离子风推力效应的仿真研究

陈瑜航; 李挺

doi:10.13224/j.cnki.jasp.20220661

离子风推力效应的仿真研究

doi: 10.13224/j.cnki.jasp.20220661

陈瑜航,
李挺^*, ,

北京航空航天大学航空发动机气动热力国家级重点实验室，北京 100191

基金项目: 北京航空航天大学青年拔尖计划

详细信息

作者简介:
陈瑜航（1998-），女，硕士生，主要从事等离子体推进研究

通讯作者:
李挺（1981-），男，副教授，博士，主要从事等离子体助燃及激光诊断研究。E-mail：li1329@buaa.edu.cn

中图分类号: V11；V43
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-06
- 网络出版日期: 2024-11-13

Simulation study on thrust effect of ionic wind

CHEN Yuhang,
LI Ting^{*
, ,}

National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamic，Beihang University，Beijing 100191，China

摘要

摘要:
作为一种新型电推进技术，离子风推进技术能直接将电能转化为推力。为提升离子风推进效果，研究离子风推力产生原因以及影响因素，构建线-面、针-面离子风推进模型。通过有限元软件COMSOL Multiphysics研究离子风的内部情况，分析离子风速和体积力密度的变化，因为其与推力成正比。结果表明：线-面结构的体积力密度比针-面结构大，但风速更小；增大输入电压或减小电晕极直径能有效提高风速和体积力密度，进而增大推力；存在最优电极间距和集电极宽度使推力达最大。环境压力越小，推力越大。通过两种方法计算出线-面结构推力大小分别为0.046、0.042 N/m，与相关实验得到的结果相近，对离子风推进结构的设计有一定参考价值。
- 推力效应 /
- 电推进 /
- 离子风 /
- 电晕放电 /
- 有限元分析 /
- 推进结构设计
Abstract:
As a new type of electric propulsion technology, ionic wind propulsion technology can directly convert electrical energy into thrust. In order to enhance the ionic wind propulsion effect, the causes and factors of the thrust were studied, and the wire-plane and needle-plane ionic wind propulsion models were constructed. The internal conditions of ionic wind were studied by the finite element software COMSOL Multiphysics, and the changes of ionic wind speed and volume force density were analyzed because these were proportional to the thrust. The results showed that the volume force density of the wire-plane structure was larger than that of the needle-plane structure, but the wind speed was smaller. Increasing the input voltage or decreasing the corona electrode diameter could effectively increase the wind speed and volume force density, and then increase the thrust. There was an optimal electrode spacing and a collector width to maximize the thrust. The lower ambient pressure indicated the greater thrust. The thrusts of the wire-plane structure calculated by the two methods were 0.046 N/m and 0.042 N/m, respectively, which were close to the results of related experiments. The simulation study can provide a reference for the design of ionic wind propulsion structure.
- thrust effect /
- electric propulsion /
- ionic wind /
- corona discharge /
- finite element analysis /
- propulsion structure design

HTML

图 1 常规线-铝箔结构

Figure 1. Conventional wire -aluminum foil structure

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图 2 计算模型

Figure 2. Computational model

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图 3 速度随网格划分的变化

Figure 3. Variation of speed with meshing

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图 4 线-翼型模型^[38]

Figure 4. Wire-airfoil model^[38]

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图 5 速度对比图

Figure 5. Velocity comparison diagram

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图 6 线-面结构、针-面结构电势分布图

Figure 6. Electric potential distribution diagram of wire-plane and needle-plane structure

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图 7 线-面结构、针-面结构电晕区随电压的变化

Figure 7. Variation of corona zone of wire-plane and needle-plane structure with voltage

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图 8 线-面结构、针-面结构空间电荷密度场随电压的变化

Figure 8. Variation of space charge density field of wire-plane and needle-plane structure with voltage

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图 9 线-面结构、针-面结构速度场随电压的变化

Figure 9. Variation of velocity field of wire-plane and needle-plane structure with voltage

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图 10 线-面结构、针-面结构体积力密度分布图

Figure 10. Volume force density distribution diagram of wire-plane and needle-plane structure

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图 11 最大速度和最大体积力密度随电压变化图

Figure 11. Variation of maximum velocity and maximum volume force density with voltage

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图 12 最大速度和最大体积力密度随线电极直径变化图

Figure 12. Variation of maximum velocity and maximum volume force density with wire electrode diameter

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图 13 最大速度和最大体积力密度随电极间距变化图

Figure 13. Variation of maximum velocity and maximum volume force density with electrode spacing

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图 14 最大速度和最大体积力密度随集电极宽度变化图

Figure 14. Variation of maximum velocity and maximum volume force density with collector width

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图 15 最大速度随环境压力变化图

Figure 15. Variation of maximum velocity with environmental pressure

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图 16 单位电极长度推力对比图

Figure 16. Comparison of thrust per unit electrode length

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表 1 边界条件设置

Table 1. Boundary condition setting

位置	电场	电荷场	流场
电晕极	V = V₁	q = q₀	无滑移
集电极	V = 0	无通量	无滑移
入口	零电荷	无通量	U = U₀
出口	零电荷	无通量	p = 0
其余	零电荷	无通量	开放边界

下载: 导出CSV

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