Abstract: In order to improve hydraulic performance of a mixedflow pump with guide vanes, effects of several factors such as tip clearance, number of blades, blade angle and blade thickness on the performance were explored numerically. The SST turbulence model and SIMPLEC algorithm in the Ansys CFX 120 software were used to simulate the internal flow fields of the pump by means of multiblock structured meshes. The results showed that the head, shaftpower and efficiency are declined with increasing tip clearance. The head and power show gradually less increase with increasing number of blades and too many blades or too few blades are all unfavorable to pump efficiency. The changes in both head and power caused from a variable blade stagger angle become dominated with increased flow rate, suggesting the best efficiency point location and the shape of the efficiency curve are adjustable by altering the angle. The best efficiency point is moved to a high flow rate and the slightly increased peak efficiency is observed with decreasing maximum blade thickness. Under the premise of meeting manufacturing process and installation requirements, those factors optimally chosen can improve hydraulic performance of a mixedflow pump with guide vanes.
常书平, 王永生, 苏永生. 若干因素对导叶式混流泵水力性能的影响[J]. 排灌机械工程学报, 2012, 30(6): 646-649.
CHANG Shu-Ping, Wang-Yong-Sheng, Su-Yong-Sheng. Effects of some factors on hydraulic performance of mixedflow pump with guide vanes. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(6): 646-649.
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