排灌机械工程学报2016，Vol.34Issue(6)：461-469,9.DOI:10.3969/j.issn.1674-8530.15.0140
诱导轮偏转角对离心泵叶轮空化性能的影响
Effect of inducer deflection angle on impeller cavitation performance in centrifugal pump
摘要
Abstract
In order to clarify the effect of inducer deflection on cavitation performance of centrifugal pump impeller,improve centrifugal pump cavitation performance,and get the best circumferential po-sition,based on the homogeneous flow assumption,the IDMcavitation model and the RNG k -εtur-bulence model were adopted and six projects which deflections are 0°,10°,20°,30°,40°and 50°were selected,to compare numerical simulation values and experimental values of pump′s external characteri stics and cavitation performances of inducer and impeller.The centrifugal pump characteristic perfor-mance data of different projects were obtained.Calculated NPSHR curves match well with experimental ones,which can verify the accuracy of the calculation methods.Based on numerical simulation results, vapor volume fraction distributions within inducer and impeller blades under various conditions were analyzed.It was found that cavitation bubbles′development processes at different positions are basically the same,but the cavitation rate and vapor volume fraction distribution areas are smaller when the de-flection is 10°,therefore two deflections of 5°and 15°were further selected to do simulation analysis to get more accurate results,i.e.the pump′s overall hydraulic characteristic is the best when the deflec-tion is 5°.关键词
诱导轮/离心泵/偏转角/空化数/数值模拟Key words
inducer/centrifugal pump/deflection/cavitation coefficient/numerical simulation分类
机械制造引用本文复制引用
李仁年,毕祯,黎义斌,肖丽倩..诱导轮偏转角对离心泵叶轮空化性能的影响[J].排灌机械工程学报,2016,34(6):461-469,9.基金项目
国家自然科学基金资助项目（51369015）；甘肃省科技支撑计划项目 （）
