液体混合物导热系数预测模型  

Prediction and Correlation of the Thermal Conductivity of Liquid Mixtures

作　　者：许瑶娜 赵小明[1] XU Yao-Na;ZHAO Xiao-Ming(MOE Key Laboratory of Thermo-Fluid Science and Engineering,Xi’an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学热流科学与工程教育部重点实验室,西安710000

出　　处：《工程热物理学报》2020年第5期1077-1080,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51676160);国家自然科学基金创新群体(No.51721004)。

摘　　要：以质量分数加和法为估算液体混合物导热系数的基础上,考虑液体混合物中各组分导热系数的比值对混合物导热系数的影响,通过回归拟合修正质量加和法,导出了一种相关参数少,适用范围广且精度高的混合物导热系数关联式。利用该关联式计算了二组分及三组分液体混合物的37个物系38组858个导热系数,将计算值与质量加和法、幂律法、陈则韶方程等式计算结果进行比较,其总平均相对偏差为0.29%,最大相对误差不超过2.7%。A new correlation to estimate the thermal conductivity of liquid mixtures on the basis of mass fraction addition method is proposed.The prediction considers the effect of the ratio of the thermal conductivity of each component in liquid mixtures to the thermal conductivity of liquid mixtures.By way of regression fitting modified mass fraction method,a thermal conductivity of liquid mixtures correlation was developed,which has the characteristics of less correlation parameters,wide range of application and high accuracy.858 thermal conductivities of 37 systems of two-component and three-component liquid mixtures were calculated by the correlation,and the result were compared with those of mass fraction method,power law method and Chen equation.The total average relative deviation is 0.29%and the maximum relative error is no more than 2.7%.

关 键 词：导热系数 液体混合物 预测方程 

分 类 号：TK121[动力工程及工程热物理—工程热物理]