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为有助于乙醇柴油混合燃料在柴油机中的燃烧与排放的计算模拟研究,针对体积分数分别为5%、10%、15%的乙醇柴油混合燃料(E5、E10、E15)的理化性质(临界参数、焓值、汽化潜热、粘度、表面张力、导热系数等)进行估算。在Fortran语言的基础上,根据以往已验证的估算公式进行编程计算,结果表明:随着乙醇掺混比的增加,混合燃料的焓值、液体粘度、表面张力和导热系数减小;饱和蒸汽压、气化潜热增加,随温度的升高,混合燃料的焓值和饱和蒸汽压升高,气化潜热、液体粘度、表面张力和导热系数减小。
To simulate the combustion and emission of ethanol-diesel mixed fuel in diesel engine, the physico-chemical properties (E5, E10, E15) of ethanol-diesel mixed fuel with volume fractions of 5%, 10% and 15% Parameters, enthalpy, latent heat of vaporization, viscosity, surface tension, thermal conductivity, etc.). Based on the Fortran language and based on the previously validated estimation formula, the calculation results show that the enthalpy, liquid viscosity, surface tension and thermal conductivity of the mixed fuel decrease with the increase of the ethanol blending ratio. The saturated vapor pressure , The latent heat of vaporization increases. With the increase of temperature, the enthalpy and the saturated vapor pressure of the mixed fuel increase, the latent heat of vaporization, the viscosity of the liquid, the surface tension and the thermal conductivity decrease.