| 侧置三角小翼的管翅式换热器特性研究 |
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| 引用本文： | 雷勇冈,何雅玲,楚攀,田丽亭.侧置三角小翼的管翅式换热器特性研究[J].工程热物理学报,2010,31(1). |
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| 作者姓名： | 雷勇冈 何雅玲 楚攀 田丽亭 |
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| 作者单位： | 西安交通大学能源与动力工程学院,动力工程多相流国家重点实验室,陕西西安,710049 |
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| 基金项目： | 国家重点基础研究发展计划项目(973项目)(No.2007CB206902);;国家自然科学基金重点项目(No.U0934005) |
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| 摘 要： | 通过三维数值模拟,对侧置三角小翼纵向涡发生器的顺排和叉排管翅式换热器的流动和传热特性进行了研究。结果表明:在研究的Re数范围内,采用侧置三角小翼措施后,无论对顺排还是叉排管翅式换热器,其换热增强的比例均大于阻力增大的比例;在低Re数时,采用该强化措施的结构比高Re数时具有更优的换热和阻力综合性能。侧置三角小翼强化换热的内在机理可以归结为改善了温度场和速度场的协同性,即减小了速度和温度梯度间的夹角。
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| 关 键 词： | 三角小翼 纵向涡 数值模拟 场协同 |
AN INVESTIGATION OF THE AIRSIDE PERFORMANCE OF FIN-AND-TUBE HEAT EXCHANGERS WITH DELTA-WINGLET |
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| LEI Yong-Gang,HE Ya-Ling,CHU Pan,TIAN Li-Ting.AN INVESTIGATION OF THE AIRSIDE PERFORMANCE OF FIN-AND-TUBE HEAT EXCHANGERS WITH DELTA-WINGLET[J].Journal of Engineering Thermophysics,2010,31(1). |
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| Authors: | LEI Yong-Gang HE Ya-Ling CHU Pan TIAN Li-Ting |
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| Institution: | State Key Laboratory of Multiphase Flow in Power Engineering;School of Energy & Power Engineering;Xi'an Jiaotong University;Xi'an 710049;China |
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| Abstract: | In this paper,3-D numerical simulations are carried out to study the fluid flow and heat transfer of fin-and-tube heat exchangers with delta-winglet vortex generators.The numerical results show that for both the inline tube arrangement and the staggered tube arrangement,the delta-winglet vortex generators can significantly enhance the heat transfer performance of fin-and-tube heat exchangers with relatively low penalty of pressure drop for the Reynolds number range under consideration.The enhanced configura... |
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| Keywords: | delta-winglet longitudinal vortices numerical simulation field synergy |
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