朱珊云,戴源德,曹杰,陈满
ZHU Shanyun,DAI Yuande,CAO Jie,CHEN Man

• 1:南昌大学先进制造学院

摘要(Abstract)：

为了探究翅片间距P_f和相对开缝高度S_h/P_f对翅片管换热器空气侧传热与阻力特性的影响，以5 mm小管径百叶窗式开缝翅片管换热器为研究对象，利用CFD耦合传热数值模拟并结合对流传热综合性能评价准则进行分析。研究结果表明：在P_f=1.30～1.50 mm范围内，空气侧Nu和阻力系数f均随P_f的增加而减小；在Re=457～2 907范围内，S_h/P_f对开缝翅片管换热器传热性能的影响与Re有关，减小S_h/P_f可以改善空气侧阻力性能和对流传热综合性能；当Re<1 300时，随着P_f的增加，对流传热综合性能先增加后减小，P_f=1.40 mm，S_(h )/P_f=0.40时，对流传热综合性能可达到最佳；当Re>1 300时，增加P_f有利于提高综合传热性能。
In order to investigate the effects of fin pitch P_f and relative slot height S_h/P_f on air-side heat transfer and resistance characteristics，the louvered slotted fin-and-tube heat exchangers with small diameter of 5 mm was taken as the research object，the CFD coupled heat transfer numerical simulation was carried out，and the comprehensive performance evaluation index of heat transfer were adopted for analysis.The research results indicate that when P_f is within the range of 1.30～1.50 mm，both the Nu and resistance factor f decrease with the increase of fin pitch P_f；and when Re=457～2 907，the effect of S_h/P_(f ) on the heat transfer performance of the louvered slotted finned tube heat exchanger is related to Re.The resistance and comprehensive heat transfer performance at air-side can be improved by reducing S_(h )/P_f.When Re<1 300，the comprehensive flow and heat transfer performance first increases and then declines as P_f increases，when P_f=1.40 mm，and S_h/P_f=0.40，the best comprehensive heat transfer performance can be achieved.When Re>1 300，the comprehensive heat transfer performance can be enhanced by increasing P_f.

关键词(KeyWords)： 小管径;开缝翅片;换热器;综合传热性能;数值模拟
small diameter;slotted fin;heat exchangers;comprehensive heat transfer performance;numerical simulation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(22068024)

作者(Author): 朱珊云,戴源德,曹杰,陈满
ZHU Shanyun,DAI Yuande,CAO Jie,CHEN Man

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