Numerical Study on the Required Surrounding Gas Conditions for Stable Autoignition of an Ethanol Spray

Table 1

Fuel properties.

Properties	Fuel notation
	Ethanol	Gas oil
Stoichiometric A/F ratio Lth (kg/kg)	9.01	14.6
Density ρf (kg/m^3)	785	825
Specific heat (liquid) cfl (kJ/(kg·K))	2.723	2.372
Specific heat (gas) cfg (kJ/(kg·K))	2.329	1.915
Boiling point Tb (K)	351.7	443∼663
Heat of evaporation γf (kJ/kg)	854.8	187.2
Minimum ignition point Tig (K)	636	530
Lower heating value Hu (MJ/kg)	26.8	44.4

Under the atmospheric pressure condition.