The Flow Simulation in Three Type High-Speed Centrifugal Impeller
Based on the Navier-Stokes equations and the Spalart-Allmaras turbulence model, three dimensional turbulent flow fields in low-specific-speed high-speed centrifugal impellers with eight blades are simulated numerically and analyzed whose three types are closed ,half-open and open. The relative velocity and pressure distributions are analyzed and compared in the flow channel of three type impellers. It is found that there all exist back flows in three impellers in which the region of back flow of closed impeller is biggest, and the static pressure in impellers rise gradually from its blade inlet to outlet whose contours are almost alone the circumferential orientation. The experiment and simulation results show that the axial clearance of impeller and the back flow in it have important influence on the performance of pump. The experimental results also show that the head coefficient of open impeller and the efficiency of half-open impeller is highest, open impeller centrifugal pump can transport the small-small media.
centrifugal impeller high speed turbulence flow numerical simulation
Cui Baoling Zhu Zuchao Lin Yonggang
Zhejiang Provincial Key Lab of Modern Textile Machinery, Zhejiang Sci-Tech University, Hangzhou 3100 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027,
国际会议
北戴河
英文
450-453
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）