Modeling of soot formation in a tractor diesel engine running on methanol and methyl ether of rapeseed oil

Abstract

When studying the process of formation of soot nuclei in a flame, it is necessary to pay attention to the sequence of chemical transformations of fuel molecules in order to determine the concentration of dangerous toxic components in the exhaust gases (EG) of a diesel internal combustion engine (DICE). Today, numerous studies are being conducted to establish a detailed kinetic mechanism of the process of carbon condensation and gasification in a DICE. Despite significant progress in understanding the essence and some regularities of the processes occurring in a DICE, it is not yet possible to compile a numerical model that can predict the main indicators of soot content. A semi-empirical mathematical model of soot formation and burnout in a DICE is presented, compiled on the basis of a kinetic model that reliably predicts the dynamics of soot content in the cylinder and the concentration of soot in the EG in a wide range of operating modes of a DICE. The model makes it possible to facilitate the process of studying the factors of soot formation and reduce the cost of conducting experimental studies related to the search for alternative fuels and improving the design of a DICE, optimizing the operation of fuel supply and gas distribution systems.

Effect of Different Droplet Impinging Models on Oil Film Formation of Diesel Engine’s Piston

“…Splash is one of the most important, complex, and often observed phenomena in engineering practice. The result of the splash was that many small droplets bounce off the impinging location, and the properties of these secondary droplets are statistically modelled by the formula derived by Han et al [1][2][3][4][5][6] . The mass of the droplets show some specific connection, and the mass ratio of secondary droplets and impinging droplets can be analyzed through mathematical models.…”