RT Journal Article
T1 Three-dimensional neutralizer effects on a Hall-effect thruster near plume
A1 Cichocki, Filippo
A1 Domínguez Vázquez, Adrián
A1 Merino Martínez, Mario
A1 Fajardo Peña, Pablo
A1 Ahedo Galilea, Eduardo Antonio
AB The near plume of an SPT100-like Hall thruster is simulated with a hybrid particle-in-cell/fluid code to assess the three-dimensional effects of the neutralizer for two different asymmetric positions. The electron fluid model accounts for the effects of both magnetization and collisions, and closes the momentum equation with a simple polytropic closure for the electron temperature. The observed asymmetries are small in the majority of the plasma plume properties and in the achieved magnetic thrust and torque, which also show consistent trends with the available experimental characterizations. The only exception is represented by the 3D electric and electron current densities, which show persistent asymmetries that tend to diminish as the neutralizer is placed both farther downstream and radially outward, outside of the magnetic separatrix. These findings permit to justify the use of axisymmetric codes for Hall-effect thruster performance estimation. The results on the neutralizer asymmetry effects are found robust to different polytropic coefficients (i.e. electron temperature gradients). Finally, the comparison of the adopted polytropic closure model against an advanced one including the energy balance equation shows relevant differences in the electron temperature but still a good agreement in the electron current density map.
PB Elsevier
SN 0094-5765
YR 2021
FD 2021-10
LK https://hdl.handle.net/10016/33549
UL https://hdl.handle.net/10016/33549
LA eng
NO This work has been supported by the ESPEOS project, funded by the Agencia Estatal de Investigación (Spanish National Research Agency), under Grant number PID2019-108034RB-I00/AEI/10.13039/501100011033. Additional support has been received from the ASPIRE project, funded by the European Union's Horizon 2020 Research and Innovation Program , under Grant Agreement number 101004366.
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RD 27 jul. 2024