| 微重力下微结构表面强化沸腾换热研究 |
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| 引用本文： | 薛艳芳,魏进家,赵建福,李晶,郭栋,万士昕.微重力下微结构表面强化沸腾换热研究[J].工程热物理学报,2012(3):441-444. |
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| 作者姓名： | 薛艳芳 魏进家 赵建福 李晶 郭栋 万士昕 |
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| 作者单位： | 西安交通大学动力工程多相流国家重点实验室;中国科学院力学研究所微重力重点实验室(国家微重力实验室) |
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| 基金项目： | 国家自然科学基金资助项目(No.10972225);北京中科院国家微重力重点实验室落塔资助项目 |
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| 摘 要： | 为了提高航天器中电子器件的冷却效率,本文利用干式腐蚀方法形成方柱微结构,通过控制加热电流方法,在北京落塔进行了持续3.6 s有效微重力时间的过冷FC-72池沸腾强化换热实验研究。研究结果表明:相比光滑表面,方柱微结构表面利用其独立于重力水平的毛细作用力,显著地强化了微重力沸腾换热。
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| 关 键 词： | 池沸腾 微重力 方柱微结构 毛细作用力 强化换热 |
Boiling Heat Transfer Enhancement by Using Micro-Structure Surface Under Microgravity |
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| XUE Yan-Fang,WEI Jin-Jia,ZHAO Jian-Fu,LI Jing,GUO Dong,WAN Shi-Xin.Boiling Heat Transfer Enhancement by Using Micro-Structure Surface Under Microgravity[J].Journal of Engineering Thermophysics,2012(3):441-444. |
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| Authors: | XUE Yan-Fang WEI Jin-Jia ZHAO Jian-Fu LI Jing GUO Dong WAN Shi-Xin |
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| Institution: | 1.State Key Lab.of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China; 2.Key Lab.of Microgravity(National Microgravity Laboratory).Institute of Mechanics, Chinese Academy of Sciences,Beijing 100190,China) |
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| Abstract: | For the purpose of cooling electronic devices in space systems with high heat flux efficiently, experiments of highly subcooled pool boiling of FC-72 on micro-pin-finned surface structure were studied in short-term microgravity utilizing Drop-Tower Beijing with duration of about 3.6 s.The micro-pin-fins were fabricated on the silicon chip surface with the dry etching technique.The silicon chip was heated by means of controlling heating dc current for the desired heat flux.The bubble behavior for a smooth surface was also provided for comparison.The results indicated that the performance of high efficient heat transfer on micro-pin-finned surface is independent of the gravity, which stems from the sufficient supply of fresh liquid to the heater surface due to the capillary forces. |
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| Keywords: | pool boiling microgravity micro-pin-fin capillary force enhanced boiling heat transfer |
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