中文摘要：

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2 2NO（BΠ→XΠ）的β带谱线和2 2NO（A XΠ）＋Σ→的γ带谱线、氮气第二正带系3 32 uN（CΠBΠ）g→的振动态谱线、氮气离子第一负系2 22N（B X）u g＋＋＋Σ→Σ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2 22N（B X）u g＋＋＋Σ→Σ谱带在390~391.6 nm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3 500 K;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。

英文摘要：

To study the spectral characteristics of air plasma jet igniter, the plasma jet igniter experiment was conducted on plasma igniter with air feedstock. The emission spectrum of plasma ignition with air feedstock was measured, the elec- tron temperature and the rotational temperature were calculated, and the influences of the working feedstock flow rate and the ignition driving power output current on temperature characteristic were analyzed. Experimental results show that the spectrum of plasma jet ejected from air plasma jet ignition mainly includes 13 band of NO （B2∏→X2∏）,γ band of NO （A2E＋ → X2H）, the vibrational spectral lines of the second positive system N2 （C3∏u→ B3∏g） and the first negative system N2＋ （B2E＋ →X2g＋）, as well as atomic lines ofO, N. By fitting the N2＋ （B2∑u＋→X2∑g＋） at （390-391.6 rim）, calcula- tion results show that the rotational temperature is 3 500 K. Electronic temperature first increases and then decreases as the distance between plasma ignition and anode nozzle jet grows longer, and gradually decreases as the flow rate of the working feedstock increases, and increases as the output current of ignition driving power increases.