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

doi:10.2514/6.2018-0928

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 proceeding › Conference contribution

4 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 (a¹ ∆_g) 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 (a¹ ∆_g) are generated efficiently by non-equilibrium excitation in the hybrid discharge. It is found that O₂ (a¹ ∆_g) 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 language	English (US)
Title of host publication	AIAA Aerospace Sciences Meeting
Publisher	American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)	9781624105241
DOIs	https://doi.org/10.2514/6.2018-0928
State	Published - 2018
Event	AIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States Duration: Jan 8 2018 → Jan 12 2018

Publication series

Name	AIAA Aerospace Sciences Meeting, 2018

Other

Other	AIAA Aerospace Sciences Meeting, 2018
Country/Territory	United States
City	Kissimmee
Period	1/8/18 → 1/12/18

All Science Journal Classification (ASJC) codes

Aerospace Engineering

Access to Document

10.2514/6.2018-0928

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 (AIAA Aerospace Sciences Meeting, 2018). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-0928

@inproceedings{e736c103c44b45b8b629adb0b3d883e4,

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

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 (a1 ∆g) 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 (a1 ∆g) are generated efficiently by non-equilibrium excitation in the hybrid discharge. It is found that O2 (a1 ∆g) 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.",

author = "Xingqian Mao and Aric Rousso and Qi Chen and Yiguang Ju",

note = "Publisher Copyright: {\textcopyright} 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.; AIAA Aerospace Sciences Meeting, 2018 ; Conference date: 08-01-2018 Through 12-01-2018",

year = "2018",

doi = "10.2514/6.2018-0928",

language = "English (US)",

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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. AIAA Aerospace Sciences Meeting, 2018, American Institute of Aeronautics and Astronautics Inc, AIAA, AIAA Aerospace Sciences Meeting, 2018, Kissimmee, United States, 1/8/18. https://doi.org/10.2514/6.2018-0928

Modeling of ignition enhancement of CH₄/O₂ mixtures by non-equilibrium excitation of reactants using hybrid nanosecond-pulsed discharge and DC discharge. / Mao, Xingqian; Rousso, Aric; Chen, Qi et al.
AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics Inc, AIAA, 2018. (AIAA Aerospace Sciences Meeting, 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Modeling of ignition enhancement of CH4/O2 mixtures by non-equilibrium excitation of reactants using hybrid nanosecond-pulsed discharge and DC discharge

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AU - Rousso, Aric

AU - Chen, Qi

AU - Ju, Yiguang

PY - 2018

Y1 - 2018

N2 - 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 (a1 ∆g) 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 (a1 ∆g) are generated efficiently by non-equilibrium excitation in the hybrid discharge. It is found that O2 (a1 ∆g) 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.

AB - 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 (a1 ∆g) 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 (a1 ∆g) are generated efficiently by non-equilibrium excitation in the hybrid discharge. It is found that O2 (a1 ∆g) 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.

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