A study of fuel injection ratio on combustion characteristics by using different type fuels in heterogeneous combustion field

-Especially the effects of premixing and atomization-

Abstract

In recent years, internal combustion engines have been widely used in automobiles and power generators. However, in order to realize a sustainable society, it is necessary to reduce carbon dioxide emissions by using alternative energy sources such as hydrogen and biofuels, and to improve thermal efficiency by improving existing internal combustion engines. As one of the methods to improve thermal efficiency, we are studying a multi-stage impinging injection method that combines multi-stage injection in a heterogeneous combustion field and the impinging method. The use of multi-stage impinging injection method suggests the possibility of reducing unburned fuel components and improving combustion by controlling the ignition delay time. In this study, in order to examine the combustion improvement effect of the multi-stage impinging injection method, we investigated the effects of premixing and fuel atomization by changing the fuel injection rate on the combustion characteristics from the viewpoints of heat release ratio, total burning time, and ignition delay.