Wong-Sandler新型混合规则应用于MKS状态方程

[WT4”,4HZ]Modified Kumar Starling Equation of State with Wong Sandler Type Mixing Rules: The MKS/2 Model

为了将ＭｏｄｉｆｉｅｄＫｕｍａｒ－Ｓｔａｒｌｉｎｇ立方型状态方程用于近临界及多种类流体混合物的计算，采用作者提出的将Ｗｏｎｇ－Ｓａｎｄｌｅｒ型混合规则推广到普遍化立方型状态方程的方法，建立了改进的ＭＫＳ／２模型。经各类体系的计算考核，ＭＫＳ／２模型对于各类体系的近临界相态行为及非对称体系相平衡计算的改进是显著的。

The modified Kumar Starling equation of state proposed by Chu et al (1992) has been improved in order to apply it to near critical phase region for various kinds of fluid mixtrurs. The new type Wong Sandler mixing rule (Yang, et al., 1996) which can be used in multiparameter cubic equations of state was used in the MKS equation of state instead of simple vdW type mixing rule. The test results for selected VLE and volumetric date indicated that the MKS/2 model is capable of describing the phase behavior in the near critical region satisfactorily. Especially, the improvement for asymmetric systems is impressive.