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非平衡等离子点火 中放电过程的数值模拟 = Numerical simulation of discharge process in nonequilibrium plasma assisted ignition

Zhang, ZH; Luo, KH; Chen, Y; (2016) 非平衡等离子点火 中放电过程的数值模拟 = Numerical simulation of discharge process in nonequilibrium plasma assisted ignition. 工 程 热 物 理 学 报 = Journal of Engineering Thermophysics , 37 (11) pp. 2478-2483. Green open access

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Abstract

摘 要 非平衡等离 子点火 是一 种利 用 非平衡等离 子体的 化学 效应 和热 效应来 引 燃混合物 的 新 型点 火方式 。 具有拓 宽稀 燃极 限 、 降低点 火延迟 等优点 , 近年来引 起 研究人 员的 关注. 等离子 体 是一 个带 电粒 子的复 杂 系统, 粒子间 存 在电离 、 激 发、 离解 、 电荷转移等 复杂 的 相 互 作 用 。 本 文分 析 了 非平 衡等离子体 中 电 子 影 响 下的 碰撞 , 以 氮氧 混合 物为 例模拟了 约化 电 场 强 度 高于 1 〇 〇 Td 时电 子对分子 的激发和 电 离作用 。 采 用高 约化 电 场 强度 下的 简化 机理 , 对氮 气 氧气中 的 介 质阻挡放 电过程进行了模 拟 , 分析 了 激发态粒 子的 产 生和 〇 自 由 的生 成过 程 。/ Nonequilibrium plasma assisted ignition is a way to ignite combustible mixtures due to the chemical and thermal effect of plasma. The nonequilibrium plasma assisted ignition can extend the lean burn limits and reduce the ignition delay time. Recently, the potential use of nonequilibrium plasma for increasing lean burn flame stability and reducing emissions has garnered increasing interest of researchers. Plasma is a complicated system of neutral and charged particles with various interactions such as ionization, excitation, dissociation and charge transfer. In this thesis, an insight in to the electron-impact collisions in nonequilibrium plasmas is provided, a nanosecond discharge process in a mixture of nitrogen and oxygen was simulated with a simplified kinetics for a high reduced electric field ( > 100 Td). The formation of O radical and other excited states were analyzed.

Type: Article
Title: 非平衡等离子点火 中放电过程的数值模拟 = Numerical simulation of discharge process in nonequilibrium plasma assisted ignition
Open access status: An open access version is available from UCL Discovery
Publisher version: http://jetp.iet.cn/CN/Y2016/V37/I11/2478
Language: Chinese
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: 非平衡等离子体 等离子点火 等离子助燃 介质阻挡放电 / nonequilibrium plasma, plasma assisted ignition, plasma assisted combustion
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10024545
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