轴流泵多工况变速调节的内部流场模拟  

Internal Flow Simulations on Axial Flow Pump Model in Multi-operating Conditions through Changing the Rotational Speed

作　　者：杨敬江[1] 张文寅 卢新全 李彦军[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《中国农村水利水电》2014年第4期116-119,共4页China Rural Water and Hydropower

基　　金：国家科技支撑计划课题(2011BAF14B03);江苏省自然科学基金项目(BK2011502)

摘　　要：为了研究变速调节下轴流泵的性能和内部流场特性,基于ANSYS CFX软件,采用k-ε模型对模型泵多个工况点进行了三维湍流数值计算,计算得到了轴流泵的性能曲线和叶片表面的速度、压力分布。基于数值计算结果对轴流式模型泵性能和叶轮内部流场分析,结果表明:随着转速的增加,扬程曲线升高。效率曲线则随转速的降低而左移。在偏离设计工况的小流量区域,通过变速调节可以扩大轴流泵的高效工作区。To investigate the performance and internal flow field characteristics of the axial flow pump model,based on the standard κ-ε model,3-dimensional turbulent flow numerical simulations are performed under several operating conditions by using ANSYS CFX.The perforrnance curves and the distribution of velocity and pressure on blades are obtained and analyzed.The results show that with the increase in rotational speed,the head-flow performance curve is elevated and the efficiency performance curve is moved to leave with the decrease in rotational speed.Under low flow-rate conditions,the high efficiency region of the axial flow pump can be enlarged by the variable rotational speeds.

关 键 词：轴流泵 变转速 叶轮 湍流流场 

分 类 号：TH312[机械工程—机械制造及自动化]