| 低Re数管内强化对流传热实验研究 |
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| 引用本文： | 王锁芳 高胜勇. 低Re数管内强化对流传热实验研究[J]. 南京航空航天大学学报, 1996, 28(1): 137-140 |
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| 作者姓名： | 王锁芳 高胜勇 |
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| 作者单位： | 南京航空航天大学动力工程系 |
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| 摘 要： | 分别应用螺旋线圈和扭带作为插入物，在Ｒｅ≤２．０×１０３下，研究管内水与管壁的传热强化，与光管传热作了比较分析。并归纳出强化传热Ｎｕ数及流动阻力系数ζ随Ｒｅ的变化规律，反映出螺旋线圈和扭带在低Ｒｅ下有不同程度的强化传热效果，但也相应地增加了流动阻力。文中对两种强化传热元件也作了相应的比较。
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| 关 键 词： | 对流传热；强化；管热交换；流动；阻力；低雷诺数 |
Experimental Study on Intensification of Convection Heat Transfer in Tubes under Low Re |
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| Wang Suofang, Gao Shengyong. Experimental Study on Intensification of Convection Heat Transfer in Tubes under Low Re[J]. Journal of Nanjing University of Aeronautics & Astronautics, 1996, 28(1): 137-140 |
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| Authors: | Wang Suofang Gao Shengyong |
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| Abstract: | The intensification of convection heat transfer in tubes is investigated in the paperfor Re less than or equal to 2. OX 103 by using belieal coils and twisted tapes as inserts, and theresults are compared with that of smooth tube heat transfer. The changes of the Nusselt numbers and flow drag coefficients of intensified heat transfer tubes have been given as Reynoldsnumbers are varied. Heat transfer under low Re can be intensified in various degrees by usingbelieal coil or twisted tape in tube, and the flow drag is also augmented. The results of intensified heat transfer between belieal coils and twisted tapes are compared and analysed. |
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| Keywords: | convection heat transfer intensification tube heat transfer flow drag low Re |
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