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应用涨落理论讨论了物质亚稳态液汽相变的机理。在考虑液体混合物核化特点基础上 ,从统计热力学涨落理论出发 ,得到了确定液体混合物极限过热温度的一般关系式。借助 P- R状态方程并外推至亚稳态区域 ,用导出的公式对不同条件下的液体混合物系统极限过热温度进行计算 ,并与文献上的 2 60组实验数据进行了比较 ,结果吻合良好
The theory of metastable liquid vapor phase transition is discussed by using the fluctuation theory. Based on the statistical characteristics of the nucleation of the liquid mixture and the statistical thermodynamic fluctuation theory, a general formula for determining the ultimate overheating temperature of the liquid mixture is obtained. With P-R equation of state and extrapolation to the metastable region, the system was used to calculate the system superheat temperature for liquid mixtures under different conditions and compared with the experimental data of 260 groups in the literature, and the results were in good agreement