摘要
在高速转轴磁流体密封流场分析中 ,由于楔隙内速度线性假设法不能满足流体运动Navier Stokes方程 ,给动密封的分析带来了计算误差 ,为此提出了流体边界速度线性假设和延伸控制体法两种对速度不同的求解方法 .在磁场法分析的基础上 ,通过数值方法对Navier Stokes方程进行求解 ,弥补了楔隙内速度线性假设法的缺陷 .分析计算结果表明 ,在低转速下 ,3种方法的计算结果非常接近 ;在高转速下 ,楔隙内速度线性假设法计算结果偏高 ,而两种新算法的结果仍保持一致 .
The hypothesis of velocity linear distribution in wedge-shaped gap is often used to analyze the fluid field in high speed magnetic seal. But the result can not satisfy Navier-Stokes equation completely. So, two methods are proposed to deal with the problem. One is based on the hypothesis of linear distribution of magnetic fluid velocity on the boundary, the other solves Navier-Stocks equation by extending control region in analysis. All data are get by numerical calculation based on magnetic field method analysis. The results show that the velocity distribution derived by new methods can satisfy all the kinematics equations. The results obtained by the two new methods are very close in any case, and they are lower than the result obtained by the old method at high speed.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2001年第6期628-631,共4页
Journal of Beijing University of Aeronautics and Astronautics
基金
航天 8 6 3计划资助项目 ( 86 3 2 4 4 7)
关键词
磁流体
密封
流场分析
高速转轴
Flow of fluids
Magnetic fluids
Navier Stokes equations
Numerical analysis
Velocity
