翅片结构对双向开缝翅片管换热器性能的影响

发布时间：2018-10-24 06:55

【摘要】：为了获得翅片结构对双向开缝翅片管换热器传热与阻力性能的影响规律,对不同翅片间距Pf和开缝高度Sh的双向开缝翅片管换热器进行了数值模拟,并对数值模拟结果进行了模化试验验证。结果表明:当Re7200时,增大Pf会提高双向开缝翅片管换热器的传热与阻力性能;当Re7200时,减小Pf会提高其传热性能,降低其阻力性能;随着Sh的增加,双向开缝翅片管换热器的传热性能先降低后提高,阻力性能先提高后降低;对于不同翅片结构的5种双向开缝翅片管换热器,Pf越大,综合流动传热性能越高,但实际换热面积会减小,需综合考虑;在Re=2734~6712范围内数值模拟与试验结果吻合较好,数值模拟能较准确地反映双向开缝翅片管换热器的传热与阻力特性。研究成果可为双向开缝翅片管换热器的结构与性能优化提供依据。
[Abstract]:In order to obtain the influence of fin structure on heat transfer and resistance performance of bidirectional finned tube heat exchanger, the numerical simulation of bidirectional finned tube heat exchanger with different fin spacing Pf and slit height Sh was carried out. The numerical simulation results are verified by simulation test. The results show that when Re7200 increases, the heat transfer and resistance performance of bidirectional finned tube heat exchangers will be improved by increasing Pf; when Re7200, decreasing Pf will improve its heat transfer performance and reduce its resistance performance; with the increase of Sh, The heat transfer performance of bidirectional finned tube heat exchangers decreases first and then increases, and the resistance performance increases first and then decreases. For five kinds of bidirectional finned tube heat exchangers with different fin structures, the larger the Pf is, the higher the comprehensive flow heat transfer performance is. However, the actual heat transfer area will be reduced, which needs to be considered comprehensively. The numerical simulation results agree well with the experimental results in the Re=2734~6712 range, and the numerical simulation can accurately reflect the heat transfer and resistance characteristics of the bidirectional finned tube heat exchanger. The results can be used to optimize the structure and performance of two-way finned tube heat exchangers.
【作者单位】：上海理工大学上海市动力工程多相流动与传热重点实验室;
【分类号】：TK172

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