摘要
采用数值模拟方法,使用FLUENT对管壳式换热器壳侧的两相流动及相变传热进行了模拟计算。根据壳侧流体流动特点,选定合适的湍流模型、两相流模型为混合物模型,并根据汽水转化公式编写了自定义函数UDF来描述相变过程质和量的传递。对管壳式换热器壳侧的流体介质换热发生相变并产生气液两相流动进行了三维的数值模拟研究。得到了管壳式换热器壳程的速度场、温度场、压力场及气液各相的分布情况,对壳侧气液两相流动及相变换热进行了分析。对具有相变情况下的管壳式换热器的结构设计起到参考指导作用。
Numerical simulation methods are adopted in this paper. With the FLUENT software, the paper stimulates the two-phase flow and phase change and heat transfer. A turbulence model and a two-phase flow model are selected in this paper. Based on the characteristics of shell-side in the shell and tube heat exchangers, the paper writes User-defined Function （UDF） to describe the phase transition of quality and quantity through the use of the conversion formula. Flow media of shell and tube heat exchanger shell-side heat transfer occurring phase change and gas-liquid two-phase flow are studied by 3D numerical-simulation, obtaining velocity field, temperature field, pressure field and gas-liquid distribution of shell and tube heat exchanger shell side. The two-phase flow and phase change and heat transfer of shell-side in the shell and tube heat exchangers are analyzed. These will be provided some valuable references for the improvement of tube condenser structure design.
出处
《汽轮机技术》
北大核心
2012年第5期345-347,400,共4页
Turbine Technology
基金
哈尔滨工程大学2011年研究生培养基金
经费项目代码为00207001060911
关键词
管壳式换热器
两相流动
相变换热
数值模拟
shell and tube heat exchanger
gas-liquid two-phase flow
phase change and heat exchange
numerical - simulation
