T型管内两相流分配特性数值模拟  

The numerical simulation of two-phase flow distribution characteristics in T-tube

作　　者：王丹华[1] 张冠敏[1] 冷学礼[1] 徐梦娜 韩圆圆 WANG Danhua,ZHANG Guanmin,LENG Xueli,XU Mengna,HAN Yuanyuan(School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, Chin)

机构地区：[1]山东大学能源与动力工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2018年第1期89-95,111,共8页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(31380005131503)

摘　　要：T型管内气液两相流分配不均易导致换热器偏流和受热不均。为了优化T型管内气液两相流流动,以FLUENT为模拟软件,以流体流动参数和管子几何结构为研究变量,对T型管内流体流动进行数值模拟。发现流体入口液相体积分数越大,入口速度越小,液滴粒径越小,越利于流体均布;同时支管衔接处采取弯管结构较直管结构优越,其中入口速度对流体分布影响最明显,速度相差3个数值即可优化两个出口液相体积分数比差10%左右。结果表明,相应改变流体流动参数和管子几何结构能有效优化T型管内流体流动。Uneven distribution of gas-liquid two-phase flow in T-tube was easy to cause bias flow and uneven heating in heat exchangers.To optimize the gas-liquid two-phase flow in T-tube,the simulation about influences of flow parameters and tubes geometric structure on distribution of two-phase flow characteristics in T-tube was carried out by FLUENT. It was found that higher volume fraction of liquid phase and slower inlet velocity,and a smaller diameter of liquid drops facilitate even distribution of fluid.Meanwhile,the elbow structure was better than a straight tube at joints of branch tubes,the inlet velocity had most obvious influence on flow distribution,the difference of three units in speed could result in around 10% variation in volume fraction ration between two outlets. The results showed that change the flow parameters and tubes geometric structure correspond could optimize fluid flow in T-tube effectively.

关 键 词：气液两相流 流体均布 数值模拟 流动参数 几何结构 

分 类 号：TK121[动力工程及工程热物理—工程热物理]