LIANG Liang*, PANG Youxia, TANG Yong, ZHU Zongming, XU Yan

(Department of Mechanical & Electrical Engineering, Changsha University, Changsha 410022, China)

Abstract: Based on the computational fluid dynamics (CFD) method, simulating the working conditions of hydraulic turbine in different rotating speeds, the flow fields (pressure field and fluid concentration distribution) on the rotary table surface are numerically compared under erosive wears and interactive wears. On the rotating wearing experimental device, the interactive erosion and cavitation wearing experiment of three phases are done. The results show that in the process of the erosive wear, when the rotating speed is increased, the pressure is increased. And if the cavitation damage is added, the pressure is further increased and wear is markedly increased. In the process of the interactive wear, the pressure is increased, the cavitation damage region on the rotary table surface moves in the reverse direction from the neighboring region of the cavitation hole, and wear is markedly increased. Numerical simulative air-bubble tracks on the high pressure gradient region are in agreement with the wear scars, and the experimental results and theoretical results are in good agreement.

Key words: erosion; erosion and cavitation; interactive wears; computational fluid dynamics; experimental research

E-mail: faliangliang@126.com 

Tribology, Vol. 32, Issue 4, 2012, 338~344