离心泵叶片斜开槽抑制空化的研究  

Research on Cavitation Suppression of Oblique Slotted Blade in Centrifugal Pump

作　　者：赵伟国[1] 李兴国 聂雄杰 刘莹 ZHAO Wei-guo;LI Xing-guo;NIE Xiong-jie;LIU Ying(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,Guangsu Province,China;PREEMINENCE PUMP CO.,LTD,Songxi 353500,Fujian Province,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]普仑斯(福建)泵业有限公司,福建松溪353500

出　　处：《中国农村水利水电》2024年第10期119-126,共8页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(52169018);甘肃省教育厅高校科研创新平台重大培育项目(2024CXPT-09);甘肃省教育厅产业支撑计划项目(2021CYZC-27)。

摘　　要：为了抑制低比转数离心泵的空化,提出改变叶片开槽轴向角度的方法,并设计了3种叶片斜开槽方案。通过数值模拟的方法,对比离心泵试验结果,分析叶片斜开槽对离心泵空化抑制的效果。模拟结果表明:轴向角度为5°的叶片斜开槽对低比转速离心泵的空化抑制效果最明显,断裂扬程提高了0.281 m;叶片斜开槽抑制了离心泵叶轮流场内空泡的发展,在空化严重阶段空泡体积最多减小了67.25%;叶片斜开槽优化了叶轮流场结构,缩小了叶轮进口低压区,降低了叶轮流道内的湍动能。In an effort to suppress cavitation in low-specific speed centrifugal pump,a method of changing the axial angle of slotted blade was proposed,and three oblique slotted blade schemes were designed.By using numerical simulation methods to compare the experimental results of centrifugal pumps,analyze the effect of blade oblique slotting on the suppression of cavitation in centrifugal pump.The simulation results show that the oblique slotted blade with an axial angle of 5°has the most significant cavitation suppression result on low-specific speed centrifugal pump,and the fracture head is increased by 0.281 m.The oblique slotted blade suppress the development of cavitation in the flow field of the centrifugal pump impeller,and the maximum reduction in cavitation volume is 67.25%during the severe cavitation stage;The oblique slotted blade optimize the flow field structure of the impeller,reduces the low-pressure area at the impeller inlet,and reduces the turbulent kinetic energy in the impeller channel.

关 键 词：离心泵 数值模拟 轴向角度 斜开槽 空化抑制 

分 类 号：TH311[机械工程—机械制造及自动化]