管壳式换热器新型支撑结构的数值模拟  

Numerical simulation of new support structures in shell side of shell-and-tube heat exchanger

作　　者：周水洪[1] 邓先和[1] 

机构地区：[1]华南理工大学传热强化与过程节能教育部重点实验室

出　　处：《冶金能源》2007年第2期46-49,共4页Energy For Metallurgical Industry

基　　金：国家重点基础研究发展规划项目(No.G2000026301)

摘　　要：提出并分析了一种新型的传热强化元件———旋流片作为管束间支撑物的流动与传热特性。在实验研究基础上,应用周期性单元流道模型,数值模拟了空心环和旋流片支撑时的湍流流动和传热性能。结果表明,空心环和旋流片均增强了换热,但都产生一定的阻力损失,特别是旋流片可以产生较大的形体阻力。周期性间隔布置的旋流片能产生衰减性的自旋流,有效冲刷壁面和增强扰流,换热效果优于空心环,具有较好的综合强化换热性能。Twisted - leaf robe bundle support was conducted and investigated as a new type of heat transfer augmentation element, including flow and heat transfer characteristics. Based on experimental analysis, a shell- side periodic unit channel model was developed to conduct numerical simulation. The results demonstrate that beth types of supports can enhance heat transfer with resistance loss. Especially twisted leaf gives a higher form resistance loss. Twisted - leaf support has better heat transfer enhancement than ring support, and have more resistance loss. Twisted leaf has a better integrated performance resulting from its very high heat transfer efficiency and low resistance loss in its free swirl zone.

关 键 词：空心环 旋流片 换热器 数值模拟 

分 类 号：TK172[动力工程及工程热物理—热能工程]