DME噴霧着火バイオガス・都市ガス混合燃料エンジンにおける化学動力学に基づく3次元燃焼解析のための素反応スキームの構築

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  • Construction of Elementary Reaction Scheme for Three-Dimensional Combustion Analysis Based on Chemical Kinetics in Bio Gas and City Gas Mixture Fueled Engines Ignited with DME Spray
  • DME フンム チャッカ バイオガス トシ ガス コンゴウ ネンリョウ エンジン ニ オケル カガク ドウリキガク ニ モトズク 3ジゲン ネンショウ カイセキ ノ タメ ノ ソハンノウ スキーム ノ コウチク

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Bio gas fueled engines have proved effective in helping the environment; such as reducing methane gas which has a large greenhouse effect, alongside an ozone layer destructing effect, because the main composition of bio gas is methane, and it is not emitted into the atmosphere, but burned up within the engine. In this study, by combining the GRI-Kojima reduced elementary reaction scheme and the DME reduced elementary reaction scheme, which had been constructed by the authors' group, the authors constructed a reduced elementary reaction scheme originally for the mixture of bio gas, city gas, DME and air for investigating the combustion characteristics of a bio gas and city gas mixture fueled engine which was ignited with DME (dimethyl ether) spray. On the basis of chemical kinetics with the proposed elementary reaction scheme, the authors conducted three-dimensional numerical analysis of the combustion process within a practical computation time in a bio gas and city gas mixture fueled engine which was ignited with a small amount of DME spray, using different mixture ratios of bio gas and city gas.

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