Study of the breathing mode development in Hall thrusters using hybrid simulations - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Applied Physics Année : 2024

Study of the breathing mode development in Hall thrusters using hybrid simulations

Résumé

We use a 2.5D hybrid simulation to study the breathing mode (BM) dynamics in Hall thrusters (HTs). This involves a 1D Euler fluid simulation for neutral dynamics in the axial direction, coupled with a 2D axial–azimuthal Particle-in-Cell (PIC) simulation for charged species. The simulation also includes an out-of-plane virtual dimension for wall losses. This setup allows us to replicate the BM’s macroscopic features observed in experiments. A comprehensive analysis of plasma parameters in BM’s phases divides it into two growth and two decay sub-phases. Examining 1D axial profiles of electron temperature, gas and plasma densities, and particle creation rate shows that an increase in electron temperature alone cannot sustain ionization. Ionization seems to be influenced by the spatial correlation between electron and gas densities and the ionization rate coefficient. Investigating ion back-flow reveals its impact on modulating neutral flux entering the ionization region. The hybrid simulation’s outcomes let us assess the usual 0D predator–prey model’s validity and identify its limitations. The ionization and ion convection term approximations hold, but the gas convective term approximation does not. Introducing an alternative gas convective term approximation involving constant density ejection from the ionization region constructs an unstable BM model consistent with simulation results. In addition, this paper explores how varying the imposed voltage and mass flow rate impacts the BM. The BM frequency increases with imposed voltage, aligning with theoretical predictions. The mass flow rate variation has a limited effect on BM frequency, following the theoretical model’s trend.
Fichier principal
Vignette du fichier
JAP23-AR-05317.pdf (7.48 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04476595 , version 1 (25-02-2024)

Identifiants

Citer

Federico Petronio, Alejandro Alvarez Laguna, Anne Bourdon, Pascal Chabert. Study of the breathing mode development in Hall thrusters using hybrid simulations. Journal of Applied Physics, 2024, 135 (7), ⟨10.1063/5.0188859⟩. ⟨hal-04476595⟩
14 Consultations
5 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More