Numerical Simulation of Auto-ignition Process of Diesel Sprays Using Detailed Chemistry and Representative Flamelet Model

상세 화학 반응 모델 및 RIF 모델을 이용한 디젤 분무의 자발화 과정 해석

The interaction between chemistry and turbulence is treated by employing the Representative Interactive Flamelet (RIF) Model. The detailed chemistry of 114 elementary steps and 44 chemical species is adopted for the n-heptane/air reaction. In order to account for the spatial inhomogeneity of the scalar dissipation rate, the multi-RIF is used. The effect of the number of RIF on ignition delay is discussed in detail. Numerical results indicate that the present RIF approach successfully predicts the ignition delay time as well as the essential features of a spray auto-ignition process.