双管程换热器内管程流体流动特性研究

Study on Flow Characte ristics of Fluid in Tube Side of Double Tube Heat Exchangers

提高换热器换热效率是其结构优化的重要目标。采用CFD软件对双管程固定管板式热交换器管程内流体的流动特性进行了模拟研究。研究结果表明,管程内流体的流动特性受管程分程隔板的影响,使管箱内产生多个漩涡,造成换热管内流体流量分配不均,从而影响换热器的换热效率。

The ultimate objective for optimizing the construction of a heat exchanger is to increase its heat exchange efficiency. CFD is used to conduct simulation to study the flow characteristics of fluid in the tube side of the double-tube fixed tube sheet type heat exchanger. The study shows that,the flow characteristics of the fluid in the tube side is influenced by the baffle plate in the tube side,which causes multiple vortexes inside the tube box,and consequently the flow distribution of the fluid in the heat exchange tubes is uneven,which in turn affects the heat exchange efficiency of the heat exchanger.