Combustion and fragmentation of droplets of fuel oil/water emulsions.

Abstract

The research aims to determine the ignition behavior and anthropogenic emissions of fuel oil/water emulsions containing additives based on several aliphatic hydrocarbons, fatty acids, and a combination of positive and negative ions, as well as to identify the characteristics of secondary atomization of droplets of such fuels. The demand for fuel oil is buoyant: maritime transportation, production of heat, and power. To reduce harmful emissions and improve the fuel combustion characteristics, specialized additives are introduced into fuel oil. They lower the cost of heat production. Fuel additives offer several benefits, like improved operational characteristics of the boiler and lower fuel consumption. The conducted research revealed that the additive based on a particular combination of positively and negatively charged ions cuts down the ignition delay times of fuel droplets by 10-20% and anthropogenic emissions by 10-15%, and at the same time increase the reaction area of combustion by 20%. The findings indicate that specialized additives to fuel oil/water emulsions improve the characteristics of secondary atomization of droplets in the collisions with a solid surface, which leads to more efficient micro-explosive fragmentation. Predictive approximation equations for sustainable fragmentation of droplets were obtained by evaluating the data obtained in the experiments with "fuel droplet-solid surface" collisions.