Effect of the synthesis gas additive on the flame propagation velocity in a gasoline rotary piston engine

Abstract

The results of a theoretical study of the effect of synthesis gas additives to gasoline on the flame propagation velocity in the combustion chamber of a rotary piston engine are presented. The study was carried out using a mathematical model of the flame propagation process in the combustion chamber of a rotary piston engine, taking into account all the features of the geometry and gas dynamics of this type of engines, the effect of free hydrogen additives on the normal flame propagation velocity and the duration of the induction period during spark ignition. The model allows you to determine the propagation velocity of the flame fronts from two spark plugs, both in the longitudinal and transverse direction of the combustion chamber. The patterns of propagation of flame fronts in the combustion chamber of a rotary piston engine when running on gasoline with additives of synthesis gas and hydrogen are obtained. The results of modeling the flame propagation process in a fuel-air mixture with hydrogen and synthesis gas additives in the working chamber of a rotary piston engine allow us to conclude that the addition of synthesis gas, as well as the addition of hydrogen, makes it possible to increase the speed of flame propagation and the completeness of fuel combustion. When the engine is running with synthesis gas additives, a change in the adjustments of the ignition timing angles is required.