Modeling of ignition enhancement of CH4/O2 mixtures by non-equilibrium excitation of reactants using hybrid nanosecond-pulsed discharge and DC discharge

Xingqian Mao, Aric Rousso, Qi Chen, Yiguang Ju

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

This work aims to study the ignition enhancement of hybrid nanosecond-pulsed and DC discharges at atmospheric pressure using numerical modeling of CH4/O2 mixtures. A hybrid time splitting method comprising ZDPlasKin and CHEMKIN as well as a plasma mechanism incorporating vibrationally excited species and low temperature CH4 oxidation pathways of O2 (a1g) are developed and validated. The results show that the hybrid discharge is more efficient in ignition enhancement than thermal ignition. The vibrationally excited species and O2 (a1g) are generated efficiently by non-equilibrium excitation in the hybrid discharge. It is found that O2 (a1g) shortens the ignition delay time effectively, whereas CH4(v) and O2(v) contribute to the ignition enhancement by slow gas heating. It is shown that the selective production of active species can be realized at different DC electric field strengths and there exists an optimal condition enhancing the ignition.

Original languageEnglish (US)
Title of host publicationAIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Edition210059
ISBN (Print)9781624105241
StatePublished - Jan 1 2018
EventAIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States
Duration: Jan 8 2018Jan 12 2018

Publication series

NameAIAA Aerospace Sciences Meeting, 2018
Number210059

Other

OtherAIAA Aerospace Sciences Meeting, 2018
CountryUnited States
CityKissimmee
Period1/8/181/12/18

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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  • Cite this

    Mao, X., Rousso, A., Chen, Q., & Ju, Y. (2018). Modeling of ignition enhancement of CH4/O2 mixtures by non-equilibrium excitation of reactants using hybrid nanosecond-pulsed discharge and DC discharge. In AIAA Aerospace Sciences Meeting (210059 ed.). (AIAA Aerospace Sciences Meeting, 2018; No. 210059). American Institute of Aeronautics and Astronautics Inc, AIAA.