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DC field response of one-dimensional flames using an ionized layer model

机译：一维火焰的电离层模型的直流场响应

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摘要

We develop a simplified model to better explain electric current response when direct current (DC) is applied to a flame. In particular, different current responses have been observed by changing the polarity of the DC in a sub-saturated current regime that results from the presence of ions and electrons in the flame zone. A flame zone was modeled as a thin, ionized layer located in one-dimensional DC electric fields. We derived simplified model-governing equations from species equations by implementing mobility differences dependent on the type of charged particle, particularly between ions and electrons; we performed experiments to substantiate the model. Results showed that the sub-saturated current and local field intensity were significantly influenced by the polarity of the DC because of the combined effect of unequal mobility of charged particles and the position of the ionized layer in the gap relative to two electrodes. When an energized electrode is close to the ionized layer, applying a negative DC causes a more rapid increase in current than by applying a positive DC to the same electrode. Results from our experimental measurement of current using counterflow diffusion flames agreed qualitatively well with the model predictions. A sensitivity analysis using dimensional and non-dimensional parameters also supported the importance of the mobility difference and the relative location of the ionized layer on the electric current response. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：我们开发了一个简化模型，以更好地解释将直流电（DC）应用于火焰时的电流响应。特别地，通过改变亚饱和电流状态中的DC极性，观察到了不同的电流响应，这是由火焰区域中离子和电子的存在导致的。将火焰区域建模为位于一维DC电场中的薄电离层。通过实现依赖于带电粒子类型（尤其是离子和电子之间的类型）的迁移率差异，我们从物种方程式导出了简化的模型控制方程式。我们进行了实验以证实该模型。结果表明，由于带电粒子的不均匀迁移率和电离层相对于两个电极的位置不均匀的综合作用，子饱和电流和局部场强受到DC极性的显着影响。当通电的电极靠近电离层时，施加负DC会比在相同电极上施加正DC导致电流增加更快。我们使用逆流扩散火焰对电流进行实验测量的结果在质量上与模型预测吻合。使用尺寸和非尺寸参数的敏感性分析也支持了迁移率差异和电离层在电流响应上的相对位置的重要性。 （C）2015年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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  • 来源
    《Combustion and Flame》 |2016年第1期|317-325|共9页
  • 作者

    Xiong Yuan; Park Dae Geun; Lee Bok Jik; Chung Suk Ho; Cha Min Suk;

  • 作者单位

    King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal 239556900, Saudi Arabia;

    King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal 239556900, Saudi Arabia;

    King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal 239556900, Saudi Arabia;

    King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal 239556900, Saudi Arabia;

    King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal 239556900, Saudi Arabia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ion current; Electrically assisted combustion; Direct current; Flame;

    机译：离子流;电助燃;直流电;火焰;

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