排灌机械工程学报2016，Vol.34Issue(4)：301-306,6.DOI:10.3969/j.issn.1674-8530.15.0097
双流道泵偏工况不同叶轮外径时压力脉动
Effects of impeller diameter on pressure pulsation in double-channel sewage pump under partial conditions
摘要
Abstract
In order to analyze the influence of D2 (101,103 and 105 mm)on pressure pulsation under partial conditions,the unsteady solid -liquid two-phase flow of the double-channel sewage pump was numerically simulated by using the Mixture multiphase flow model,and the results were verified per-fectly by experiments.The partial condition mainly includes small flow rate of 0.6Qd and large flow rate of 1.2Qd .The results show that the pressure pulsation of volute circumference under 0.6Qd generally increase with the increasing of D2 ,and the maximum increase reaches 53.2% when the impeller dia-meter increases from 103 mm to 105 mm,while except points VP3,VP6 and VP7,the pressure pulsa-tion of volute circumference under 1.2Qd increase slightly with the increasing of D2 .The pressure pul-sation of volute circumference varies severely with angle change under 0.6Qd and 1.2Qd .The smaller impeller diameter is contributed to reduce the pressure pulsation in the pump under 0.6Qd and 1.2Qd . Instantaneous static pressure of each monitoring point around the tongue in all solid -liquid two-phase flow conditions fluctuates sharply when D2 is 105 mm.For each monitoring point near the tongue under the solid -liquid two-phase flow,the dominant frequency of pressure pulsation under 0.6Qd is of the low frequency,while the dominant frequency under 1.2Qd is of the blade passing frequency,the pressure pulsa-tion maximum amplitude of these points basically increase with the increasing of D2 under 1.2Qd .The re-sults provide the basis for the optimization design of double-channel sewage pump.关键词
双流道污水泵/偏工况/叶轮外径/压力脉动/固液两相流/叶频Key words
double-channel sewage pump/partial condition/impeller diameter/pressure pulsation/solid -liquid two-phase flow/blade passing frequency分类
农业科技引用本文复制引用
丁荣,谈明高,刘厚林,张景,何乃昌..双流道泵偏工况不同叶轮外径时压力脉动[J].排灌机械工程学报,2016,34(4):301-306,6.基金项目
“十二五”国家科技支撑计划项目（2013BAK06B02）；国家自然科学基金资助项目（51179075）；江苏高校优势学科建设工程资助项目；江苏大学研究生创新工程项目 （）
