Feasibility Study on Numerical Life Qualification of Ion Thruster's Ion Optics Using the JIEDI Tool
Feasibility Study on Numerical Life Qualification of Ion Thruster's Ion Optics Using the JIEDI Tool
复制标题
使用 JIEDI 工具进行离子推进器离子光学器件数值寿命验证的可行性研究
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
I. Funaki
中科院分区：
文献类型：
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作者：
Hiroki Watanabe;M. Nakano;Y. Kajimura;I. Funaki
JIEDI （JAXA的离子引擎开发计划）工具已经开发出来，用于评估离子推进器的离子加速网格侵蚀。本文对JIEDI工具进行了验证，并对JIEDI工具输入参数进行了灵敏度分析。通过与JIEDI工具仿真结果和耐久性试验结果的比较，表明JIEDI工具能够成功再现μ10原型模型的全寿命试验。通过灵敏度分析，粘着因子对加速器栅格侵蚀和电子倒流时间的估计最为敏感。在没有再沉积的最坏情况下，通过栅格孔的中性质量流速率的不确定性对估计加速栅格侵蚀具有重要意义。由推进剂利用效率变化6%引起的中性质量流量变化30%，对应于加速器栅格质量损失和轴上最小电位增加速率变化约20%。与加速器栅格侵蚀相比，放电电压和栅格间隙的不确定性对估计减速器栅格侵蚀非常重要，因为它们会影响主流离子的运动轨迹。放电电压变化40%对应减速器栅极质量损失变化约90%。
The JIEDI (JAXA’s Ion Engine Development Initiative) tool has been developed to assess the ion acceleration grid erosion of an ion thruster. Validation of the JIEDI tool and sensitivity analysis of input parameters in the JIEDI tool were conducted in this paper. Comparison with the simulation results by the JIEDI tool and the endurance test results showed that the full lifetime test of μ10 prototype model was successfully reproduced by the JIEDI tool. Through the sensitivity analysis, sticking factor is most sensitive to estimate the accelerator grid erosion and electron backstreaming time. In the worst case of grid erosion, which is without re-deposition, the uncertainty in neutral mass flow rate through grid holes is important to estimate the accelerator grid erosion. 30% change in the neutral mass flow rate, which is caused by 6% change in propellant utilization efficiency, corresponds to about 20% change in the accelerator grid mass loss and in the increasing rate of minimum potential on the axis. In contrast to the accelerator grid erosion, the uncertainties in discharge voltage and grid gap, which affect the trajectory of mainstream ions, are important to estimate decelerator grid erosion. 40% change in discharge voltage corresponds to about 90% change in the decelerator grid mass loss.
影响因子：
1.9
作者：
I. Funaki;H. Kuninaka;K. Toki
通讯作者：
I. Funaki;H. Kuninaka;K. Toki