Simulation of N-Butanol/Diesel Combustion and Emissions on Start of Injection

Abstract

This paper mainly studies the effected of fuel injection time on combustion and emissions of the four kinds of different proportions of N-butanol alcohol and diesel fuel mixed without changing the injection duration and mass under the software of FIRE. It provides the theory basis for the further development and wide application of N-butanol alcohol as an alternative fuel. Research shows that when the angle of injection advance increases, the circulation work in cylinder, temperature and pressure will increase, the accumulated heat release remain unchanged, the formation of NOX will increase, the total amount of the soot generated almost stay unchanged; when the angle of injection advance decreases, the circulation work, the temperature and pressure in cylinder can be reduced, the accumulated heat release decrease slightly, the formation of NOX decreased significantly, the generation of soot increases slightly. Under the same injection time, with the increase of N-butanol alcohol in the mixed fuel ratio, pressure and temperature in cylinder rise, the accumulated heat release basically remains unchanged; total NOX formation increases after decreased first, the amount of total soot formation shows a trend of decrease.