三分螺旋折流板换热器壳侧流场温度场模拟  

Numerical Simulation of Flow Field and Temperature Field in Shell Side of Trisection Helix Heat Exchangers

作　　者：王伟晗[1,2] 陈亚平[1] 吴嘉峰[1] 操瑞兵[1] 董聪[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096 [2]上海应用技术学院城市建设与安全工程学院,上海201418

出　　处：《工程热物理学报》2012年第1期131-134,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50976022);"十一五"国家科技支撑计划重点项目(No.2008BAJ12B02)

摘　　要：建立了三分螺旋折流板换热器壳侧流动与传热的数学模型,对其流场、温度场和压力场的数值模拟结果在多个纵剖面和横切片上进行了展示。可见在螺旋通道的轴心和靠近壳体的折流板外缘区域局部速度较高,在折流板背流面呈现出有利于强化掺混作用的回流区,流道内几乎没有流动死区;壳侧流体温度为稳步均匀下降趋势,并呈现从圆周的外缘向轴心方向逐渐递减;而压力场则呈现明显的周期性和阶梯性。The mathematical model for flow and heat transfer at the shell side of trisection helix heat exchanger was established to analyze the flow, temperature and pressure fields. The numeric simulation results show that the local velocities at the axis of the helix channel and some area near the shell cylinder are higher than the other regions. The vortex zones appear on the back of the baffles which can enhance the mixing： effect of the fluid. There is almost no stagnant zone in the flow channel. The fluid temperature drops steadily towards exit end along the axis and centripetally. Moreover, the pressure field appears a decrease trend step by step periodically.

关 键 词：三分螺旋折流板换热器 流场 温度场 压力场 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]