物理化学学报 >> 2017, Vol. 33 >> Issue (9): 1752-1764.doi: 10.3866/PKU.WHXB201704273

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适用于HCCI的生物柴油替代混合物简化机理的构建及验证

肖杰1,张博2,郑朝蕾1,*()   

  1. 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400044
    2 北京汽车动力总成有限公司,北京101100
  • 收稿日期:2017-01-12 发布日期:2017-07-05
  • 通讯作者: 郑朝蕾 E-mail:zhengzhaolei@cqu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51376202)

Development and Validation of a Reduced Chemical Kinetic Mechanism for HCCI Engine of Biodiesel Surrogate

Jie XIAO1,Bo ZHANG2,Zhao-Lei ZHENG1,*()   

  1. 1 Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, P. R. China
    2 BAIC Motor Powertrain CO. LTD, Beijing 101100, P. R. China
  • Received:2017-01-12 Published:2017-07-05
  • Contact: Zhao-Lei ZHENG E-mail:zhengzhaolei@cqu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China Program(51376202)

摘要:

在正庚烷以及葵酸甲酯混合物详细机理的基础上,提出了一个适用于均质压燃发动机的生物柴油简化机理模型。该模型包含113种物质以及306个反应,通过路径分析以及温度敏感性分析方法得到。采用实验所得的燃料着火延迟时间、发动机缸内压力以及CO的排放来验证该简化机理的有效性。结果显示简化机理模型同正庚烷以及葵酸甲酯的着火延迟时间保持一致,并且能有效模拟缸内的压力变化过程以及CO的排放。为了进一步验证简化机理的有效性,将简化机理计算结果同详细机理进行对比。结果显示简化机理的缸内压力、缸内温度以及主要物质的变化趋势同详细机理保持一致。因此,简化机理是合理的。

关键词: HCCI, 生物柴油, 葵酸甲酯, 正庚烷, 简化机理

Abstract:

A simplified mechanism of methyl decanoate and n-heptane blend was developed for a homogeneous charge compression ignition engine built from a previously reported detailed mechanism of a methyl decanoate and n-heptane. The simplified mechanism with 113 species and 306 reactions was developed using path flux and temperature sensitivity analyses. The simplified mechanism was validated against the experimental data of ignition delay time, in-cylinder pressure, and CO emissions. Results show that the simplified mechanism not only coincides with the ignition delay time of the methyl decanoate and n-heptane, but also the CO emissions, and can reproduce the variation of in-cylinder pressure. The simplified mechanism can be further validated by comparison with the detailed mechanism, which shows that the simplified mechanism can coincide with the in-cylinder pressure and temperature, and can reproduce the variation tendency of the core components. Thus, the reduced mechanism is a reasonable one.

Key words: Homogeneous charge compression ignition (HCCI), Biodiesel, Methyl decanoate, n-Heptane, Reduced mechanism

MSC2000: 

  • O643