气液两相流水平绕流柱体的动态压降特性  

Dynamic Pressure Drop Property of Gas-Liquid Two-Phase Flow around a Horizontal Cylinder

作　　者：孙志强[1] 张宏建[1] 

机构地区：[1]浙江大学控制科学与工程学系工业控制技术国家重点实验室

出　　处：《高校化学工程学报》2008年第3期378-383,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家高技术研究发展计划(863计划)项目(2001AA413210)

摘　　要：压降是气液两相流绕流柱体时包含丰富流动信息的重要参数,对于压降的研究密切关系到两相流动系统的设计和运行。以空气和水为实验介质在泡状流、塞状流、弹状流和环状流四种流型下,研究了气液两相流水平绕流梯形柱体的动态压降特性。结果表明:泡状流和塞状流的动态压降有较稳定的波动,其时均值主要取决于液相流量;弹状流的动态压降变化剧烈,其时均值随两相雷诺数的分布比较均匀;环状流的动态压降变化比较平缓,其时均值随两相雷诺数的增加呈近似线性递增;在四种不同流型下,时均动态压降系数随两相雷诺数的增加都呈线性递减。这一结果为分析气液两相流绕流柱体的流动特性提供了有益的借鉴。Pressure drop is a flow-information-intensive parameter for gas-liquid two-phase flow around a cylinder. The investigation on pressure drop is closely concerned with the design and operation of two-phase flow systems. In this paper, the dynamic pressure drop property of gas-liquid two-phase flow around a horizontal quasi-trapezoidal cylinder was studied with two-phase flow of air and water under bubble, plug, slug and annular flow regimes, respectively. The results show that: the dynamic pressure drops of b...

关 键 词：气液两相流 柱体绕流 压降 动态特性 

分 类 号：O359.1[理学—流体力学]