エンジン燃焼のCFDにおける壁面消炎モデル(熱工学,内燃機関,動力など)

抄録

Wall-quenching model is proposed to estimate unburned hydrocarbon emission from SI gas engine in a CFD simulation. Flame is assumed to be quenched when flame approaches within the wall quenching area, in which rate of the heat loss to the wall is superior to that of heat release. The results show that the quench distance is well predicted for variety of wall temperatures, equivalence ratios and pressures. The spatial profiles of heat release rate, local temperature, quenching distance and unburned hydrocarbon are investigated to catch the information about the unburned hydrocarbon formation mechanism.