气—幂律两相流体流经截面突缩管的数值模拟  

Numerical simulation on two-phase flow of air and power-law liquid through suddenly shrunken channels

作　　者：张军[1] 郑捷庆[1] 

机构地区：[1]集美大学机械工程学院,福建厦门361021

出　　处：《石油钻采工艺》2007年第3期108-110,113,共4页Oil Drilling & Production Technology

基　　金：福建省自然科学基金(E0410027);福建省青年人才创新项目(2002J022);福建省教育厅计划项目(JA004232)资助

摘　　要：为揭示空气—幂律流体流经截面突变时的两相流动规律,尤其是两相参数沿流向及管截面分布及压降的变化规律,根据气液两相流理论,并考虑幂律流体的本构方程,建立了空气—幂律流体两相流动数学模型。在此基础上,采用商业软件Fluent对空气—幂律两相混合物流经截面突缩管道的流动特性进行了数值模拟,获得了两相参数沿轴向及截面方向的分布规律。研究表明:气相、液相速度及压降随着输入含气量的增大而增大;两相参数在截面突变附近有急剧的改变,但其突变位置却有所不同;另外,两相参数的截面分布沿流程也有所不同。这些研究结果对相关系统的设计提供了理论依据。A mathematical model of two-phase air and power-law flow is developed on the basis of the two-phase flow theory of gas and liquid and the constitutive equation of power-law fluid. The flow characteristics of two-phase mixtures of air and power-law fluid through a suddenly shrunken channel are numerically simulated by using commercial software named Fluent. Then the distribution law of two-phase parameters along axial and sectional directions is obtained. Research results show that the higher the gas velocity, liquid velocity, and pressure drop are, the more the input gas content increases. What's more, the two-phase parameters change abruptly nearby the suddenly shrunken section, yet the mutation positions are different. In addition, the sectional distribution of the two-phase parameters is also different along axial direction. All the research results provide a theoretical basis for the design of relevant systems.

关 键 词：空气-幂律两相流 截面突缩管道 流动特性 数值模拟 

分 类 号：TK121[动力工程及工程热物理—工程热物理] TE832[动力工程及工程热物理—热能工程]