首页> 外文期刊>Combustion Science and Technology >COMPUTATIONAL STUDY OF PARTIAL FUEL STRATIFICATION FOR HCCI ENGINES USING GASOLINE SURROGATE REDUCED MECHANISM
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COMPUTATIONAL STUDY OF PARTIAL FUEL STRATIFICATION FOR HCCI ENGINES USING GASOLINE SURROGATE REDUCED MECHANISM

机译:汽油硫酸盐还原机理对HCCI发动机部分燃油分层的计算研究

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摘要

Fuel stratification is a potential strategy for reducing the maximum pressure rise rate in HCCI engines. Simulations of partial fuel stratification (PFS) have been performed using a modified version of KIVA-3V that computes chemistry using CHEMKIN. A novel 96-species reduced mechanism for a four-component gasoline surrogate has been developed from a 312-species skeletal mechanism given by Mehl et al. (2011) using the Computer Assisted Reduction Mechanism algorithm (the detailed mechanism from Lawrence Livermore National Laboratory has about 1400 species and 6000 reactions). The reduced mechanism is validated for ignition delay against the detailed mechanism and experimental shock tube data. Simulations of PFS and homogeneous charge compression ignition (HCCI) engine operation using the gasoline surrogate and PRF73 were performed for a cooperative fuel research (CFR) engine of compression ratio 14:1 at ambient and boosted intake pressures. Analysis of numerical results reveals that the temperature distribution of the mixture stratification dictates whether single-stage or multi-stage combustion is observed for PFS.
机译:燃油分层是降低HCCI发动机最大压力上升率的潜在策略。使用改进版本的KIVA-3V进行了部分燃料分层(PFS)的仿真,该版本使用CHEMKIN计算化学成分。由Mehl等人提出的312种骨骼机制已开发出一种新颖的96种减少四组分汽油替代物的机制。 (2011年)使用计算机辅助还原机制算法(劳伦斯·利弗莫尔国家实验室的详细机制有大约1400种和6000个反应)。简化的机构针对详细的机构和实验冲击管数据进行了点火延迟验证。使用汽油替代品和PRF73对PFS和均质充量压缩点火(HCCI)发动机的运行情况进行了仿真,以研究在环境压力和进气压力升高时压缩比为14:1的合作燃料研究(CFR)发动机。数值结果分析表明,混合物分层的温度分布决定了PFS是否观察到单级或多级燃烧。

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