空气放电特性参数间相关性研究分析

通过对同轴圆筒结构在非平衡状态下进行放电实验研究,并对实验数据进行线性拟合分析,探究常温空气放电过程中各特性参数之间的联系.实验发现,在电压满足阈值条件时,频率变化是直接影响等离子射流的主要因素,频率改变会引起射流长度相应的变化.频率的连续变化过程中,因电场驻波的影响存在突变点;而射流温度与频率变化虽受驻波影响,存在极值跳变,但射流长度与射流温度基本成对应关系;在满足阈值条件下,射流温度与电压之间呈线性增长关系;气体流速小于1 L/min时,流速变化对射流温度影响较大;当流速在1～4 L/min时,射流温度随气流速度变化较小.

Correlation Analysis of Characteristic Parameters in Air Discharge

Through the discharge experiment of coaxial cylinder structure under non-equilibrium state, and the linear fitting analysis of the experimental data, the relationship between various characteristic parameters in the process of normal temperature air discharge is explored. The results show that the variation of frequency is the main factor directly affecting the plasma jet when discharge threshold voltage is satisfied. Adjusting the frequency leads to the change of jet length. Attributed to the standing waves of the electric filed, there exists mutation point of the plasma jet length. Although the relation between jet temperature and frequency is affected by the standing waves even leading to some mutation point, however the jet temperature and the jet length exists good linear relation. Also, experimental result demonstrates a linear relation between jet temperature and discharge voltage when threshold is met. When the gas flow rate is within 1 L/min, the variation of flow rate has a great influence on the jet temperature; While the flow rate is between 1 L/min to 4 L/min, it has less impact on jet temperature.