Modeling of DME Engine Combustion Using Detailed Chemical Kinetics with Multidimensional CFD 18ICES/015
Authors
Jin Xiao - Shanghai JiaoTong University
Zhen Huang - Shanghai JiaoTong University
Xiaowu Wang - Shanghai micropowers Ltd
Xinqi Qiao - Shanghai JiaoTong University
Abstract
Dimethyl ether (DME) has been recognized as a prospective alternative fuel for diesel engines because of its good characteristics of excellent auto-ignition quality, low flame temperature combustion and low emissions. In the present study, a model for DME injection process including the fuel injection system characteristics and its effect on spray characteristics is presented here. The model is validated with available experimental data. Detailed chemical kinetics was implemented on a multidimensional CFD code to study the combustion process in a diesel engine. The chemical mechanism of DME consisted of 31 species participating in 291 reversable reactions has been applied to simulation of DME spray combustion regime. The results of ignition delay, engine cylinder pressure, heat release and exhuast emissions have also been compared with experimental data and a good agreement has been demonstrated.