排灌机械工程学报2013，Vol.31Issue(2)：123-127,5.DOI:10.3969/j.issn.1674-8530.2013.02.007
载荷分布规律对混流泵叶轮设计的影响
Influences of blade loading distribution law on design of mixed-flow pump impeller
摘要
Abstract
Based on three-dimensional inverse design theory, the meridional gradient of circulation vur was adopted as control parameter of blade loading distributions. Two parabolic curves were proposed to describe blade loading distributions along meridional streamlines. In order to analyze influences of blade loading distributions on design of mixed-flow pump impellers, three impellers respectively with fore-loaded, mid-loaded and aft-loaded blade loading distributions were designed. Based on the RANS equations, SST turbulence model and multiple-reference-frame model, flow fields of the impellers were simulated and the impeller performances and blade surface pressure distributions were analyzed. The results show that it's practicable to apply two parabolic curves to describe blade loading distributions. Three-dimensional inverse design theory with adjustable blade loading distributions can effectively control pressure distributions on blade surfaces. As the location of blade loading peak approaches leading edges, impellers performances of head, power and efficiency all increase. At the design flow rate, differences of head, power and efficiency between fore-loaded impellers and aft-loaded impellers are 18.3% , 16.4% and 2.01% respectively. With different loading distributions, differences of three impeller performances are gradually obvious as flow rate increases.关键词
混流泵/叶轮/载荷/分布规律/数值模拟Key words
mixed-flow pump/impeller/blade loading/distribution law/numerical simulation分类
农业科技引用本文复制引用
常书平,王永生,靳栓宝,苏永生..载荷分布规律对混流泵叶轮设计的影响[J].排灌机械工程学报,2013,31(2):123-127,5.基金项目
国家自然科学基金资助项目(51009142) （51009142）
