NG发动机等离子体助燃数值模拟

ccording to the combustion characteristics of CNG engine can be intensified by plasma, this article uses the multi-zone model in gas dynamics software CHEMKIN to investigate the effects of different kinds of plasma and ozone on the combustion process of methane. The results show that the plasma can effectively shorten the ignition delay time and the effect of the free radical O enhanced ignition and combustion is more obvious. When adding free radical O with a concentration of 0.5%, the ignition delay time can be advanced by 12.4 degree, and the maximum combustion temperature increases by 182.01K, but the increase of concentration of free radical has little effect on the combustion reaction. In addition, the addition of ozone can promote the generation of free radical O in the combustion process and shorten ignition lag time. With the increase of ozone concentration, the extent of enhanced growth gradually decreases.