针环式电极大气压下氩气等离子体射流长度影响因素研究

为掌握反应器结构参数和放电参数对大气压非平衡等离子体射流(N-APPJ)的射流长度的定量影响, 设计了多结构的针-环式电极氩气等离子体射流装置, 分别研究了放电电压、电极间隙、高压电极放电末端与接地电极的距离及氩气体积流量对射流长度的影响, 并采用发生光谱法对该反应器产生的等离子体电子激发温度进行了计算。结果表明: 等离子体射流的最大长度可达80 mm; 高压电极放电末端与接地电极之间的距离越大, 射流长度越长但不是线性增长; 射流长度随电极间隙的增加呈现先增大后减小的趋势且在电极间隙为4.5 mm时该射流达到最大长度; 随着氩气体积流量的增加, 等离子体射流长度也呈现出先增大后减小的趋势且减小的幅度较低; 电子激发温度在高压电极和接地电极处较高, 两电极之间部分次之, 在石英管出口处会有比较明显的下降。

Abstract

A multi-structure needle-ring electrode argon plasma jet device was designed to grasp the quantitative influence of the reactor structure parameters and discharge parameters on the jet length of the atmospheric pressure non-equilibrium plasma jet (N-APPJ). The effects of discharge voltage, electrode gap, the distance between the discharge end of the high-voltage electrode and the ground electrode, and the volume flow of argon on the jet length were calculated. The results show that the maximum length of the plasma jet can reach 80mm; the longer the distance between the discharge end of the high voltage electrode and the ground electrode, the longer the jet length but not linearly; the jet length first increases and then decreases with the increase of the electrode gap, and the jet reaches the maximum length when the electrode gap is 4.5 mm; with the increase of the volume flow of argon, the length of the plasma jet also shows a trend of first increasing and then decreasing, and the decreasing amplitude is low; the electron excitation temperature It is higher at the high-voltage electrode and the ground electrode, and the part between the two electrodes is second, and there will be a more obvious drop at the outlet of the quartz tube.

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田富超, 陈雷, 裴欢, 白洁琪, 曾文. 针环式电极大气压下氩气等离子体射流长度影响因素研究[J]. 光谱学与光谱分析, 2023, 43(12): 3682. TIAN Fu-chao, CHEN Lei, PEI Huan, BAI Jie-qi, ZENG Wen. Study of Factors Influencing the Length of Argon Plasma Jets at Atmospheric Pressure With Needle Ring Electrodes[J]. Spectroscopy and Spectral Analysis, 2023, 43(12): 3682.

针环式电极大气压下氩气等离子体射流长度影响因素研究

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