单级与多级侧流道泵内部流动特性  

Internal flow characteristics of single-stage and multi-stage side channel pumps

作　　者：王金也 张帆[1] 张金凤[1] 陈轲 洪秋虹 WANG Jinye;ZHANG Fan;ZHANG Jinfeng;CHEN Ke;HONG Qiuhong(National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Kunming Jiahe Science&Technology,Ltd.,Kunming,Yunnan 650501,China)

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [2]昆明嘉和科技股份有限公司,云南昆明650501

出　　处：《排灌机械工程学报》2023年第2期132-138,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51809121)。

摘　　要：为了研究前置离心叶轮对侧流道泵性能以及内部流动特性的影响,基于SST-SAS湍流模型,对不同工况下单级以及多级侧流道泵内部流动进行三维非定常数值模拟,研究了单级与多级侧流道泵扬程、侧流道泵叶轮进出口压力、侧流道间的质量交换以及旋涡结构分布特性.结果表明:添加前置离心叶轮后的多级侧流道泵扬程整体有所提升,侧流道叶轮的进口压力提升了20%,叶轮与侧流道之间的质量流量也提升了约20%,多级侧流道泵叶轮内涡团分布与单级泵分布规律基本相同,添加前置离心叶轮对侧流道泵内部流动影响较小.研究结果为后续多级侧流道泵的空化研究以及结构优化提供了参考.To study the influence of the initial stage centrifugal impeller on the performance and internal flow characteristics of a radial vane multi-stage side channel pump with low specific speed, an unsteady three-dimensional numerical simulation was carried out using the SST-SAS turbulence model on a single-stage and multi-stage side channel pumps under different working conditions. The results reveal that the head of the multi-stage side channel pump improves after adding the centrifugal impeller as the first stage. The inlet pressure of the side channel impeller increases by 20%, the mass flow between the impeller and the side channel is also increased by about 20%. However, the distribution of vortices in the impeller of the multi-stage side channel pump is basically the same as that of single-stage and the addition of the centrifugal impeller as the first stage has little effect on the internal flow characteristics of the single-stage pump. The findings of this research paper provide a reference and theoretical basis for subsequent cavitation research and structural optimization of multi-stage side channel pumps.

关 键 词：前置离心叶轮 侧流道泵 SAS湍流模型 非定常流动 旋涡 

分 类 号：S277.9[农业科学—农业水土工程] TH314[农业科学—农业工程]