抄録
LES of Diesel spray flame has been conducted using KIVA-LES code where flamelet model is incorporated to improve the modeling of the diesel spray flame. To reduce the computational cost, the ignition reaction is simulated with Shell model, while the combustion is modeled using FTS model with one-step reaction. The results show that the unsteady process of diesel spray flame was predicted with flamelet approach, although the 333 hour is needed to simulate 5.0 ms after start of injection. Furthermore the mixture fraction and temperature map shows that the combustion phase is complicated significantly compared to the jet flame, because the droplet evaporation is affected on the fuel vapor supply and cooling locally in the diesel spray flame.
