磁液悬浮离心血泵的流场数值模拟及其优化设计  

Numerical Simulation and Optimization Design of Magnetic-liquid Suspension Centrifugal Blood Pump

作　　者：舒崚峰 王洪杰[2] 宫汝志[2] SHU Ling-feng;WANG Hong-jie;GONG Ru-zhi(Huadong Engineering Corporation Limited,Hangzhou 311122,China;Energy Science and Engineering school,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]华东勘测设计研究院有限公司,浙江杭州311122 [2]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《节能技术》2019年第6期540-544,共5页Energy Conservation Technology

摘　　要：磁液悬浮离心式人工血泵要求运行平稳、工作可靠,但实验发现扬程与效率值偏低,并观察到叶轮存在一定的失稳现象。为探究其原因,该文采用SIMPLE压力校正算法和标准k-ε湍流模型对存在失稳现象的磁液悬浮离心式人工血泵进行了非定常数值模拟。通过分析叶轮内部流场,提出三种叶轮优化方案并进行数值模拟验证。模拟结果显示:叶轮流道扭转20°可使扬程和效率分别提高8%和5%,出口倒斜角40°可使径向力减少22%。High reliability should be guaranteed in the running of magnetic-liquid suspension centrifugal blood pump. However, low pump head and efficiency as well as instability of impeller are observed in experiment. To reveal the underlying reasons, the unsteady numerical simulation was conducted by using the k-ε model and SIMPLE method. Three impeller optimization schemes are proposed based on the impeller flow field analysis, and are finally examined by numerical simulation. The results show that, twirling the impeller by 20° will increase the pump head and efficiency by 8% and 5% respectively, and using a 40° beveling impeller outlet angle will decrease the radial force by 22%.

关 键 词：离心血泵 失稳 数值模拟 流场分析 叶轮优化 

分 类 号：TK72[动力工程及工程热物理—流体机械及工程]