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本文构建了一个包含正癸烷、异辛烷、甲苯和甲基环己烷的柴油表征燃料模型。基于解耦法构建了一个包含70种组分和193个反应的柴油表征燃料的骨架机理。在解耦法中,骨架机理被分为两部分:一部分是极其简化的C_2-C_n机理,用于预测燃料的滞燃期和消耗;另一部分为详细的H_2/CO/C_1机理,用于预测火焰速度和熄火极限,以及碳氢和一氧化碳的排放。通过与激波管中的滞燃期、搅拌反应器(JSR)中的组分浓度、层流火焰速度以及预混压燃(PCCI)发动机中的燃烧和排放的实验数据对比,发现机理较好地预测了柴油的着火、燃烧和排放特性。
This paper builds a diesel fuel model that includes n-decane, isooctane, toluene and methylcyclohexane. Based on the decoupling method, a skeletal mechanism of fuel containing 70 components and 193 reactions was constructed. In the decoupling method, the skeleton mechanism is divided into two parts: one is the extremely simplified C_2-C_n mechanism, which is used to predict the fuel burnup period and consumption; the other is the detailed H_2 / CO / C_1 mechanism, which is used to predict Flame speed and flameout limit, as well as hydrocarbon and carbon monoxide emissions. The experimental results show that the mechanism is better than the experimental data of the ignition delay in shock tube, the concentration of components in the stirred reactor (JSR), the laminar flame velocity and the combustion and emission in the premixed compression ignition (PCCI) engine To predict the ignition, combustion and emission characteristics of diesel.