Numerical investigation on evaporative burning characteristics of combustible liquids

This study investigates the evaporation and combustion characteristics of flammable liquid leakage on high-temperature surfaces in aircraft fuel systems through numerical simulation. Based on ANSYS Fluent, a two-dimensional computational model incorporating the VOF multiphase flow model and combustion model was established to simulate the dynamic process of aviation kerosene droplet impact on high-temperature surfaces. The research reveals the spreading, splashing, evaporation, and combustion behaviors of droplets after impact, analyzing the evolution of temperature and concentration fields near the heated surface. These results indicate that droplets undergo intense evaporation upon contact with the high-temperature surface, forming a combustible vapor cloud that can ignite under specific conditions.