| 纯物质亚稳态机理的研究及液体过热亚稳态极限的预测 |
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| 引用本文： | 童景山,梁燕波.纯物质亚稳态机理的研究及液体过热亚稳态极限的预测[J].工程热物理学报,1998(2). |
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| 作者姓名： | 童景山 梁燕波 |
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| 作者单位： | 清华大学化工系!北京，100084，徐州师范大学化学系!徐州，221009 |
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| 摘 要： | 在通常条件下，物质到达该条件下的平衡相变点却没有发生相变，仍然保持相变点以前的形态，这种形态称之为物质的亚稳态。亚稳态分为过冷态和过热态，如图1所示，液体在某压力下在L点应开始蒸发为气体，液体却处于过热亚稳态，曲线CL和CO间的相区为过热区，点O是T2温度下液体过减压的极限点，也是P=Pnor=0.101325MPa下液体的过热极限点，液体状态达到O点必产爆炸式的气化，CO线就是过热极限曲线，也称旋节线。在定容条件下，液体达到过热极限时，产生爆炸式气化，在极短的时间内会产生很大压力。工程上由于过热液失稳引起的蒸汽爆炸带…
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| 关 键 词： | 亚稳态 过热亚稳极限 分子聚集理论 |
STUDY ON THE MECHANISM OF METASTABLE BEHAVIOUR OF PURE SUBSTANCES AND CALCULATION OF SUPERHEAT LIMITS OF LIQUIDS |
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| TONG Jingshan.STUDY ON THE MECHANISM OF METASTABLE BEHAVIOUR OF PURE SUBSTANCES AND CALCULATION OF SUPERHEAT LIMITS OF LIQUIDS[J].Journal of Engineering Thermophysics,1998(2). |
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| Authors: | TONG Jingshan |
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| Abstract: | This paper discusses the mechanism of metastable behaviour of pure substances fromthe theory of molecular aggregation, and derives the calculating formula of superheat limitsof liquid from the equation of state for molecular aggregation. The superheat limits of liquidfor more than 40 pure substances at normal pressure are calculated and compared with theexperimental data. The predicted results show that the proposed equation is fairly fitted theexperimental data. |
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| Keywords: | metastable state superheat limit theory of molecular aggregation |
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