Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (9): 1752-1764.doi: 10.3866/PKU.WHXB201704273

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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)

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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