Droplet evaporation characteristics of hydrogenated biodiesel-ethanol-diesel ternary fuel

Abstract

ABSTRACT A multi-component blend of highly volatile ethanol with low volatile hydrogenated biodiesel and diesel is the subject of study. The internal vapor bubble dynamics and evaporation characteristics of individual droplets at high temperatures were investigated. The evaporation characteristics of droplet normalized square diameter and droplet lifetime of the blends of hydrogenated biodiesel, ethanol, and diesel were captured by means of the hanging droplet method and high-speed microscopic imaging in a constant temperature heating furnace. It is revealed that the rise in ambient temperature contributes to increasing the evaporation rate of fuel droplets and intensifies the micro explosion during evaporation and shortens the evaporation of droplets to a certain extent; Compared to diesel, the inhibition effect of evaporation is stronger with the increase of hydrogenated biodiesel in binary fuels and compared with binary fuels, ethanol in ternary fuels promotes micro explosions and shortens droplet evaporation; The droplet evaporation of binary fuels shows three typical phases of ethanol domination, ethanol, and diesel co-domination and co-evaporation of all three in sequence.