摘要
研究了一种新型套管双壳程连续螺旋折流板换热器,套管将壳程分为内外两部分,内壳程无折流板,外壳程采用连续螺旋折流板。建立了换热器的三维模型,采用分离式求解器,SIMPLE算法,k-湍流模型,借用CFD软件FLUENT对套管双壳程连续螺旋折流板换热器和传统弓形折流板及传统单壳程连续螺旋折流板换热器壳程流动和换热特性进行模拟研究,结果表明:相同壳程进口流速下,套管双壳程连续螺旋折流板换热器的壳程压力降比弓形折流板和单壳程连续螺旋折流板换热器降低平均值分别为62.17%和22.76%,传热速率比这两种换热器均提高了25.98%和21.79%,单位传热量的压力降相比于这两种换热器降低平均值分别为68.93%和38.69%。
A novel double shell-pass heat exchanger with sleeve tube and continuous helical baffles was proposed. The sleeve tube was applied to separate the shell-pass into two parts, the inner one having no baffles and the external one with helical baffles. Based on the 3-dimensional physical model of the heat exchangers, with the k-6 turbulent model, SIMPLE pressure-velocity coupling algorithm and segregated solver, the flow and heat transfer characteristics of the novel double shell-pass heat exchanger with sleeve tube and continuous helical baffles were studied by means of computational fluid dynamics （CFD） software. The results indicate that, under same velocity flow rate, the pressure drop of the novel heat exchanger is 62.17% and 22.76%, lower than the conventional segmental baffled heat exchangers and conventional helical baffled heat exchangers. The heat transfer rate is increased by 25.98% and 21.79% compared with the two types of heat exchangers. The pressure drop under unit heat transfer rate was applied to evaluate the comprehensive performance of heat exchangers. Compared to these two types of heat exchangers, the value of the novel heat exchanger is reduced by 68.93% and 38.69%, respectively.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第14期82-87,5,共6页
Proceedings of the CSEE
基金
太原科技大学青年基金资助项目(20113007)~~
关键词
螺旋折流板换热器
双壳程
压力降
传热速率
数值模拟
helical baffled heat exchangers
doubleshell-pass
pressure drop
heat transfer rate
computational fluiddynamics （CFD）
