This study was computationally investigated how DME autoignition reactivity is affected by EGR and intakepressure boost over various engine speed. CHEMKIN-PRO was used as a solver. Autoignition reactivity was mainly studied using contribution matrix. Investigations concentrate on their effects on variations of autoignition characteristics in-detail including reaction rates of dominant reactions. EGR addition results the increase of the burn duration by lowering reaction rates. Combustion timings were very sensitive to boost pressure which enhances the reactivity of intermediate species but burn durations dominantly rely on the EGR addition. Also, high engine speed under EGR addition increases the burn duration greatly. Finally, substantial reduction of peak PRR by controlling LTHR can be obtained through the combination of EGR and boost pressure over engine speeds at high load operation.
|出版ステータス||Published - 2014|
|イベント||6th International Conference on Applied Energy, ICAE 2014 - Taipei, Taiwan, Province of China|
継続期間: 2014 5月 30 → 2014 6月 2
ASJC Scopus subject areas