| 分层充量压燃简化动力学模型及燃烧机理 |
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| 引用本文： | 郑朝蕾,尧命发. 分层充量压燃简化动力学模型及燃烧机理[J]. 燃烧科学与技术, 2011, 17(2) |
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| 作者姓名： | 郑朝蕾 尧命发 |
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| 作者单位： | 1. 重庆大学低品位能源利用技术及系统教育部重点实验室,重庆,400030
2. 天津大学内燃机燃烧学国家重点实验室,天津,300072 |
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| 基金项目： | 天津大学内燃机燃烧学国家重点实验室开放课题资助项目(SKLE200901) |
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| 摘 要： | 在前期工作的基础上,加入了与浓混合气相关的反应,构建了适合分层压燃的简化动力学模型,包括39种物质和49个基元反应.新构建的分层压燃简化动力学模型,零维模拟的结果与详细机理吻合很好;与三维CFD耦合模拟的结果与预混/直喷条件下的实验结果吻合也很好.对于预混/直喷分层燃烧来说,低温反应最先发生在压缩余隙和凹坑内活塞表面附近的燃料均质分布的区域,而高温反应最先发生在喷雾导致的浓混合气区域.到低温反应结束为止,缸内生成的H2O2和CH2O浓度分布不均匀,混合气较浓的区域生成的H2O2和CH2O浓度较大.高温反应开始后,浓混合气区域温度比燃料均质分布的区域高,因此在较浓的混合气区域,H2O2、CH2O、HCO和CO等重要中间产物消耗的速度都比燃料均质分布的区域快.
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| 关 键 词： | 分层充量压燃 正庚烷 简化动力学模型 燃烧机理 |
Reduced Chemical Kinetics Model and Combustion Mechanism of Charge Stratification Compression Ignition |
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| ZHENG Zhao-lei,YAO Ming-fa. Reduced Chemical Kinetics Model and Combustion Mechanism of Charge Stratification Compression Ignition[J]. Journal of Combustion Science and Technology, 2011, 17(2) |
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| Authors: | ZHENG Zhao-lei YAO Ming-fa |
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| Affiliation: | ZHENG Zhao-lei1,YAO Ming-fa2(1.Key Laboratory of Low-Grade Energy Utilization Technology and Systems,Ministry of Education,Chongqing Univer-sity,Chongqing 400030,China,2.State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China) |
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| Abstract: | In the present study,a reduced kinetics model adapted to charge stratification combustion is first developed based on previous work,which consists of 39 species and 49 elementary reactions.With zero-dimensional model applied,the simulation results from the new reduced model agree well with those from detailed reaction mechanism;with fully cou-pled multi-dimensional CFD and reduced chemical kinetics model applied,the simulation results from the new reduced mechanism agree well with the experimental results.F... |
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| Keywords: | charge stratification compression ignition n-heptane reduced chemical kinetics model combustion mecha-nism |
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