Automatic Reduction of DME Detailed Elementary Reaction Scheme for Combustion Simulation in DME-Fueled Homogeneous Charge Compression Ignition Engines

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In this study, we investigate the automatic reduction of dimethyl ether (DME) detailed elementary reaction scheme for three-dimensional combustion simulation in DME-fueled homogeneous charge compression ignition (HCCI) engines. This study was conducted using the authors' original software tool“Automatic Scheme Reduction Tool (ASRT) ”. For improving the overall capability of ASRT tool, an additional function was incorporated. While the previous ASRT constructs a reduced elementary reaction scheme in consideration of the rate of heat release, the new ASRT constructs a reduced scheme in consideration of the histories of prescribed chemical species as well. As a result, it has been shown that several DME reduced elementary reaction schemes, whose prediction accuracy depends on prescribed evaluation criteria in ASRT, can now be constructed automatically.