应用Gibbs自由能最小法研究Li/SF6气液浸没燃烧反应

基于Gibbs自由能最小法，对某新型热动力系统采用的L1/SF6气液浸没燃烧反应的相平衡进行了分析计算。根据热力学基本关系式，在多组份体系中元素和电荷守恒的限制条件下，最小化吉布斯自由能，通过拉格朗日倍乘法来解此有约束非线性优化问题，平衡计算结果给出了温度、密度、组分浓度等与混合分数的关系。本文方法同样适用于复杂的非理想、多相流、电解液或非电解液混合物的相平衡计算。

A Study on Li/SF6 Gas-liquid Fuel Combustion with the Minimum of Gibbs Energy

The minimum of Gibbs energy is applied to analyze chemical equilibrium of Li/SF6 gas-liquid fuel combustion used in a novel heat power system. According to the fundamental thermodynamic relations, the minimization of Gibbs energy, subject to element and charge conservation constraints for a multi-element system, is viewed as a nonlinear constrained optimization problem, which is solved using the method of Lagrange multipliers. Results of equilibrium calculations include temperature, density, and species concentrations as functions of mixture fraction. The method can also be used to calculate complex chemical equilibrium of non-ideal, multiphase, electrolytic or non-electrolytic mixtures.