In-cylinder combustion simulation of 4190 diesel engine with natural gas addition

Inhalt:
Adding natural gas to a diesel engine will affect the in-cylinder combustion and emission of diesel engine, especially nitrogen oxides, carbon monoxide, and soot. To describe the effect of burning natural gas in diesel engines, the present study constructs a three-dimensional simulation model of engine in-cylinder combustion and develops a reduced mechanism suitable for diesel-natural gas dual-fuel engines. The performance of the engine under pure diesel and different proportions of natural gas is calculated. The values calculated by this 3D model include cylinder pressure, cylinder temperature, carbon monoxide, carbon dioxide, nitrogen oxides, soot, and so on. The simulation results show that adding natural gas into the engine intake can effectively increase the fuel combustion temperature in the entire cylinder, increase the production of CO and NO, and effectively increase the engine power.