SCI和EI收录∣中国化工学会会刊

›› 2016, Vol. 24 ›› Issue (12): 1719-1727.DOI: 10.1016/j.cjche.2016.05.014

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

Kinetic effects of nanosecond discharge on ignition delay time

Xingqian Mao, Guoxiu Li, Qi Chen, Yujun Zhao   

  1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Received:2016-03-24 Revised:2016-05-19 Online:2017-01-04 Published:2016-12-28
  • Supported by:
    Supported by the National Natural Science Foundation of China (No. 51376021) and the Fundamental Research Funds for the Central Universities (No. 2015YJS146).

Kinetic effects of nanosecond discharge on ignition delay time

Xingqian Mao, Guoxiu Li, Qi Chen, Yujun Zhao   

  1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
  • 通讯作者: Qi Chen,E-mail address:qchen@bjtu.edu.cn
  • 基金资助:
    Supported by the National Natural Science Foundation of China (No. 51376021) and the Fundamental Research Funds for the Central Universities (No. 2015YJS146).

Abstract: The effects of nanosecond discharge on ignition characteristics of a stoichiometric methane-air mixture without inert diluent gas were studied by numerical simulation at 0.1 MPa and an initial temperature of 1300 K. A modified non-equilibrium plasma kinetic model was developed to simulate the temporal evolution of particles produced during nanosecond discharge and its afterglow. As important roles in ignition, path fluxes of O and H radicals were analyzed in detail. Different strength of E/N and different discharge duration were applied to the discharge process in this study. And the results presented that a deposited energy of 1-30 mJ·cm-3 could dramatically reduce the ignition delay time. Furthermore, temperature and radicals analysis was conducted to investigate the effect of non-equilibrium plasma on production of intermediate radicals. Finally, sensitivity analysis was employed to have further understanding on ignition chemistries of the mixture under nanosecond discharge.

Key words: Nanosecond discharge, Ignition delay time, Methane, Kinetic modeling, Numerical simulation

摘要: The effects of nanosecond discharge on ignition characteristics of a stoichiometric methane-air mixture without inert diluent gas were studied by numerical simulation at 0.1 MPa and an initial temperature of 1300 K. A modified non-equilibrium plasma kinetic model was developed to simulate the temporal evolution of particles produced during nanosecond discharge and its afterglow. As important roles in ignition, path fluxes of O and H radicals were analyzed in detail. Different strength of E/N and different discharge duration were applied to the discharge process in this study. And the results presented that a deposited energy of 1-30 mJ·cm-3 could dramatically reduce the ignition delay time. Furthermore, temperature and radicals analysis was conducted to investigate the effect of non-equilibrium plasma on production of intermediate radicals. Finally, sensitivity analysis was employed to have further understanding on ignition chemistries of the mixture under nanosecond discharge.

关键词: Nanosecond discharge, Ignition delay time, Methane, Kinetic modeling, Numerical simulation