear algebraic equation group by iterative increment linearization method. The pressure distribution and velocity field in T-groove dry gas seal was obtained with numerical calculation. The approximate gas leakage and opening force distribution were determined for different gas film thickness. The evaluation result was basically consistent with that of experiments listed in literatures available, verifying the feasibility of this theoretical analysis method for the optimum design of dry gas sealing system.
出处
《兰州理工大学学报》
CAS
北大核心
2009年第5期42-46,共5页
Journal of Lanzhou University of Technology
基金
甘肃省自然科学基金(ZSO-A25-021-G)
关键词
T型槽
干气密封
微槽流动
数值计算
性能
T-groove
dry gas seal
micro-channel flow
numerical calculation
performance
