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为了研究圆柱形阳极层霍尔推力器运行过程中的轮辐效应(rotating spoke)旋转频率在相关工作参数影响下的变化规律,找出抑制轮辐效应的方法,采用了将环形阳极分成独立两段的设计方案,通过观测两个独立阳极段之间的信号随放电电压、工质输送速率等参数的变化来定性定量开展试验研究。试验观测结果表明,该推力器在运行过程中,随着放电电压和气压的增加,轮辐效应旋转频率相应地获得提高;在近阳极区域的轮辐效应是普遍存在的,即使是在高电压的条件下;轮辐效应旋转频率主要在10~45kHz;轴向电流振荡在独立阳极段总电流中约占50%。减小工质流量,降低放电电压有利于抑制轮辐效应。
In order to study the variation rule of rotating spoke rotating frequency under the influence of relevant operating parameters during the operation of a cylindrical anode layer Hall thruster, a method of restraining the spoke effect was proposed. The ring anode was divided into two independent segments The design scheme is qualitatively and quantitatively studied by observing the change of the signal between two independent anode segments with the discharge voltage and the working fluid transport rate. Experimental results show that during the operation of the thruster, with the increase of discharge voltage and pressure, the rotation frequency of spoke effect is correspondingly increased. The spoke effect in the near-anodic region is ubiquitous. Even under the condition of high voltage ; The rotation frequency of the spoke effect is mainly in the range of 10-45 kHz; the axial current oscillation accounts for about 50% of the total current in the independent anode segment. Reduce the working fluid flow, reduce the discharge voltage is conducive to inhibit the spoke effect.