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空气等离子体射流点火器的光谱特性实验研究

DOI: 10.13336/j.1003-6520.hve.2015.09.008, PP. 2874-2879

Keywords: 等离子体点火器,空气,发射光谱,活性粒子,电子温度,转动温度,点火器射流温度

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Abstract:

为研究空气等离子体射流点火器的光谱特性,以空气作为点火器的工作介质进行了等离子体点火器射流实验。测量了以空气为工作介质的等离子体点火器的发射光谱,计算了等离子体点火射流的电子温度、转动温度和点火射流温度,研究了工作介质质量流量、点火驱动电源输出电流对电子温度和点火射流温度特性的影响。实验结果表明空气等离子体射流点火器喷出的等离子体射流发射光谱中主要包括的β;带谱线和的γ;带谱线、氮气第二正带系的振动态谱线、氮气离子第一负系的振动态谱线,以及氧原子、氮原子谱线;通过对发射光谱中氮气离子第一负系谱带在390~391.6nm范围进行拟合,典型状态下,等离子体点火器射流的转动温度为3500K;电子温度和点火器的射流温度随射流远离阳极喷口先升高后降低,随工作介质质量流量的增大而逐渐降低,随点火驱动电源输出电流的增大而升高。

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