排灌机械工程学报2012，Vol.30Issue(6)：646-649,676,5.DOI:10.3969/j.issn.1674-8530.2012.06.006
若干因素对导叶式混流泵水力性能的影响
Effects of some factors on hydraulic performance of mixed-flow pump with guide vanes
摘要
Abstract
In order to improve hydraulic performance of a mixed-flow 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 12. 0 software were used to simulate the internal flow fields of the pump by means of multi-block structured meshes. The results showed that the head, shaft-power 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 mixed-flow pump with guide vanes.关键词
混流泵/叶顶间隙/安放角/叶片数/厚度Key words
mixed-flow pump/tip clearance/blade angle/blade number/thickness分类
农业科技引用本文复制引用
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):646-649,676,5.基金项目
国家自然科学基金资助项目(51009142) （51009142）
