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讨论了正十七烷与正十八烷(C_(17),C_(18))对燃料运动黏度、密度、表面张力理化性能的影响,探究了直链烷烃对SMD(Sauter mean diameter)的影响.将Key’s混合规律、Tat混合规律和多项式拟合应用于密度公式的拟合,并将Key’s混合规律与对数拟合应用于运动黏度公式的拟合,得出的理化性能拟合公式精度较高;通过测量纯煤油及C_(17),C_(18)混合油雾化的SMD,实验发现随着直链烷烃的质量分数的增加,混合油的运动黏度增加,SMD也随之增加,雾化效果与纯航空煤油的相比较差,而C_(18)混合油的SMD要比C_(17)混合油要大,并且利用密度、运动黏度的拟合公式对SMD进行预测的偏差小于0.3%.
The effects of n-heptadecane and n-octadecane (C_ (17) and C_ (18)) on the kinematic viscosity, density and surface tension of the fuel were discussed. The effects of linear paraffin on the Sauter mean diameter The Key’s mixing law, Tat’s mixing law and polynomial fitting were applied to the fitting of density formula, and Key’s mixing law and logarithmic fitting were applied to the kinematic viscosity formula to get the better fitting accuracy of physical and chemical properties By measuring the atomized SMD of pure kerosene and C_ (17) and C_ (18) mixed oils, it was found that with the increase of the mass fraction of linear paraffin, the kinematic viscosity of the mixed oil increased, the SMD also increased, and the fog Compared with the pure aviation kerosene, the effect is worse than that of the pure aviation kerosene. However, the SMD of the C_ (18) mixed oil is larger than that of the C_ (17) mixed oil, and the deviation of the SMD prediction using the fitting formula of the density and the kinematic viscosity is less than 0.3% .