The impact of n-alkanes (C17~C18) on the physical properties of kerosene

including kinematic viscosity

density and surface tension was dicussed

and the effects of n-alkanes (C17~C18) on SMD (Sauter mean diameter) were investigated. The density fitting equation used Key's blending law

Tat blending law and polynomial fitting. The viscosity fitting equation used Key's blending law and logarithmic fitting. This fitting equation in this investigation have optimal accuracy. The atomization experiment shows that the SMD of blending fuels increases with the mass percentage of n-alkanes

which means that the added n-alkanes have negative effect to the atomization performance. The SMD of C18 blending fuels is larger than C17 blending fuels'. The fitting equation of physical properties are used to predict SMD of the blending fuels

and its error is less than 0.3%.