渐缩式直锥形吸水室锥角对离心泵性能的影响  

Effect of diminishing conoid suction chamber's angle on the centrifugal pump's performance

作　　者：李万军[1] 刘德顺[1] 金永平[1] 刘婷[1] 

机构地区：[1]湖南科技大学机械设备健康维护湖南省重点实验室,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2012年第2期32-36,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：湖南省产学研结合技术创新工程计划项目(2010XK6066);湖南科技大学研究生创新基金项目(S110110);湖南省自然科学省市联合基金重点项目(11JJ8005)

摘　　要：以立式离心泵渐缩式直锥形吸水室为研究对象,采用数值模拟方法,应用FLUENT软件,基于N-S方程,采用重整化k-ε模型、SIMPLE算法和MRF模型对设计工况下的9组离心泵模型进行了仿真分析,预测了泵的性能,研究了渐缩式直锥形吸水室内部的流动状况及其锥角对泵性能的影响.结果表明,靠近吸水室内壁面区域和靠近叶轮进口区域流场较紊乱且随吸水室锥角变大逐步加剧;吸水室中心线附近区域沿水流方向流速变化率不大,靠近内壁面区域沿水流方向流速变化率较大且随吸水室锥角变大流速变化率逐渐增加;泵的轴功率随着吸水室锥角的增大而变大,扬程和效率随着吸水室锥角的变大略有下降.通过仿真可以为直锥形吸水室的设计提供一定的理论参考.Fluent softwave was used to study the effection of diminishing conoid suction chamber’s angle on the centrifugal pump’s performance,based on the N-S equation,the RNG k-ε model,the SIMPLE algorithm and MRF model.Nine pumps were simulated under the design point and their performance.The study revealed that the flow field adjacent to the inwall of the suction chamber and the impeller entrance were disorganized,especially when the angle of suction chamber become bigger,the variation of centerline velocity along the axis was limited,the variation of velocity adjacent to the inwall was obvious especially when the angle of suction chamber become bigger.The shaft power was increased,the efficiency and the head were decreased while accrescent the angle of suction chamber.It is of important signifinance to the design of conoid suction chamber.

关 键 词：离心泵 吸水室 锥角 数值模拟 

分 类 号：TH311[机械工程—机械制造及自动化]