离心泵内流场空化特性的数值模拟研究  

Numerical simulation on cavitation characteristics of flow field in centrifugal pump

作　　者：明廷锋[1] 郭井加 曹玉良[1] 章军[1] 

机构地区：[1]海军工程大学动力工程学院 [2]91656部队装备质量控制室

出　　处：《机电工程》2016年第6期643-647,共5页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学青年基金资助项目(51306205);湖北省自然科学基金资助项目(2015CFB700)

摘　　要：针对离心泵内流场特性分析困难的问题,对离心泵流场数值模拟的几何模型建立、模型网格划分和边界条件设定进行了研究,采用计算流体力学方法,获取了在敞水性能条件下离心泵的扬程-流量、效率-流量的变化关系;结合Zwart空化模型,重点对不同有效汽蚀余量时离心泵的空化流场进行了数值模拟,得到了离心泵的内部流线和空泡分布的情况,并与该离心泵机组进行了性能测试实验,最后在此基础之上进行了对比分析。研究结果表明,所采用的数值模拟方法和空化模型合理有效,此结果可为进一步开展离心泵空化监测技术研究提供借鉴。Aiming at the difficult problem of the characteristics analysis of the flow field in the centrifugal pump,the numerical simulation method was proposed,which was based on the Geometric model established,the mesh generation and boundary conditions set. By using the computational fluid dynamics method,the relation between the head capacity and the flow,the efficiency and the flow of the centrifugal pump were found respectively in open water performance conditions. On the basis of the Zwart cavitation model,the cavitation flow field was numerical simulated under different NPSH of centrifugal pump. The streamline distribution and the cavitation bubbles distribution were obtained. The result indicates that through the comparison of experiment performance and cavitation numerical simulation of centrifugal pump,the numerical method and cavitation model is reasonable and effective,it can provide reference for further research on the technology of centrifugal pump cavitation monitoring.

关 键 词：离心泵 空化特性 计算流体力学 数值模拟 流场 

分 类 号：TH311[机械工程—机械制造及自动化]