Investigation of Methane/Diesel RCCI Combustion and Emissions at Full Load State Condition by Multi-Dimensional Modeling

As a result of recent focus on the control of Low Temperature Combustion (LTC) modes, dual-fuel combustion strategies such as Reactivity Controlled Compression Ignition (RCCI) have been developed. In this study, Considering the FIRECHEMKIN algorithm, a numerical approach is devised to assess the temperature and concentration effect of intake methane as a low reactive fuel in the combustion and emission characteristics of RCCI combustion to evaluate the parameters involved in this study, the calculations are performed at full load state at the engine speed of 1400 rpm in which the worst engine condition regarding exhaust gas emissions is occurred. The results demonstrate that the increment of intake temperature does not necessarily lead to a higher cylinder temperature and pressure. Furthermore, the role of equivalence ratio is more dominant compared to the role of intake temperature for the net production of Soot in the EVO. The conclusions can open a new prospect for the future researches.