排除法确定离子电流成因的试验

发布时间：2018-01-14 14:11

本文关键词：排除法确定离子电流成因的试验　出处：《浙江大学学报(工学版)》2016年05期 　论文类型：期刊论文

【摘要】：为了研究N/H/C元素与离子电流特征峰的关系及离子电流第3峰的成因,提出排除法.在不同点火方式和空燃比下,分别测量了碳氢燃料在合成空气(氧/氮)和氧/氩混合气中燃烧产生的离子电流,并以离子电流信号、燃烧压力信号和火焰纹影照片为基础数据分析试验.结果表明:测量电极与点火电极分开,可以避免点火信号的干扰,测量系统检测不到离子电流第1峰;C元素主要影响离子电流第2峰,H和N元素主要影响第3峰;离子电流第3峰由火焰前锋面带电粒子被燃烧室壁面吸收与NO组分热离子化共同作用产生.
[Abstract]:In order to study the relationship between N / H / C element and the characteristic peak of ion current and the cause of formation of the third peak of ion current, an exclusion method is proposed under different ignition modes and air-fuel ratio. The ion current produced by the combustion of hydrocarbon fuel in synthetic air (oxygen / nitrogen) and oxygen / argon mixture was measured, and the ion current signal was used. The results show that the interference of ignition signal can be avoided by separating the measuring electrode from the igniting electrode, and the first peak of ion current can not be detected by the measuring system. C element mainly affects the second peak of ion current H and N element mainly affects the third peak. The third peak of ion current is produced by the interaction between charged particles absorbed by combustion chamber wall and thermal ionization of no component.
【作者单位】：西安交通大学能源与动力工程学院;中国人民解放军65066部队;中国人民解放军63933部队;
【基金】：国家自然科学基金资助项目(51306143) 中央高校基本科研业务费(xjj2013001)
【分类号】：TK401
【正文快照】： 离子电流法具有快速响应、结构简单、价格低廉、耐高温等特点,使成为点燃式发动机测量和控制领域中的研究热点.Calcote等[1-2]发现混合气在燃烧过程中会产生大量的自由电子、正负离子和自由基等带电粒子.Colling等[3]通过在燃烧室内附加一电场,发现这些带电粒子在电场力作用下

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