液环真空泵内气液两相流动的数值分析  

Numerical analysis of gas-liquid two-phase flow in liquid-ring vacuum pump

作　　者：黄思[1] 阮志勇[1] 邓庆健[1] 吴泰忠 谭紫华 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]广东省佛山水泵厂有限公司,广东佛山528000

出　　处：《真空》2009年第2期49-52,共4页Vacuum

摘　　要：液环真空泵是广泛应用于石油、化工、冶金、矿山、电力、轻工等行业的基础设备。液环泵内的流动属于十分复杂的非稳态气液两相流动,目前还存在着能耗高、效率偏低等问题,而现有的理论分析无法准确描述液环真空泵内气液两相流动状况。本文运用FLUENT流动软件中的多相流欧拉分析方法结合滑移网格技术,模拟计算一单级单作用液环真空泵三维非稳态气液两相流动问题。计算区域包括液环泵进出气段、叶轮、进水管及泵体,滑移界面分别设置在液环泵的进、出气段与叶轮之间的交界面以及叶轮出口与泵壳间的交界面。模拟计算包括液环真空泵内气液两相流速、压力、两相分布等内容。计算结果表明:本文所采用的分析方法和手段,可以较好的模拟分析计算液环真空泵非稳态气液两相流动问题,对实现产品的优化设计,具有重要的工程指导作用。Liquid-ring vacuum pump is widely used as an integral part in many industries. The gas-liquid two-phase flow in pump is very complex and in unsteady state, thus resulting in its low efficiteney and high energy consumption. Existing theortetic analyses are hard to express accurately such a flow in the pump. So, the Eulerian multiphase approach in FLUENT software is introduced in combination with sliding mesh technique to simulate mumerically the 3-D unsteady gas-liquid two-phase flow within a single-stage liquid-ring vacuum pump, including the air inlet/outlet section, vane wheel, water inlet and pump body, as well as the two-phase flowrate. The sliding grid interfaces are provided at the interface between vane wheel and air inlet/outlet and that between vane offtake and pump case. The simulation computation results thus can analyze essentially the two-phase flow and will play an important role in the optimal design of liquid-ring vacuum pump.

关 键 词：液环真空泵 气液两相流 数值模拟 

分 类 号：TQ051.7[化学工程]