排灌机械工程学报Issue(1)：55-60,6.DOI:10.3969/j.issn.1674-8530.14.0076
边界滑移对螺旋槽上游泵送机械密封性能的影响
Effects of boundary slip on performance of upstream pumping mechanical seal
摘要
Abstract
To study effects of boundary slip on performance of upstream pumping mechanical seal,the geometric and computational models of fluid film are built.The Navier -Stokes equations of the fluid film flow are solved in Fluent by employing SIMPLEC algorithm and finite volume method.The boun-dary conditions are modified with the Navier linear slip model and the effects of boundary slip on the film pressure distribution,opening force,friction torque and fluid leakage are analyzed.The results show that the slip velocity has a greater influence than the location of slip occurrence.When the slip velocity is tinier,the results of simulation are almost the same as the data without slip,indicating the non-slip assumption for macro flow of a fluid is reasonable.However,when the slip is larger,the dy-namic effect of fluid film is weakened and the opening force,friction torque and fluid leakage are de-creased with the increasing slip velocity.Additionally,the reduction in both friction torque and lea-kage is more significant than that in opening force.If the opening force is smaller,the boundary slip should be avoided.If the opening force is large enough,the boundaries should be made super hydro-phobic to introduce boundary slip effect so as to reduce the friction torque,eventually to save energy consumption.The results are useful to the design of an upstream pumping mechanical seal.关键词
上游泵送/机械密封/边界滑移/开启力/摩擦扭矩Key words
upstream pumping/mechanical seals/boundary slip/opening force/friction torque分类
农业科技引用本文复制引用
陈汇龙,徐成,胡吉,刘志斌,赵斌娟,李述林..边界滑移对螺旋槽上游泵送机械密封性能的影响[J].排灌机械工程学报,2015,(1):55-60,6.基金项目
国家自然科学基金资助项目（51279067）；航空科学基金资助项目 （）
