微重力下微结构表面强化沸腾换热研究
Boiling Heat Transfer Enhancement by Using Micro-Structure Surface Under Microgravity
查看参考文献12篇
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文摘
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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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其他语种文摘
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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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来源
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工程热物理学报
,2012,33(3):441-444 【核心库】
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关键词
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池沸腾
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微重力
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方柱微结构
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毛细作用力
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强化换热
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地址
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1.
西安交通大学, 动力工程多相流国家重点实验室, 陕西, 西安, 710049
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中国科学院力学研究所, 中国科学院微重力重点实验室(国家微重力实验室), 北京, 100190
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语种
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中文 |
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ISSN
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0253-231X |
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学科
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能源与动力工程 |
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基金
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国家自然科学基金
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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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文献收藏号
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CSCD:4476887
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参考文献 共
12
共1页
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