Computational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathode

The discharge characteristics of hollow cathode directly affect the performance of thruster. In order to obtain the plasma parameters of the 20 A emission current hollow cathode, COMSOL software is used to simulate the potential distribution, neutral fluid distribution and plasma parameters of the c...

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Autores principales:	Mingming Sun, Chao Liu, Zengjie Gu
Formato:	article
Lenguaje:	EN
Publicado:	Departamento de Ciência e Tecnologia Aeroespacial 2021
Materias:	cathode discharge numerical simulation discharge parameters plasma diagnosis Technology T Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doi.org/10.1590/jatm.v13.1235 https://doaj.org/article/4d224f49005a4c6c9561077b56bd1c86
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spelling	oai:doaj.org-article:4d224f49005a4c6c9561077b56bd1c862021-11-29T12:53:44ZComputational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathodehttps://doi.org/10.1590/jatm.v13.12351984-96482175-9146https://doaj.org/article/4d224f49005a4c6c9561077b56bd1c862021-11-01T00:00:00Zhttps://www.scielo.br/j/jatm/a/dgxfq3vygTZQdGpCknKzMXp/?format=pdf&lang=enhttps://doaj.org/toc/1984-9648https://doaj.org/toc/2175-9146The discharge characteristics of hollow cathode directly affect the performance of thruster. In order to obtain the plasma parameters of the 20 A emission current hollow cathode, COMSOL software is used to simulate the potential distribution, neutral fluid distribution and plasma parameters of the cathode, then the test is carried out to verify the simulations. The results show that the fluid velocity in the emitter region is about 20 ms–1 and is uniform in the radial direction. The electron density throughout the cathode discharge zone is almost uniform within the range of 1.09 × 1020 ~ 1.2 × 1020 m–3. The electron temperature increased from 2.8 to 4.9 eV throughout the cathode discharge zone. The electron collision frequency is in the order of 1023 Hz. The test results show that the electron temperature is increased from 2.4 to 5.2 eV from outlet of the emitter region to the plume region, and which presents an opposite trend to the electron density. There is a small error between the test results and the simulation results, and this error is mainly caused by the flow boundary setting. Mingming SunChao LiuZengjie GuDepartamento de Ciência e Tecnologia Aeroespacialarticlecathode dischargenumerical simulationdischarge parametersplasma diagnosisTechnologyTMotor vehicles. Aeronautics. AstronauticsTL1-4050ENJournal of Aerospace Technology and Management, Vol 13, Iss 1, Pp e4221-e4221 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cathode discharge numerical simulation discharge parameters plasma diagnosis Technology T Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	cathode discharge numerical simulation discharge parameters plasma diagnosis Technology T Motor vehicles. Aeronautics. Astronautics TL1-4050 Mingming Sun Chao Liu Zengjie Gu Computational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathode
description	The discharge characteristics of hollow cathode directly affect the performance of thruster. In order to obtain the plasma parameters of the 20 A emission current hollow cathode, COMSOL software is used to simulate the potential distribution, neutral fluid distribution and plasma parameters of the cathode, then the test is carried out to verify the simulations. The results show that the fluid velocity in the emitter region is about 20 ms–1 and is uniform in the radial direction. The electron density throughout the cathode discharge zone is almost uniform within the range of 1.09 × 1020 ~ 1.2 × 1020 m–3. The electron temperature increased from 2.8 to 4.9 eV throughout the cathode discharge zone. The electron collision frequency is in the order of 1023 Hz. The test results show that the electron temperature is increased from 2.4 to 5.2 eV from outlet of the emitter region to the plume region, and which presents an opposite trend to the electron density. There is a small error between the test results and the simulation results, and this error is mainly caused by the flow boundary setting.
format	article
author	Mingming Sun Chao Liu Zengjie Gu
author_facet	Mingming Sun Chao Liu Zengjie Gu
author_sort	Mingming Sun
title	Computational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathode
title_short	Computational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathode
title_full	Computational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathode
title_fullStr	Computational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathode
title_full_unstemmed	Computational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathode
title_sort	computational and experimental study on the discharge model of a 20 amperes emission current hollow cathode
publisher	Departamento de Ciência e Tecnologia Aeroespacial
publishDate	2021
url	https://doi.org/10.1590/jatm.v13.1235 https://doaj.org/article/4d224f49005a4c6c9561077b56bd1c86
work_keys_str_mv	AT mingmingsun computationalandexperimentalstudyonthedischargemodelofa20amperesemissioncurrenthollowcathode AT chaoliu computationalandexperimentalstudyonthedischargemodelofa20amperesemissioncurrenthollowcathode AT zengjiegu computationalandexperimentalstudyonthedischargemodelofa20amperesemissioncurrenthollowcathode
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Computational and Experimental Study on the Discharge Model of a 20 Amperes Emission Current Hollow Cathode

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