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高等学校化学研究 ›› 2014, Vol. 30 ›› Issue (3): 480-488.doi: 10.1007/s40242-014-3460-0

• Articles • 上一篇    下一篇

Mechanism Construction and Simulation for High-temperature Combustion of n-Propylcyclohexane

GUO Junjiang1, WANG Jingbo1, HUA Xiaoxiao1, LI Zerong2, TAN Ningxin1, LI Xiangyuan1   

  1. 1. College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China;
    2. College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
  • 收稿日期:2013-10-24 修回日期:2014-01-17 出版日期:2014-06-01 发布日期:2014-03-05
  • 通讯作者: TAN Ningxin E-mail:tanningxin@scu.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China (No.91016002).

Mechanism Construction and Simulation for High-temperature Combustion of n-Propylcyclohexane

GUO Junjiang1, WANG Jingbo1, HUA Xiaoxiao1, LI Zerong2, TAN Ningxin1, LI Xiangyuan1   

  1. 1. College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China;
    2. College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
  • Received:2013-10-24 Revised:2014-01-17 Online:2014-06-01 Published:2014-03-05
  • Contact: TAN Ningxin E-mail:tanningxin@scu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China (No.91016002).

摘要:

A detailed mechanism covering 545 species and 3105 reactions for high-temperature combustion of n-propylcyclohexane(n-PCH), generated via a mechanism generation program(ReaxGen) developed by our research group, was validated in this study. A semi-detailed mechanism involved with 195 species and 573 reactions and a skeletal mechanism concerned with 108 species and 393 reactions were obtained by means of rate-of-production analysis and path flux analysis(PFA), respectively. In order to validate the reliability of these mechanisms, ignition delay time, laminar flame speed and concentration profiles of important species were simulated with the help of CHEMKIN software. Numerically predicted results of our mechanisms are in very good agreement with available experimental data. Finally, major reaction pathways of n-PCH combustion and important reactions during the combustion process were investigated by reaction pathway analysis and sensitivity analysis, respectively. The results indicate that these mechanisms are reliable for describing the auto-ignition characteristics of n-PCH. These mechanisms would also be helpful to computational fluid dynamics(CFD) for engine design. Moreover, this systematic approach used in our study, which combines mechanism construction, simplification, validation and analysis for n-PCH, may also be employed to construct mechanisms for the high-temperature combustion of other cycloalkanes with one ring.

关键词: n-Propylcyclohexane, Mechanism reduction, High-temperature combustion, Validation of mechanism

Abstract:

A detailed mechanism covering 545 species and 3105 reactions for high-temperature combustion of n-propylcyclohexane(n-PCH), generated via a mechanism generation program(ReaxGen) developed by our research group, was validated in this study. A semi-detailed mechanism involved with 195 species and 573 reactions and a skeletal mechanism concerned with 108 species and 393 reactions were obtained by means of rate-of-production analysis and path flux analysis(PFA), respectively. In order to validate the reliability of these mechanisms, ignition delay time, laminar flame speed and concentration profiles of important species were simulated with the help of CHEMKIN software. Numerically predicted results of our mechanisms are in very good agreement with available experimental data. Finally, major reaction pathways of n-PCH combustion and important reactions during the combustion process were investigated by reaction pathway analysis and sensitivity analysis, respectively. The results indicate that these mechanisms are reliable for describing the auto-ignition characteristics of n-PCH. These mechanisms would also be helpful to computational fluid dynamics(CFD) for engine design. Moreover, this systematic approach used in our study, which combines mechanism construction, simplification, validation and analysis for n-PCH, may also be employed to construct mechanisms for the high-temperature combustion of other cycloalkanes with one ring.

Key words: n-Propylcyclohexane, Mechanism reduction, High-temperature combustion, Validation of mechanism