The evaporation/combustion characteristics of randomly distributed droplets in spray combustion were studied numerically

the randomness of the droplet size

coordinate distribution and number density was considered in detail. The large eddy simulation was carried out by the one step general package reaction mechanism

while the resistance characteristics and evaporation rate of droplets with different number density at different inflow rates and ambient temperatures were analyzed

and the interaction between droplets was analyzed in combination with the combustion modes. The results show that the combustion modes of the droplets include three flame modes (fully-enveloped flame

partially-enveloped flame and wake flame) of a single droplet at the same time. The concentration of ethanol vapor on the surface of each droplet presents asymmetrical distribution

and the core region of the reaction deflects at an angle. In the strongly convective environment

the variation of average surface evaporation rate and resistance coefficient of evaporation/combustion droplets is similar to that of a single evaporation/combustion droplet

the strong interaction between droplets could accelerates the heat and mass transfer of evaporation/combustion of droplets.