不同翅片形式管翅式换热器流动换热性能比较.doc

不同翅片形式管翅式换热器流动换热性能比较.doc不同翅片形式管翅式换热器流动换热性能比较
不同翅片形式管翅式换热器流动换热性能比较
摘 要：随着制冷空调行业的发展,人们已经把注意力集中在高效、节能节材的紧凑式换热器的开发上,而翅片管式换热器正是制冷、空调领域中所广泛采用的一种换热器形式。对于它的研究不仅有利于提高换热器的换热效率及其整体性能,而且对改进翅片换热器的设计型式,推出更加节能、节材的紧凑式换热器有着重要的指导意义。
由于翅片管式换热器在翅片结构形式和几何尺寸的不同,造成其换热性能和阻力性能上的极大差异。本文概述目前国内外空调制冷行业中的普遍采用的几种不同翅片类型（平直翅片、波纹翅片、开缝翅片、百叶窗形翅片）的换热及压降实验关联式及其影响因素，对不同翅片形式的管翅式换热器的换热及压降特性的实验关联式进行总结，并对不同翅片的流动换热性能进行了比较。正确地选用实验关联式及性能指标，将对翅片管式换热器的优化设计及其制造提供可靠的依据。
关键词：翅片形式；管翅式；换热器；关联式；流动换热性能
Study on heat transfer and flow characteristics of fin-and-tube heat exchangers with various fin types
Abstract： With the development of refrigeration and air conditioning, high efficiency, energy saving and material saving compact type of heat exchanger is development, as one kind of compact heat exchanger, fin-and-tube heat exchanger has a wide application in future. It is necessary to develop compact heat exchanger which is more energy saving and material saving to improve the heat exchanger thermal efficiency and the overall performance of heat transfer.
This paper summaries the heat transfer and pressure drop correlations of different fin surfaces, and the corresponding influencing factors. The heat transfer and friction characteristic of these kinds of fin types are compared, and the results show the difference of these fin types. The appropriate correlation and evaluation criterion will provide reliable foundation to the design and optimization of compact heat exchangers.
Key words： Fin-and-tube heat exchanger; Heat transfer and flow characteristics; Experimental correlations; Comparison


目录
1 绪论 2
1
1
2
管翅式换热器的换热过程 2
3
国外实验及模拟研究进展 3
国内研究现状和数值模拟 4
管翅式换热器及发展趋势 6
管翅式换热器的不同形式的翅片研究现状 7
2影响翅片换热和压降性能的主要结构因素 9
10
10
11
11
3．不同翅片经验关系式总结及比较 12
平直翅片经验关系式的总结 12
波纹翅片经验关系式的总结 16
百叶窗翅片经验关系式的总结 21