The Influence of the Magnetic Field Line Curvature on Wall Erosion near the Hall Thruster Exit Plane
One of the main factors that limit the lifetime of the Hall effect Thrusters (HETs) is the erosion of the acceleration channel caused by the flux of energetic ions. The magnetic field that is curved and convex towards the anode has been widely used in HETs because of its role in reducing the diverge...
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MDPI AG
2023-03-01
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| Online Access: | https://www.mdpi.com/2076-3417/13/6/3547 |
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| author | Lulu Quan Yong Cao Bin Tian Keyu Gong |
| author_facet | Lulu Quan Yong Cao Bin Tian Keyu Gong |
| author_sort | Lulu Quan |
| collection | DOAJ |
| description | One of the main factors that limit the lifetime of the Hall effect Thrusters (HETs) is the erosion of the acceleration channel caused by the flux of energetic ions. The magnetic field that is curved and convex towards the anode has been widely used in HETs because of its role in reducing the divergence angle of the ion beam and the channel wall erosion. However, the mechanism of the influence of the magnetic field line curvature on the wall erosion is not clear. Therefore, in this paper, a 2D3V numerical model based on the immersed-finite-element and particle-in-cell (IFE-PIC) method is established to simulate the radial-azimuthal plane near the exit of the Hall thruster. The effect of the tilt angle of the magnetic field line on the wall sputtering erosion rate is analyzed. The results show that compared to the case with the electric field <b><i>E</i></b> perpendicular to the magnetic field <b><i>B</i></b>, the energy of the ions hitting the channel wall is smaller and the wall erosion is weaker when the magnetic field lines are convex to the anode. As the tilt angle of the magnetic field lines increases from 0° to 60°, the erosion rate is reduced by 90%. Conversely, when the magnetic field lines are convex to the exit plane of the channel, the wall erosion is much more serious compared to the case with the orthogonal electric field <b><i>E</i></b> and the magnetic field <b><i>B</i></b>. As the tilt angle of the magnetic field line changes from 0° to 60°, the erosion rate is enhanced by 171%. The results in this paper are instructive for the design and optimization of the magnetic field of the HETs. |
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| language | English |
| last_indexed | 2024-03-11T07:00:03Z |
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| spelling | doaj.art-eb2314bd8f3b47a1ae5bc24c93a354172023-11-17T09:23:18ZengMDPI AGApplied Sciences2076-34172023-03-01136354710.3390/app13063547The Influence of the Magnetic Field Line Curvature on Wall Erosion near the Hall Thruster Exit PlaneLulu Quan0Yong Cao1Bin Tian2Keyu Gong3School of Mechanical Engineering and Automation, Harbin Institute of Technology (Shenzhen), Shenzhen 518071, ChinaSchool of Mechanical Engineering and Automation, Harbin Institute of Technology (Shenzhen), Shenzhen 518071, ChinaSchool of Mechanical Engineering and Automation, Harbin Institute of Technology (Shenzhen), Shenzhen 518071, ChinaSchool of Mechanical Engineering and Automation, Harbin Institute of Technology (Shenzhen), Shenzhen 518071, ChinaOne of the main factors that limit the lifetime of the Hall effect Thrusters (HETs) is the erosion of the acceleration channel caused by the flux of energetic ions. The magnetic field that is curved and convex towards the anode has been widely used in HETs because of its role in reducing the divergence angle of the ion beam and the channel wall erosion. However, the mechanism of the influence of the magnetic field line curvature on the wall erosion is not clear. Therefore, in this paper, a 2D3V numerical model based on the immersed-finite-element and particle-in-cell (IFE-PIC) method is established to simulate the radial-azimuthal plane near the exit of the Hall thruster. The effect of the tilt angle of the magnetic field line on the wall sputtering erosion rate is analyzed. The results show that compared to the case with the electric field <b><i>E</i></b> perpendicular to the magnetic field <b><i>B</i></b>, the energy of the ions hitting the channel wall is smaller and the wall erosion is weaker when the magnetic field lines are convex to the anode. As the tilt angle of the magnetic field lines increases from 0° to 60°, the erosion rate is reduced by 90%. Conversely, when the magnetic field lines are convex to the exit plane of the channel, the wall erosion is much more serious compared to the case with the orthogonal electric field <b><i>E</i></b> and the magnetic field <b><i>B</i></b>. As the tilt angle of the magnetic field line changes from 0° to 60°, the erosion rate is enhanced by 171%. The results in this paper are instructive for the design and optimization of the magnetic field of the HETs.https://www.mdpi.com/2076-3417/13/6/3547hall effect thrusterimmersed-finite-elementparticle-in-cell methodmagnetic field line curvaturetilt anglewall erosion |
| spellingShingle | Lulu Quan Yong Cao Bin Tian Keyu Gong The Influence of the Magnetic Field Line Curvature on Wall Erosion near the Hall Thruster Exit Plane Applied Sciences hall effect thruster immersed-finite-element particle-in-cell method magnetic field line curvature tilt angle wall erosion |
| title | The Influence of the Magnetic Field Line Curvature on Wall Erosion near the Hall Thruster Exit Plane |
| title_full | The Influence of the Magnetic Field Line Curvature on Wall Erosion near the Hall Thruster Exit Plane |
| title_fullStr | The Influence of the Magnetic Field Line Curvature on Wall Erosion near the Hall Thruster Exit Plane |
| title_full_unstemmed | The Influence of the Magnetic Field Line Curvature on Wall Erosion near the Hall Thruster Exit Plane |
| title_short | The Influence of the Magnetic Field Line Curvature on Wall Erosion near the Hall Thruster Exit Plane |
| title_sort | influence of the magnetic field line curvature on wall erosion near the hall thruster exit plane |
| topic | hall effect thruster immersed-finite-element particle-in-cell method magnetic field line curvature tilt angle wall erosion |
| url | https://www.mdpi.com/2076-3417/13/6/3547 |
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