基于CFD技术脱硫泵的设计与试验  

Design and experiment of desulphurization pump based on CFD

作　　者：刘建瑞[1] 肖志杰[1] 王鸿睿[1] 滕人博[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：《排灌机械》2009年第1期6-9,共4页Drainage and Irrigation Machinery

基　　金：江苏省高技术研究项目(BG2004040)

摘　　要：采用经验系数设计法对脱硫泵进行水力设计,适当增大叶片出口宽度,以改善颗粒通过性和叶轮出口的磨损情况.应用FLUENT软件,采用欧拉多相流模型,分别计算了颗粒直径为0.06,0.08和0.10 mm,体积浓度为11%工况下脱硫泵的两相流内部流场.得到以下结论:叶轮流道内,工作面上的静压值明显高于背面上的静压值;最低压力点出现在叶片进口背面侧,容易发生汽蚀;随着粒径的增大,颗粒逐渐向叶片工作面迁移.叶片的磨损主要发生在叶片进口处和叶片的出口段.通过试验验证:设计的脱硫泵效率为82.0%,性能曲线平坦,高效范围宽,各项技术指标均满足设计要求.Based on the empirical coefficient method, the hydraulic design of desulphurization pump has been improved by increasing the outlet width of the blade. The Fluent software and Euler model for multiphase flow were adopted for the numerical simulation of the pump. The results show that the static pressure of pressure side is higher than that of the suction side ; the lowest pressure of the inlet appears on the back side of the blade, which will result in cavitation ; the grain was transferred to the direction of pressure side of the impeller with the increase of the granular radius. The abrasion of the blade appears mainly at the inlet and outlet of the blade because of the centrifugal force. The experiments show that the efficiency is 82.0%, the performance curve is flat, and the high efficiency range is wide. All the technical parameters are satisfied for the design requirements.

关 键 词：脱硫泵 水力设计 叶轮 数值模拟 

分 类 号：TH311[机械工程—机械制造及自动化]