高气压下三维旋转滑动弧放电光谱特性分析  

Study of the Spectral Characteristics of 3D Rotating Gliding Arc Under High Pressure

作　　者：张磊[1] 张登成 于锦禄 赵兵兵 徐哲霖 程伟达 ZHANG Lei;ZHANG Deng-cheng;YU Jin-lu;ZHAO Bing-bing;XU Zhe-lin;CHENG Wei-da(School of Aeronautical Engineering,Air Force Engineering University,Xi’an 710038,China)

机构地区：[1]中国人民解放军空军工程大学航空工程学院,陕西西安710038

出　　处：《光谱学与光谱分析》2024年第6期1571-1577,共7页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(52276142,51776223)资助。

摘　　要：为探究气体压力对滑动弧放电稳定性的影响规律,在高气压放电实验平台上,开展了滑动弧放电光谱特性研究。利用发射光谱法对滑动弧放电过程中的激发态物质进行诊断,并对不同气体压力条件下滑动弧放电的电子密度、振动温度、转动温度进行了计算。在滑动弧放电发射光谱中观测到氮气第二正带系N_(2)(C^(3)Π_(u)→B^(3)Π_(g))和氮气第一负带系N^(+)_(2)(B^(2)Σ^(+)_(u)→X^(2)Σ^(+)_(g))的发射谱线,随着气体压力升高,氮气第二正带系谱线发射强度增强,氮气第一负带系的发射强度变化幅度较小。当气体压力超过0.26 MPa之后,在滑动弧放电发射光谱中发现了氮气Gaydon s Green带系507.4 nm的发射谱线,其发射强度为3508.49 arb,随气体压力升高其谱线发射强度无明显变化。利用Stark展宽法对滑动弧放电过程中的电子密度进行了计算,得到电子密度在1023量级,并且随着气体压力的增加,滑动弧放电的电子密度呈线性增加。针对氮气分子第二正带系的5条谱线,采用玻尔兹曼图解法对滑动弧放电的振动温度进行计算,振动温度随气体压力的变化并非单调变化,在0.3 MPa之前振动温度变化幅度较小,气体压力超过0.3 MPa之后振动温度迅速增加。对氮气分子第一负带系390~391.6 nm处的发射谱线进行拟合计算滑动弧放电的转动温度,结果表明在0.24 MPa之前转动温度随气体压力升高变化幅度较大,气体压力超过0.24 MPa之后转动温度增长幅度变小。To investigate the influence of gas pressure on the process of gliding arc discharge,the spectral characteristics of gliding arc discharge were studied on a high-pressure discharge experimental platform.The excited state substances in gliding arc discharge are diagnosed by emission spectroscopy,and the electron density,vibration temperature and rotation temperature of gliding arc discharge under different gas pressures are calculated.The emission lines of the second positive system of nitrogen N_(2)(C^(3)Π_(u)→B^(3)Π_(g))and the first negative system of nitrogen N^(+)_(2)(B^(2)Σ^(+)_(u)→X^(2)Σ^(+)_(g))are observed in the emission spectra of the gliding arc discharge.With the increase of gas pressure,the emission intensity of the emission line of the second positive system of nitrogen increases,whereas the emission intensity of the first negative system of nitrogen changes slightly.The Stark broadening method calculates the electron density in gliding arc discharge.It is found that the electron density is 1023 orders of magnitude,and the electron density increases linearly with the increase of gas pressure.The vibration temperature of sliding arc discharge is calculated using the Boltzmann diagram method for the five spectral lines of the second positive system of nitrogen molecules.The change of vibration temperature with gas pressure is not monotone.The range of vibration temperature changes is small before 0.3 MPa and increases rapidly after the gas pressure exceeds 0.3 MPa.The rotational temperature of the discharge from the gliding arc was calculated by fitting the emission lines at 390~391.6 nm in the first negative nitrogen molecules system.The rotational temperature changed significantly with the increase of gas pressure before 0.24 MPa,and the addition of rotational temperature decreased when the gas pressure exceeded 0.24 MPa.

关 键 词：滑动弧等离子体 高气压放电 电子密度 振动温度 转动温度 

分 类 号：O433.4[机械工程—光学工程]