| 大空间和毛细管内液氮池沸腾传热的实验研究 |
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| 引用本文： | 任欣,张鹏,王如竹. 大空间和毛细管内液氮池沸腾传热的实验研究[J]. 低温与超导, 2005, 33(3): 20-24 |
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| 作者姓名： | 任欣 张鹏 王如竹 |
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| 作者单位： | 上海交通大学制冷与低温工程研究所,上海,200030;上海交通大学制冷与低温工程研究所,上海,200030;上海交通大学制冷与低温工程研究所,上海,200030 |
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| 基金项目： | 国家自然科学基金，全国高等学校优秀博士学位论文作者专项基金，新世纪优秀人才支持计划 |
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| 摘 要： | 文中以直径50μm,长20mm的磷青铜丝作为加热丝和测温元件,采用控制热流密度的方式测量了0°,30°,60°和90°倾角下大空间和玻璃毛细管内液氮的沸腾曲线,分析了毛细管对核态沸腾传热的影响以及管径和倾角对临界热流密度的综合影响。结果表明,在实验管径内,毛细管对于核态沸腾传热有明显的强化作用;并存在一最佳管径,可在30°~90°倾角范围内获得最大的CHF值,并且其值高于大空间时的CHF。
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| 关 键 词： | 液氮 沸腾传热 加热丝 强化换热 毛细管 |
| 修稿时间： | 2005-01-08 |
Experimental Research on Pool Boiling Heat Transfer of Liquid Nitrogen in Open Space and Capillary Tubes |
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| Ren Xin,Zhang Peng,Wang Ruzhu. Experimental Research on Pool Boiling Heat Transfer of Liquid Nitrogen in Open Space and Capillary Tubes[J]. Cryogenics and Superconductivity, 2005, 33(3): 20-24 |
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| Authors: | Ren Xin Zhang Peng Wang Ruzhu |
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| Abstract: | Heated by a 20mm long phosphorous bronze wire with a diameter of 50μm, boiling curves of liquid nitrogen in open space and in capillary tubes are measured under different inclinations. The effects of capillary tube on nucleate boiling heat transfer and the combined effects of confinement and inclination on CHF are analyzed. It is shown that capillary tubes can enhance nucleate boiling heat transfer to a large extent in the experiment. And the experimental results indicate that there will be a best diameter value, around which the highest CHF can be achieved. |
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| Keywords: | Liquid nitrogen Boiling heat transfer Wire Heat transfer improvement Capillary tube |
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