T型管内两相流分配特性数值模拟

doi:10.6040/j.issn.1672-3961.0.2017.057

摘要/Abstract

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。

关键词: 流动参数, 流体均布, 气液两相流, 数值模拟, 几何结构

Abstract: 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.

Key words: uniform fluid distribution, flow parameters, geometric structure, numerical simulation, gas-liquid two-phase flow

中图分类号:

TK121

王丹华,张冠敏,冷学礼,徐梦娜,韩圆圆. T型管内两相流分配特性数值模拟[J]. 山东大学学报(工学版), 2018, 48(1): 89-95.

WANG Danhua, ZHANG Guanmin, LENG Xueli, XU Mengna, HAN Yuanyuan. The numerical simulation of two-phase flow distribution characteristics in T-tube[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2018, 48(1): 89-95.

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