气液旋流器内液滴破碎和碰撞的数值模拟  

Numerical simulation on breakup and collision of droplet in gas-liquid cyclone separator

作　　者：金向红[1] 金有海[2] 王建军[2] 

机构地区：[1]安徽理工大学化工学院,安徽淮南232001 [2]中国石油大学机电工程学院,山东东营257061

出　　处：《中国石油大学学报（自然科学版）》2010年第5期114-120,125,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'863'高技术研究发展计划项目(2006AA06Z224)

摘　　要：气液旋流分离器内是一个复杂的强旋湍流场,流场内的液滴受气动力、剪切力和湍流脉动的作用,发生剧烈的相互碰撞、聚合、破碎并撞击筒壁。对旋流器内液滴间的碰撞、聚合、液滴的破碎和碰壁的机制进行分析,在前人研究的基础上,结合旋流器的实际情况,提出适用于气液旋流器强旋气相湍流场内液滴间碰撞、液滴破碎和碰壁过程的计算模型,对新的数学模型进行数值模拟计算。结果表明,本模型能较为准确地预测强旋气相湍流场内液滴间碰撞、液滴破碎和碰壁过程,完善了气液旋流器的分离机制模型,为改善其分离性能及其工程设计提供了理论基础。The strong swirling turbulence flow field in the gas-liquid cyclone separator is complex and liquid droplets undergo collision,coalescence,breakup with each other and impacting with solid surface,for the effect of aerodynamic force,shearing force and turbulent shear force. The mechanism of the droplets in the above process was analyzed,and the applicable computational models,validated by numerical calculation,were given for the actual case of the droplets in the cyclone separator. The results indicate that the new mathematical models could predict the strong swirling turbulence flow field precisely, improve the separation mechanism model of gas-liquid cyclone and provide theoretical principle for improving separation efficiency and engineering design.

关 键 词：气液旋流 分离器 湍流场 液滴 破碎 聚结 

分 类 号：TQ051.8[化学工程]