PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Experimental and numerical analyses of electrohydrodynamic force according to air pressure |
Rong-Hui Quan(全荣辉)†, Bo Wang(王博), and Yun-Jia Yao(姚韵佳) |
Nanjing University of Aeronautics and Astronautics, College of Astronautics College of Astronautics, Nanjing 211106, China |
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Abstract Electrohydrodynamic (EHD) force produced by corona discharge is considered as a new thrust for solar-powered aircraft and stratosphere balloons in near space. However, its performance at low air pressures remains to be clarified. An experiment of measuring the EHD force at 0.02 atm-1.0 atm (1 atm=1.01325×105 Pa) is carried out with the wire-to-cylinder geometric structure. The ion distribution is analyzed by using the drift-diffusion model with two-dimensional numerical simulation. The experimental result shows that the EHD force is not linearly related to the corona discharge current at low air pressures. Numerical simulation finds that the proportion of ions in the counter-direction electric field increases from approximately 0.36% to 30% when the pressure drops from 1.0 atm to 0.2 atm. As a result, the EHD force with a constant power supply drops faster than the previous theoretical prediction in the ground experiment, suggesting that the consideration of counter-direction EHD force is necessary to improve the ionic wind propulsion efficiency in near-space applications.
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Received: 05 October 2022
Revised: 29 November 2022
Accepted manuscript online: 16 December 2022
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PACS:
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52.80.-s
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(Electric discharges)
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52.80.Hc
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(Glow; corona)
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51.10.+y
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(Kinetic and transport theory of gases)
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52.40.Kh
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(Plasma sheaths)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51877111). |
Corresponding Authors:
Rong-Hui Quan
E-mail: quanrh@nuaa.edu.cn
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Cite this article:
Rong-Hui Quan(全荣辉), Bo Wang(王博), and Yun-Jia Yao(姚韵佳) Experimental and numerical analyses of electrohydrodynamic force according to air pressure 2023 Chin. Phys. B 32 065201
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