| 矩形缩放管间插入旋流片的传热实验研究 |
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| 引用本文： | 何兆红,邓先和,管志樟,李志武.矩形缩放管间插入旋流片的传热实验研究[J].化学工程,2010,38(3). |
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| 作者姓名： | 何兆红 邓先和 管志樟 李志武 |
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| 作者单位： | 华南理工大学,传热强化与过程节能教育部重点实验室,广东,广州,510640 |
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| 基金项目： | 国家自然科学基金资助项目(20776046) |
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| 摘 要： | 为了研究新型换热器——矩形管束换热器的传热性能,采用矩形缩放管间插入一组旋流片来研究旋流片下游的传热与流阻性能,并与光滑矩形管的传热和流阻进行比较。实验结果表明:在实验范围内(19 000Re44 000),随着下游距离的增大,旋流片产生的自旋流逐渐衰减,局部Nu数和阻力系数减小,并且局部Nu数的下降速度要慢于阻力系数的;当下游距离在0—200 mm时,阻力系数下降的程度较大;旋流片下游在得到强化传热的同时,阻力增加也很大。
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| 关 键 词： | 矩形管束换热器 矩形缩放管 旋流片 |
Experimental investigation on heat transfer characteristics of converged-diverged rectangle tube inserted with twisted-leaves |
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| HE Zhao-hong,DENG Xian-he,GUAN Zhi-zhang,LI Zhi-wu.Experimental investigation on heat transfer characteristics of converged-diverged rectangle tube inserted with twisted-leaves[J].Chemical Engineering,2010,38(3). |
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| Authors: | HE Zhao-hong DENG Xian-he GUAN Zhi-zhang LI Zhi-wu |
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| Affiliation: | Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education;South China University of Technology;Guangzhou 510640;Guangdong Province;China |
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| Abstract: | To study the heat transfer performance of a new type heat exchanger-rectangle tube bundle heat exchanger,the characteristics of heat transfer and flow resistance of the converged-diverged rectangle tube supported by twisted-leaves were investigated experimentally and compared with those of rectangle tube of smooth plates.The experiment shows that when Reynolds number is in the range of 19 000-44 000,the free swirl flow gradually decays,the local Nusselt number and friction factor decrease when the distance ... |
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| Keywords: | rectangle tube bundle heat exchanger rectangle converged-diverged tube twisted-leaf |
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