泵自吸过程气液两相流动特性及自吸机理的研究

项目名称： 泵自吸过程气液两相流动特性及自吸机理的研究

项目编号： No.51279068

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 李红

作者单位： 江苏大学

项目金额： 80万元

中文摘要： 自吸泵广泛应用于移动排灌、启动频繁和灌液困难等场合。由于自吸过程中气液两相流动非常复杂，自吸机理尚未掌握，已成为制约泵自吸技术发展的瓶颈。 项目将针对自吸过程气液两相瞬变流动开展研究。建立泵自吸过程气液两相流动特性与自吸性能外特性协同测试系统，研究泵内气液吸入、气液混合、气液分离、气体排出和液体回流的详细流动过程；结合气液两相流动瞬态测试数据，采用多相流欧拉分析方法结合滑移网格技术，对泵自吸过程开展非定常瞬态模拟研究，建立合适的数学模型与计算方法，首次实现泵自吸过程气液两相流动的三维数值计算。通过研究自吸关键监测点的流动状态，建立泵内部流动特性和自吸外特性之间的内在联系，研究泵水力结构、运行参数等对自吸流动过程的影响。 本项目旨在揭示自吸过程中气液两相流动规律，掌握自吸机理，预测自吸性能，建立自吸泵原理性水力设计方法，为开发新型高性能自吸泵提供理论依据。

中文关键词： 泵；自吸过程；气液两相流；流动特性；自吸机理

英文摘要： Self-priming pumps are applied widely in many situations, such as movable irrigation, frequently starting, difficultly filling water. Since the gas-liquid flow in the self-priming process in the pumps is too complicated to grasp the self-priming mechanism by now, the lack of the self-priming mechanism has become a bottleneck of the futher development of self-priming pumps. The project will focus on the transient gas-liquid two-phase flow during the self-priming. The experimental system will be built to test the inner flow characteristics and outer self-priming performance of the pump. The dynamic flow processes will be researched in details, such as gas-liquid suction, gas-liquid mixture, gas-liquid separation, gas exhaustion and liquid return. Combined with the experimental transient results, the flow field will be simulated transiently applying multi-phase Euler models jointed with slipping grid technology. The mathematical models and calculation methods of the flow inside the pump will be built, and the 3-demensional numerical simulation to describe the flow inside the pump during the self-priming will be realized at first home and abroad. The inner flow characteristics are linked with the outer self-priming performances by the research on the states of the key monitoring points. The influences on the self-pr

英文关键词： pump；self-priming process；gas-liquid two-phase flow；flow characteristics；self-priming mechanism