低比转速叶轮内部流动的数值计算*

作者：陈洁达1，崔宝玲1，万忠1，郑齐銮2，朱祖超1 日期：2010-06-21/span> 浏览：2769 查看PDF文档

低比转速叶轮内部流动的数值计算*
陈洁达1，崔宝玲1，万忠1，郑齐銮2，朱祖超1
（1．浙江理工大学 机械与自动控制学院，浙江 杭州 310018； 2.浙江天德泵业有限公司，浙江 苍南 325800）

摘要：为了解复合叶轮内部流动特性，采用雷诺时均NavierStokes方程和SpalartAllmaras湍流模型对4长叶片的普通叶轮和4长4中8短16叶片的复合叶轮内部流动进行了数值模拟，得到了设计工况下两种叶轮内部流场分布，分析了中、短分流叶片对叶轮内部流场的影响。计算结果表明：采用长、中、短叶片设计的复合叶轮可以改善流道内流场分布，提高长叶片吸力面压力，有效地阻止液流的脱流，复合叶轮可以获得更高的静压差，有效地提高了离心泵的扬程。
关键词：离心泵；低比转速；复合叶轮；数值模拟
中图分类号：TH311文献标识码：A文章编号：1001-4551(2010)03-0021-04

Numerical computation of inner flow in lowspecificspeed impeller

CHEN Jieda1, CUI Baoling1, WAN Zhong1, ZHENG Qiluan2, ZHU Zucao1
（1. Faculty of Mechanical Engineering and Automation, Zhejiang SciTech University,
Hangzhou 310018, China; 2. Zhejiang Tiande Pumps Co., Ltd., Cangnan 325800, China）

Abstract: Aiming at realizing the inner flow performance of complex centrifugal impellers, the NavierStokes equations and the SpalartAllmaras turbulence model were carried out to simulate the inner flow field in lowspecificspeed complex centrifugal impellers with fourlong blades and fourlong fourmiddle eightshort blades. The distributions of velocity and pressure were obtained, and the properties of inner flow inside the volute were also analyzed. The calculation result shows that middle and short blades can improve distribution of the velocity and pressure in inner flow field, increase the suction side pressure and prevent liquid separation from suction side in complex impellers. Complex centrifugal impellers can get higher static pressure rise and improve the performance of centrifugal pump.
Key words: centrifugal pump; low specific speed; complex impeller; numerical simulation