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Cited by 22Electromagnetic Launch and Propulsion TechnologyPulsed Power Technology ApplicationsVacuum and Plasma Arcs

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

Computational and experimental investigation of plasma deflagration jets and detonation shocks in coaxial plasma accelerators

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Subramaniam, Vivek, Underwood, Thomas C, Raja, Laxminarayan L, Cappelli, Mark A·2018·Plasma Sources Science and Technology
DOI 10.1088/1361-6595/aaabec
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Abstract

We present a magnetohydrodynamic (MHD) numerical simulation to study the physical mechanisms underlying plasma acceleration in a coaxial plasma gun. Coaxial plasma accelerators are known to exhibit two distinct modes of operation depending on the delay between gas loading and capacitor discharging. Shorter delays lead to a high velocity plasma deflagration jet and longer delays produce detonation shocks. During a single operational cycle that typically consists of two discharge events, the plasma acceleration exhibits a behavior characterized by a mode transition from deflagration to detonation. The first of the discharge events, a deflagration that occurs when the discharge expands into an initially evacuated domain, requires a modification of the standard MHD algorithm to account for rarefied regions of the simulation domain. The conventional approach of using a low background density gas to mimic the vacuum background results in the formation of an artificial shock, inconsistent with the physics of free expansion. To this end, we present a plasma-vacuum interface tracking framework with the objective of predicting a physically consistent free expansion, devoid of the spurious shock obtained with the low background density approach. The interface tracking formulation is integrated within the MHD framework to simulate the plasma deflagration and the second discharge event, a plasma detonation, formed due to its initiation in a background prefilled with gas remnant from the deflagration. The mode transition behavior obtained in the simulations is qualitatively compared to that observed in the experiments using high framing rate Schlieren videography. The deflagration mode is further investigated to understand the jet formation process and the axial velocities obtained are compared against experimentally obtained deflagration plasma front velocities. The simulations are also used to provide insight into the conditions responsible for the generation and sustenance of the magnetic pinch. The pinch width and number density distribution are compared to experimentally obtained data to calibrate the inlet boundary conditions used to set up the plasma acceleration problem.

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  • Pulsed inductive thrusters that operate in a deflagration mode have been shown to operate with much lower amounts of propellant (down to ∼10 μg/s).

    “In contrast, pulsed induc- tive thrusters that operate in a deflagration mode are an example of propulsion devices that have been shown to operate with much lower amounts of propellant (down to ∼ 10 µ g/s ) [11,19,20,24].”

    From Requirements for air-breathing electric propulsion in low-altitude orbits (2024) · cites this paper as [24]

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Metadata

Authors
Subramaniam, V., Underwood, T. C., Raja, L. L., & Cappelli, M. A.
Affiliations
  • The University of Texas at Austin (US)
  • Stanford University (US)
Corresponding author
Subramaniam, Vivek
ORCID
Venue
Plasma Sources Science and Technology
Publisher
IOP Publishing
Published
2018-02-01
Volume
27
Issue
2
Pages
025016
ISSN
  • 0963-0252 (ISSN-L)
  • 1361-6595
DOI
10.1088/1361-6595/aaabec
OpenAlex
W2790137089
Cited by
22
References
36
Citations by year
2026: 5 · 2025: 2 · 2024: 4 · 2023: 1 · 2021: 3 · 2020: 3 · 2019: 4
FWCI
2.03
Type
journal article
Language
en
Open access
Licence
Locations
  • Plasma Sources Science and Technology (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
National Nuclear Security Administration (DE-NA0002922)
Topics
  • Physical Sciences › Engineering › Aerospace Engineering › Electromagnetic Launch and Propulsion Technology
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Pulsed Power Technology Applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Vacuum and Plasma Arcs
Keywords
coaxial plasma accelerator, magnetohydrodynamic simulations, rarefied plasma, free expansion, magnetic pinch, mode switching, plasma gun, schlieren imaging

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