一种针-板结构模拟飞机放电刷负电晕放电辐射特性的等效方法

为了解决地面放电实验对空中飞机放电刷负电晕放电辐射噪声模拟的问题,分别对飞行器放电刷及针-板放电结构负电晕放电起始阶段进行建模。经过数值计算得到两种模型在一定的放电环境、激励电压及放电刷几何结构条件下,放电的阈值电压;并且探讨了两种模型在不同条件下阴极二次光电子随"电子崩"发展过程。通过比较不同条件下二次光电子的发展趋势,确定不同放电模型电磁辐射的可比性。提出的等效方法为今后有关飞行器放电刷负电晕放电辐射干扰的地面模拟提供理论依据。

A Equivalent Method for simulated aircraft discharge brush negative corona discharge by using needle plate Electrode

In order to simulate the radiation signal of negative corona discharge on aircraft discharge brush in ground test, this article models the initial stages of negative corona discharge of aircraft discharge brush and needle-plate configuration respectively. Numerical calculation is carried out to obtain the discharge threshold voltage of two models in certain condition of discharge environment, excitation voltage and discharge brush geometry. Moreover, the change process of cathode secondary photoelectron of two models along with electron avalanche is discussed. The comparability of electromagnetic radiation among different discharge models is improved by comparing the variation trend of cathode secondary photoelectron under different conditions. The equivalent method presented in the paper provides theoretical basis for further research on ground simulation of negative corona radiated interference of aircraft discharge brush.