Experimental study on hydrodynamic effect of orientation micro-pored surfaces  

作　　者：BAI ShaoXian1,2, PENG XuDong1,2, LI JiYun1,2 & MENG XiangKai1,2 1College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310032, China 2Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education, Zhejiang University of Technology, Hangzhou 310032, China 

出　　处：《Science China(Technological Sciences)》2011年第3期659-662,共4页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 50805130, 50775206);the Zhejiang Nature Science Foundation of China (Grant Nos. Y1090620, R1090833);the Tribology Science Fund of State Key Laboratory of Tribology of China (Grant No. SKLTKF08B01);the Program of Young Leaders and Core Instructors of Disciplines in Science of Zhejiang University of Technology (Grant No. 102004829)

摘　　要：The orientation of the dimple increases the flow distance in the dimple and produces fluid cumulative effect in the dimple length direction, which leads to obvious hydrodynamic effect as a result. In order to investigate the hydrodynamic effect of orientation dimples, a series of experiments was carried out on a ring-on-ring test. Multi-pored faces were tested with different dimple inclination angles and slender ratios. Film thickness and frictional torque were measured under different conditions of load and rotation speed. Experimental results showed that the orientation dimple could produce obvious dynamic effect by change of the flow direction and the increasing dimple orientation leads to increase of the load capability. The hydrodynamic effect strongly depends on dimple orientation parameters such as inclination angle and slender ratio. A larger load capability can be available by increasing dimple orientation and rotation speed. Experimental results agreed well with the theory that orientation micro-pores can significantly improve hydrodynamic performance of surfaces.

关 键 词：orientation micro-pore multi-pored face hydrodynamic effect 

分 类 号：O35[理学—流体力学]