Optical and electrical diagnostics of a spark-plug discharge in air
Optical and electrical diagnostics of a spark-plug discharge in air
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DOI：
10.1088/0022-3727/45/25/255201
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
C. Oliveira;J. L. Reis;J. A. Souza-Corrêa;A. Dal Pino;J. Amorim
中科院分区：
文献类型：
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作者：
C. Oliveira;J. L. Reis;J. A. Souza-Corrêa;A. Dal Pino;J. Amorim
用光学和电学诊断方法研究了在辉光相区工作的商用火花塞的火花放电。测量了电压和电流，以表征放电过程。通过实验光谱和模拟光谱的比较，利用氮气第二正离子体系的振动光谱估算了气体温度随时间和占空比的变化。结果表明，脉冲电流结束后，1600K的⩽、Tg、⩽为2800K，还原电场在1~1000TD之间变化。用离子Ar和中性原子的一条谱线和另一条谱线之间的谱线强度法测得电子温度在17000~20000K之间，由H-α谱线的展宽确定电子密度为4.0×10 14 cm−3⩽Ne⩽1.7×10 15 cm−3。
Optical and electrical diagnostics were used to investigate a spark discharge using a commercial spark-plug operating in the glow phase regime. Voltage and current were measured in order to characterize the discharge. The gas temperature was estimated as a function of time and duty cycle using ro-vibrational spectra of the second positive system of nitrogen by comparison between experimental and simulated spectra. It was found that 1600 K ⩽ Tg ⩽ 2800 K. The reduced electric field varied between 1 and 1000 Td after the end of the current pulse. Using the line intensity method between one line from the ionic argon and the other from the neutral atom, the electronic temperature was measured and found to be between 17 000 and 20 000 K. The electron density was determined from the broadening of Hα line and was found to be 4.0 × 1014 cm−3 ⩽ ne ⩽ 1.7 × 1015 cm−3.