Study of the dynamic behavior of the rail plasma actuator arc

Gray, Miles; Choi, Young-Joon; Sirohi, Jayant; Raja, Laxminarayan L.

doi:10.1088/1361-6463/aacfb9

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…The most studied configuration for the displacement of an electric arc is the displacement between parallel electrodes consisting of metallic bars [14][15][16][17][18]. The arc moves forward due to the Laplace force coming from his self-induced magnetic field or enhanced by an external one.…”

Section: Arc Root Displacement In Literaturementioning

confidence: 99%

“…Depending on the experimental conditions, the cathode arc may present a jumping pattern of displacement as well and there might be multiple-up to four-distinct anodic arc roots [14,15,[18][19][20]. In these configurations, the cathodic arc root was either preceding the anodic arc root [15,16] or not [14,18]. Secker and Guile [19] also classifies four types of cathodic arc roots tracks that matches different types of displacement: discontinuous (jumping mode), regular (continuous with tracks of a regular size due to relatively low dwell time), sticking (continuous with tracks of important size due to relatively important dwell time) and high speed (continuous with thin tracks).…”

Section: Arc Root Displacement In Literaturementioning

confidence: 99%

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Arc root dynamics in the context of lightning strikes to aircraft

Andraud,

Martins,

Zaepffel

et al. 2024

J. Phys. D: Appl. Phys.

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During lightning strikes to aircraft, there is a displacement of the impacted area on the aircraft’s surface and the dynamic of the arc root is a key to understanding and predicting the damage produced on the aircraft skin. This work aims at studying experimentally this dynamic with a new method of producing sweeping arcs based on a stationary arc and an electromagnetic launcher propelling aeronautical test samples. The experiments are also achieved with a wind tunnel that blows the arc on the test sample for comparison. After a description of the previous experiments of arc root displacement and a distinction between the cathodic and anodic emission processes, this paper characterizes the arc root physical properties with direct visualization through high-speed cameras and electric measurements for different initial conditions. The results are separated by the arc root polarity and discussed to give an insight into the influence of the experimental conditions on the interaction between the electric arc root and the test sample during swept-stroke. It is shown that for a cathodic arc root, the nature of the displacement – continuous or jumping – highly depends on the current level and the speed of the relative motion between the electric arc and the test sample. For an anodic arc roots, the variations of these parameters provoke jumping modes of displacement with different characteristics.

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Section: Arc Root Displacement In Literaturementioning

confidence: 99%

Section: Arc Root Displacement In Literaturementioning

confidence: 99%

Arc root dynamics in the context of lightning strikes to aircraft

Andraud,

Martins,

Zaepffel

et al. 2024

J. Phys. D: Appl. Phys.

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Development of an arc root model for studying the electrode vaporization and its influence on arc dynamics

et al. 2020

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Plasma–solid interaction represents a major concern in many applications such as power-interruption and plasma–metal processing. Characterized by high-current density and voltage drop, the arc roots dissipate intensive heat to electrode vaporization, which participates in the ionization and, thereby, significantly alters the plasma properties and gas dynamics. Most of the arc root models feature approaches based on surface temperature or (temperature dependent) current density. Due to the complexity of conjugated heat transfer across arc roots involving three-phase interactions of plasma with liquid spots and solid electrodes, accurately determining the surface temperature distribution is extremely computationally demanding. Hence, models hitherto fail to quantitatively estimate neither the molten spot size nor the total amount of vaporization. In this work, we propose an arc root model featuring a hemispherical structure that correlates the molten spot size with the heat partition between conduction and vaporization to estimate the energy dissipation at arc roots and, thus, to trace the vaporization rate. Following local partial pressure adjusted Langmuir vaporization, we deduce an analytical solution of molten spot size for quasi-steady-state, which compares favorably with experiments. Specifically, the vaporization dominates over conduction for large molten spots as in the case of high-current arcs. However, for low-current arcs, the vaporization heat is trivial compared with conduction. Furthermore, we integrate this arc root model into a study case of arc plasma based on the magnetohydrodynamics method. The simulated arc voltage and arc displacement match with the experiment. This model is expected to find broad applications in power interruption and plasma etching.

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Study of the dynamic behavior of the rail plasma actuator arc

Cited by 2 publications

References 26 publications

Arc root dynamics in the context of lightning strikes to aircraft

Arc root dynamics in the context of lightning strikes to aircraft

Development of an arc root model for studying the electrode vaporization and its influence on arc dynamics

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