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High temperature coronas in air and flue gas from LPG combustion: Current-voltage characteristics, ion mobilities and free electrons
Journal of Electrostatics ( IF 1.8 ) Pub Date : 2022-01-21 , DOI: 10.1016/j.elstat.2022.103676
Patrick Bürger 1 , Ulrich Riebel 1
Affiliation  

Positive and negative corona discharges were studied at atmospheric pressure in a tube-wire geometry with a tube diameter of 150 mm. Current-voltage characteristics (CVCs) were measured both in air and in flue gas produced with a liquefied petroleum gas (LPG) burner, covering temperatures from ambient up to 1073 K. Corona operation was stable over the whole temperature range with positive polarity and up to 973 K with negative polarity. Based on a detailed analysis of the original CVC measurements, new insights on the temperature-dependent mobility of gas ions, on the occurrence of free electrons and on the electronic current contribution are presented. Deviations from the Townsend theory of CVCs can be ascribed to the lifetime-dependency of ion mobility caused by the formation of cluster ions. The contribution from free electrons is found to depend on temperature and tube radius.



中文翻译:

LPG 燃烧产生的空气和烟气中的高温电晕:电流-电压特性、离子迁移率和自由电子

在大气压下,在管直径为 150 毫米的管线几何形状中研究了正负电晕放电。在空气和使用液化石油气 (LPG) 燃烧器产生的烟道气中测量电流-电压特性 (CVC),温度范围从环境温度到 1073 K。电晕操作在正极性及以上的整个温度范围内都很稳定至 973 K,具有负极性。基于对原始 CVC 测量的详细分析,提出了关于气体离子的温度依赖性迁移率、自由电子的出现和电子电流贡献的新见解。与 CVC 的 Townsend 理论的偏差可归因于由簇离子形成引起的离子迁移率的寿命依赖性。

更新日期:2022-01-21
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