Abstract:
The effect of the degree of emulsifying diesel fuel DL with water on the ignition lag with its pulsed high-pressure injection into heated air was studied experimentally. It is shown that with relatively small cyclic feed emulsification prolongs ignition and with large cyclic feed, when ignition lag of water-free fuel increases markedly, it accelerates it. The mechanism of cavitation dispersion of the liquid jet during exit from the spray nozzle, determining the flow of the fuel-air mixture, is examined for explaining certain characteristics of the autoignition process. Emulsification of fuel to a considerable extent intensifies cavitation dispersion and thereby affects the course of mixing and, consequently, ignition.
