一维双流体分层/段塞流模型的特征根分析  

CHARACTERISTICS ANALYSIS OF TRANSIENT ONE-DIMENSIONAL TWO-FLUID MODEL FOR STRATIFIED AND SLUG FLOWS

作　　者：顾汉洋[1] 郭烈锦[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《工程热物理学报》2006年第z1期217-220,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.10172069);优秀重点实验室资助项目(No.50323001)

摘　　要：采用特征根方法对描述水平和倾斜管内气液分层流/段塞流的一维双流体模型进行适定性分析.系统分析了气液两相密度、粘性和管道倾角对一维双流体模型适定性的影响。计算结果表明:液相密度、气相粘性和管道下倾角的增大能拓宽方程组求解的适定区域;适定界线与气液两相流流型转变界线之间存在内在联系.Equation system describing one-dimensional transient two-fluid model for stratified and slug flows in pipes is analyzed using the method of characteristics.Gas compressibility is taken into account in the analysis.The effects of physical properties and pipe inclination on the well-posedness of equation system are studied,respectively.It is found that increases in density of liquid,viscosity of gas and pipe upward inclination enlarge the well-posedness region.It is also shown that the well-posedness limit fits well with the stratified-to-slug flow pattern transition boundaries.

关 键 词：特征根 一维双流体模型 适定性 

分 类 号：O359[理学—流体力学]