Abstract To facilitate the application of clean alternative fuels or fuel additives in compression ignition engines and a better understanding of the characteristics of their combustion and emission, physical biofuel surrogates are necessary to be proposed in computation and the knowledge of their thermophysical properties, such as liquid density, surface tension and viscosity, are also crucial for the design and optimization of the fuel injection system. Therefore, the surface light scattering (SLS) method was adopted for the simultaneous determination of the liquid surface tension and kinematic viscosity of the binary mixtures containing n-hexadecane, methyl butyrate and methyl decanoate in the temperature range between (353.15 and 423.15) K in the present work. Additionally, a U-tube densimeter and refractometer were used to obtain the liquid density and refractive index of the binary mixtures in the temperature range from (293.15–423.15) K and (293.15–358.15) K, respectively. Correlations for all thermophysical properties against temperature and mole fraction were also proposed. The relative deviations of liquid density, refractive index, kinematic viscosity as well as surface tension data from those calculated by the proposed equations were within ±0.3%, ±0.20%, ±2% and ±1%, respectively for the binary systems.

中文翻译：

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接近饱和条件的正十六烷与丁酸甲酯和癸酸甲酯的二元混合物的液体表面张力、运动粘度、密度和折射率

摘要 为了促进清洁替代燃料或燃料添加剂在压燃式发动机中的应用并更好地了解其燃烧和排放特性，需要在计算中提出物理生物燃料替代物并了解其热物理特性，例如液体密度、表面张力和粘度对于燃油喷射系统的设计和优化也至关重要。因此，采用表面光散射（SLS）法同时测定含有正十六烷、丁酸甲酯和癸酸甲酯的二元混合物在（353.15～423.15）K的温度范围内的液体表面张力和运动粘度。现在的工作。此外，使用 U 型管密度计和折射计分别在 (293.15-423.15) K 和 (293.15-358.15) K 温度范围内获得二元混合物的液体密度和折射率。还提出了所有热物理性质与温度和摩尔分数的相关性。对于二元系统，液体密度、折射率、运动粘度以及表面张力数据与由所提出的方程计算的数据的相对偏差分别在±0.3%、±0.20%、±2%和±1%以内。