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Title: Numerical studies of wall–plasma interactions and ionization phenomena in an ablative pulsed plasma thruster

Abstract

Wall–plasma interactions excited by ablation controlled arcs are very critical physical processes in pulsed plasma thrusters (PPTs). Their effects on the ionization processes of ablated vapor into discharge plasma directly determine PPT performances. To reveal the physics governing the ionization phenomena in PPT discharge, a modified model taking into account the pyrolysis effect of heated polytetrafluoroethylene propellant on the wall–plasma interactions was developed. The feasibility of the modified model was analyzed by creating a one-dimensional simulation of a rectangular ablative PPT. The wall–plasma interaction results based on this modified model were found to be more realistic than for the unmodified model; this reflects the dynamic changes of the inflow parameters during discharge in our model. Furthermore, the temporal and spatial variations of the different plasma species in the discharge chamber were numerically studied. The numerical studies showed that polytetrafluoroethylene plasma was mainly composed of monovalent ions; carbon and fluorine ions were concentrated in the upstream and downstream discharge chamber, respectively. The results based on this modified model were in good agreement with the experimental formation times of the various plasma species. A large number of short-lived and highly ionized carbon and fluorine species (divalent and trivalent ions) were created duringmore » initial discharge. These highly ionized species reached their peak density earlier than the singly ionized species.« less

Authors:
 [1];  [2]; ;  [1];  [3];  [4]
  1. Beijing Research Institute of Precise Mechatronic Controls, Beijing 100076 (China)
  2. (China)
  3. School of Astronautics, Beihang University, Beijing 100191 (China)
  4. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081 (China)
Publication Date:
OSTI Identifier:
22599969
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 7; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; CARBON; COMPUTERIZED SIMULATION; DENSITY; FLUORINE; FLUORINE IONS; INTERACTIONS; IONIZATION; NUMERICAL ANALYSIS; ONE-DIMENSIONAL CALCULATIONS; PLASMA; POLYTETRAFLUOROETHYLENE; PULSES; PYROLYSIS; THRUSTERS; VAPORS; WALLS

Citation Formats

Yang, Lei, School of Astronautics, Beihang University, Beijing 100191, Zeng, Guangshang, Huang, Yuping, Tang, Haibin, and Liu, Xiangyang. Numerical studies of wall–plasma interactions and ionization phenomena in an ablative pulsed plasma thruster. United States: N. p., 2016. Web. doi:10.1063/1.4959807.
Yang, Lei, School of Astronautics, Beihang University, Beijing 100191, Zeng, Guangshang, Huang, Yuping, Tang, Haibin, & Liu, Xiangyang. Numerical studies of wall–plasma interactions and ionization phenomena in an ablative pulsed plasma thruster. United States. doi:10.1063/1.4959807.
Yang, Lei, School of Astronautics, Beihang University, Beijing 100191, Zeng, Guangshang, Huang, Yuping, Tang, Haibin, and Liu, Xiangyang. Fri . "Numerical studies of wall–plasma interactions and ionization phenomena in an ablative pulsed plasma thruster". United States. doi:10.1063/1.4959807.
@article{osti_22599969,
title = {Numerical studies of wall–plasma interactions and ionization phenomena in an ablative pulsed plasma thruster},
author = {Yang, Lei and School of Astronautics, Beihang University, Beijing 100191 and Zeng, Guangshang and Huang, Yuping and Tang, Haibin and Liu, Xiangyang},
abstractNote = {Wall–plasma interactions excited by ablation controlled arcs are very critical physical processes in pulsed plasma thrusters (PPTs). Their effects on the ionization processes of ablated vapor into discharge plasma directly determine PPT performances. To reveal the physics governing the ionization phenomena in PPT discharge, a modified model taking into account the pyrolysis effect of heated polytetrafluoroethylene propellant on the wall–plasma interactions was developed. The feasibility of the modified model was analyzed by creating a one-dimensional simulation of a rectangular ablative PPT. The wall–plasma interaction results based on this modified model were found to be more realistic than for the unmodified model; this reflects the dynamic changes of the inflow parameters during discharge in our model. Furthermore, the temporal and spatial variations of the different plasma species in the discharge chamber were numerically studied. The numerical studies showed that polytetrafluoroethylene plasma was mainly composed of monovalent ions; carbon and fluorine ions were concentrated in the upstream and downstream discharge chamber, respectively. The results based on this modified model were in good agreement with the experimental formation times of the various plasma species. A large number of short-lived and highly ionized carbon and fluorine species (divalent and trivalent ions) were created during initial discharge. These highly ionized species reached their peak density earlier than the singly ionized species.},
doi = {10.1063/1.4959807},
journal = {Physics of Plasmas},
number = 7,
volume = 23,
place = {United States},
year = {Fri Jul 15 00:00:00 EDT 2016},
month = {Fri Jul 15 00:00:00 EDT 2016}
}