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为探索放电室能量损耗机制,开展了离子推力器放电室能量平衡研究。基于放电室零维模型,得到放电室电流平衡关系,结合放电室电势分布,分析放电室能量损耗并建立了能量平衡模型。应用模型计算LIPS200离子推力器放电室各项能量损耗,并进一步得到各能量损耗所占比例,所得结果与国外离子推力器NEXT具有较好的一致性;采用多工况试验参数(阳极电流4.0~4.4A,阳极电压34~38V)对放电室总能量损耗进行动态验证,结果表明:计算结果与试验结果误差小于3%。
In order to explore the energy loss mechanism of the discharge chamber, the energy balance of the ion thruster discharge chamber was studied. Based on the zero-dimensional model of the discharge cell, the current balance of the discharge cell was obtained. Based on the potential distribution of the discharge cell, the energy loss of the discharge cell was analyzed and an energy balance model was established. The energy loss of the discharge chamber of LIPS200 ion thruster was calculated using the model and the proportion of each energy loss was further obtained. The obtained results were in good agreement with that of the foreign ion thruster NEXT. The experimental data (anode current 4.0 ~ 4.4A, anodic voltage 34 ~ 38V) to verify the total energy loss of the discharge chamber. The results show that the error between the calculated and experimental results is less than 3%.