| 毛细管内部核化过程分析 |
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| 引用本文： | 田勇,彭晓峰.毛细管内部核化过程分析[J].航空动力学报,2003,18(2):225-229. |
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| 作者姓名： | 田勇 彭晓峰 |
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| 作者单位： | 清华大学热能工程系,北京100084 |
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| 基金项目： | 国家自然科学基金资助项目(59625612,59976016) |
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| 摘 要： | 针对微细结构内部的核化沸腾特性进行理论和实验研究,利用统计理论分析并且导出受热工质内部沸腾发生所需的过热度,揭示出毛细管道内部空间尺度对核化的影响。实验中,对四种工质(去离子水、甲醇、乙醇、四氯化碳)在毛细管内部的沸腾现象进行了观察和测量,结果表明理论分析与实验观测结果吻合得较好。
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| 关 键 词： | 航空、航天推进系统 毛细管 沸腾核化 统计力学 相变 |
| 文章编号： | 1000-8055(2003)02-0225-05 |
| 收稿时间： | 2002/3/25 0:00:00 |
| 修稿时间： | 2002年3月25日 |
Analysis of Boiling Nucleation in Capillary Tubes |
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| Institution: | Tsinghua University,Beijing100084,China |
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| Abstract: | Theoretical and experimental investigation was conducted to explore microscale boiling nucleation characteristics.By using a statistical mechanics approach,the effect of spatial scale on the bubble nucleation in capillary tubes was analyzed and the superheat temperature of liquid heated in capillary tubes was theoretically derived as a function of spatial scale.The boiling phenomena were observed and the nucleation temperatures were measured for four kinds of fluids (water,methanol,ethanol,and carbon tetrachloride) boiled on a platinum wire confined in capillary tubes.The comparisons indicate reasonable coincidence between theoretical findings and experimental observations. |
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| Keywords: | aerospace propulsion microscale boiling boiling nucleation statistical mechanics phase transition |
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