| 利用密度涨落确定均质核化中流体的极限温度 |
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| 引用本文： | 彭岚 刘朝 等. 利用密度涨落确定均质核化中流体的极限温度[J]. 重庆大学学报(自然科学版), 2001, 24(1): 104-107 |
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| 作者姓名： | 彭岚 刘朝 等 |
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| 作者单位： | 重庆大学热能工程学院!重庆400044 |
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| 基金项目： | 国家自然科学基金资助课题!( 5 95 760 0 3 ) |
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| 摘 要： | 应用统计热力学巨正则系统的密度涨落理论，提出了确定均质沸腾中液体极限过热度和均质凝结中蒸汽极限过冷度的方法。以水及水蒸汽作了不同压力下的相关计算，得出了蒸汽凝结机制较沸腾机制复杂得多的结论，并推测出动力学影响是蒸汽凝结不可忽略的重要因素。
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| 关 键 词： | 热力学 密度涨落 均质沸腾 均质凝结 极限过热度 极限过冷度 |
| 文章编号： | 1000-582x（2001）01-0104-04 |
| 修稿时间： | 2000-04-28 |
Determination of Liquid Superheat Limit and Vapor Subcooling Limit in Homogeneons Nucleation Using Density Fluctuation Theory |
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| PENG Lan,LIU Chao,ZENG Dan ling. Determination of Liquid Superheat Limit and Vapor Subcooling Limit in Homogeneons Nucleation Using Density Fluctuation Theory[J]. Journal of Chongqing University(Natural Science Edition), 2001, 24(1): 104-107 |
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| Authors: | PENG Lan LIU Chao ZENG Dan ling |
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| Abstract: | The liquid superheat limit and vapor subcooling limit in homogeneous nucleation are determined in the present paper by using density fluctuation theory of statistical thermodynamics. Taking water and steam as examples, calculation is performed to predict the superheat limit and subcooling limit of them under different pressure.In conclusion, the mechanism of nucleate condensation of steam is much more complicated than the mechanism of liquid nucleate boiling. It is predicted that the influence of kinetic effects is very important to the vapor nucleate condensation. |
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| Keywords: | density fluctuation homogeneous nucleate boiling homogeneous nucleate condensation superheat limit subcooling lim |
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