| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Numerical investigation on performance of electrohydrodynamic thruster with needle-ring electrode |
| Chun-Yan Wang(王春岩)1, Hu-Lin Huang(黄护林)1,†, Hao Li(李灏)1, Tian-Tian Chen(陈田田)1, and Xi-Jing Hu(胡锡精)2 |
1 Laboratory of Aerospace Entry Descent and Landing Technology, College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
2 Beijing Institute of Control and Electronic Technology, Beijing 100038, China |
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Abstract The electrohydrodynamic (EHD) thruster is a propulsion system characterized by its propellant-free operation. This paper employs a plasma chemical model to systematically investigate three critical parameters affecting EHD propulsion performance: oxygen concentration, secondary electron emission coefficient (SEEC), and voltage polarity. Results show that optimizing the nitrogen-to-oxygen concentration ratio from 4:1 to 5:1 under positive corona discharge enhances the thrust-to-power ratio by 41.3%. Furthermore, increasing the SEEC from 0.001 to 0.01 produces significant performance improvements, with thrust increasing by 34.5% and thrust-to-power ratio surging by 142.2%. Notably, negative corona discharge exhibits substantially reduced efficiency, as the accumulation of positive charges near the emitter electrode induces aerodynamic resistance, resulting in thrust values less than 1% of those achieved in positive discharge configurations.
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Received: 16 May 2025
Revised: 30 June 2025
Accepted manuscript online: 06 August 2025
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PACS:
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52.65.-y
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(Plasma simulation)
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52.75.Di
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(Ion and plasma propulsion)
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47.85.L-
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(Flow control)
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82.33.Xj
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(Plasma reactions (including flowing afterglow and electric discharges))
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| Fund: Project supported by the Aeronautical Science Foundation of China (Grant No. 2023Z037052002). |
Corresponding Authors:
Hu-Lin Huang
E-mail: hlhuang@nuaa.edu.cn
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Cite this article:
Chun-Yan Wang(王春岩), Hu-Lin Huang(黄护林), Hao Li(李灏), Tian-Tian Chen(陈田田), and Xi-Jing Hu(胡锡精) Numerical investigation on performance of electrohydrodynamic thruster with needle-ring electrode 2026 Chin. Phys. B 35 035205
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