Based on the shell fluid flow and heat transfer numerical calculation results of shutter baffle heat exchanger and baffle-plate heat exchanger with the periodic whole cross-section computation model, the field synergy principle was adopted to analyze the heat transfer performance of the two kinds of heat exchangers. The shell-side velocity and turbulence in different position of the shutter baffle heat exchanger as well as field synergy angle and surface convective heat transfer coefficient were analyzed, followed by making comparison with the baffle-plate heat exchanger. The results show that the shell fluid of baffle-plate heat exchanger is horizontal flow and that of shutter baffle heat exchanger is vertical flow, so the average velocity and turbulence of baffle-plate heat exchanger are slightly higher than those of shutter baffle heat exchanger, with its average velocity 1. 15 times that of shutter baffle heat exchanger and its turbulence intensity 1. 4 times that of shutter baffle heat exchanger; the average value of local field synergy angle on two validation lines in baffle-plate heat exchanger is less than that of shutter baffle heat exchanger, thus the convective heat transfer effect of baffle-plate heat exchanger is better than that of shutter baffle heat exchanger. The results provide references for the structure and performance improvement of tubular heat exchanger, and the structural feature of shutter baffle heat exchanger is also important for energy saving.%基于采用周期性全截面计算模型得到的帘式折流片换热器和折流板换热器壳程流体流动和传热数值计算结果,应用场协同原理对二者传热性能进行了分析.分析了帘式折流片换热器在壳程不同位置处的速度和湍流度,以及场协同角和对流传热系数,并与折流板换热器相同位置处的情况进行了对比.由于折流板壳程流体为横向流动,而帘式折流片壳程总体上是纵向流动,故折流板换热器的平均流速和湍动度稍高于帘式折流片换热器,平均流速为帘式折流片换热器的1.15倍,其湍动程度为帘式折流片换热器的1.4倍;折流板换热器2条验证线上的场协同角的平均值均小于帘式折流片换热器.研究结果为管壳式换热器结构改进和性能提升提供了参考依据,同时帘式折流片换热器的这种结构特点对于节能降耗的研究也具有重要意义.
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