Abstract Physical fuel surrogate is always necessary to be proposed to match physical properties such as liquid density, viscosity and surface tension of the real bio-aviation kerosene for the characteristics of their spray performance. Thus, it is crucial to determine the related thermophysical properties over a wide temperature range for a further development of the fuel spray system. Therefore, binary surrogates of n-decane with ethyl decanoate and ethyl dodecanoate were proposed and their thermophysical properties were investigated in the present work. The liquid density was obtained using a U-tube densimeter in the temperature range between (293.15 and 433.15) K. The liquid kinematic viscosity and surface tension were investigated simultaneously by surface light scattering (SLS) method in the temperature range from (313 to 423) K. Additionally, the refractive index was measured by a refractometer in the temperature range from (278.15 to 358.15) K. Furthermore, correlations for these properties were developed as the function of mole fraction and temperature. The relative deviations of experimental liquid density, kinematic viscosity, surface tension and refractive index from those calculated according to the correlations were within the range of ±0.2%, ±2%, ±1% and ±0.08%, respectively.

中文翻译：

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含有正癸烷的生物航空煤油替代物与癸酸乙酯和十二酸乙酯热物理性质的实验研究及相关性

摘要 物理燃料替代物总是需要被提出以匹配真实生物航空煤油的液体密度、粘度和表面张力等物理性质以适应其喷雾性能的特性。因此，确定在较宽温度范围内的相关热物理特性对于燃料喷雾系统的进一步发展至关重要。因此，提出了正癸烷与癸酸乙酯和十二酸乙酯的二元替代物，并在目前的工作中研究了它们的热物理性质。使用 U 型管密度计在 (293.15 至 433.15) K 之间的温度范围内获得液体密度。在 (313 至 423) K 的温度范围内，通过表面光散射 (SLS) 方法同时研究液体运动粘度和表面张力) K。此外，折射率是通过折射计在 (278.15 到 358.15) K 的温度范围内测量的。此外，这些特性的相关性被开发为摩尔分数和温度的函数。实验液体密度、运动粘度、表面张力和折射率与根据相关性计算的相对偏差分别在±0.2%、±2%、±1%和±0.08%的范围内。