中文摘要：

将简化天然气GRI3.0机理与柴油替代机理95/5,vv、氢气详细机理以及污染物生成模型组合，得到含79种组分、244步反应的DNH三燃料机理，通过敏感性分析、重要组分分析，调整化学动力学参数，对DNH机理进行验证．结果表明：DNH机理在当量比0.3～1.0内可准确预测单燃料的滞燃期、重要产物、污染物生成过程；通过CFD耦合DNH机理，在柴油、柴油/天然气和柴油/天然气/氢气三种模式下，模拟值与试验值一致性较好，表明DNH模型可满足发动机缸内燃烧模拟的需求．

英文摘要：

By combining GRI-mech3.0reduced mechanism,diesel surrogate95/5,vv mechanism,hydrogenmechanism and soot generation mechanism,DNH mechanism which consisted of79species and244reactionswas proposed.Then,sensitivity analysis and analysis of important components were made for the adjustment ofArrhenius rate constants in DNH mechanism.DNH mechanism was validated and the results indicated that predictionsfor ignition delay,intermediates and pollutant emissions were in agreement with single detail mechanismrespectively with the equivalent ratio from0.3to1.0.By coupling CFD model with DNH mechanism,the simulationresults agreed well with the experimental data under neat diesel,diesel/natural gas and diesel/naturalgas/hydrogen fueling conditions,which revealed that the DNH model can meet the needs of combustion simulationin the engine cylinder.