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电晕放电对飞行器的运行安全造成严重威胁。为了解高空低气压环境下电晕放电特性,建立了由真空泵、真空计、密闭气罐、高压静电源、动态电位测试仪等组成的高空低气压电晕放电模拟试验系统。采用针–板电极结构模型进行了低气压环境下电晕放电模拟试验,并结合气体放电理论,从微观粒子运动角度对试验结果进行理论分析。结果表明:在5~30 k Pa范围内,随着气压的降低,起晕电压近似呈线性降低,Trichel脉冲幅值、上升沿时间以及重复频率逐渐增大,但脉冲持续时间基本不变,约为600 ns。该研究结论可为研究飞行器的电晕放电特性提供参考。
Corona discharge poses a serious threat to the operational safety of the aircraft. In order to understand the characteristics of corona discharge at high altitude and low pressure, a simulation test system of high altitude and low pressure corona discharge composed of vacuum pump, vacuum gauge, closed gas tank, high voltage static power supply and dynamic potential tester was established. The needle-plate electrode model was used to simulate the corona discharge under low pressure. Combining with the theory of gas discharge, the experimental results were analyzed theoretically from the perspective of microscopic particle motion. The results show that in the range of 5 ~ 30 k Pa, the voltage of corona onset decreases approximately linearly with the decrease of air pressure. The amplitude, rising time and repetition frequency of Trichel pulse increase gradually, but the pulse duration remains unchanged. Is 600 ns. The conclusions of this study can provide reference for the research on the corona discharge characteristics of aircraft.