摘要
利用FLUENT软件对三叶孔板换热器壳程流体流动和传热特性进行了数值模拟研究,通过建立周期性全截面计算模型,对其强化传热机理进行了研究,分析了壳程内不同位置换热管壁面对流传热系数与换热管至壳体轴心距离的关系。结果表明:流体流经三叶孔时产生的射流以及在三叶孔板后产生的二次流动使壳程传热得到强化;三叶孔板换热器壳程内随着换热管至壳体轴心距离的增大,换热管壁面对流传热系数逐渐减小。
By using software FLUENT, the numerical simulation research for the characteristics of fluid flow and heat transfer in the shell side of the heat exchanger with trefoil-tube-support plates was carried out. With the model of periodical whole cross-section, the mechanism of intensified heat transfer was studied, and the relation of surface convection heat transfer coefficient at different location and the distance to the center of cylinder was analyzed. It was shown that the heat transfer is intensified by the jet flow appeared when fluid go through the trefoil holes and the secondary flow emerged behind the support plates, and the surface heat transfer coefficients of tubes in the shell-side of the heat exchanger decrease with the he distance from tubes to the axis of the shell increasing.
出处
《化工设备与管道》
CAS
2012年第2期21-23,27,共4页
Process Equipment & Piping
基金
国家自然科学基金(No.51006092)
关键词
三叶孔支撑板
流场
温度场
数值模拟
trefoil-tube-support plate
flow field
temperature field
numerical simulation
