摘要
分别求出了磁液动密封中磁液和被密封液体的速度分布,特别是磁液作为非牛顿流体运动方程的解,并计算了两相液体界面的速度差。阐述了磁液密封液体的界面稳定性分析方法,并根据运动流体的Kelvin-Helmholtz界面稳定性分析模型求得磁液与被密封液体之间界面的稳定性判据及参数的临界值,讨论了影响磁液动密封的液-液界面稳定性的主要因素。两相液体界面稳定性分析的这一近似处理方法很好地说明了界面不稳定是导致磁液密封液体中磁液流失、密封失效的一个重要原因。
It was deduced respectively the speed distributions of both magnetic liquid and sealed liquid in magnetic liquid dynamic seal, especially the motion equation＇s solution of the magnetic liquid if it is considered a non-newtonian fluid, and computes the speed differences of two- phase liquid interface. It describes the method of interfacial stability analysis for sealing liquids by the magnetic liquid, and determines the stability criterion and critical parameter values of the interface Between the magnetic liquid and the sealed liquid by the analytical model of kelvin-helmhohz stability of interface between moving liquids. Also it discusses the main factors of influencing the liquid-liquid interface stability in the magnetic liquid dynamic seal. The approximate method of the interface stability analysis makes a Better explanation of which the interfaeial instability is an important reason for resulting of magnetic liquid loss and seal failure in sealing liquids by the magnetic liquid.
出处
《流体机械》
CSCD
北大核心
2008年第12期21-23,20,共4页
Fluid Machinery
关键词
磁液动密封
速度差
液-液界面
稳定性判据
magnetic liquid dynamic seal
speed difference
liquid-liquid interface
stability criterion
