Ablation Controlled Arcs

Ruchti, C. B.; Niemeyer, L.

doi:10.1109/tps.1986.4316570

Cited by 204 publications

(142 citation statements)

References 12 publications

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“…4,5,6 Some initial theoretical models aimed to analyze existing experimental data and build a phenomenological description of the ablation processes. Later, more sophisticated steady state 7,8 and unsteady theoretical models 9,10,11 were proposed to describe capillary discharges for an electrothermal gun. However, these models are based on various assumptions about the ablation rate.…”

Section: Introductionmentioning

confidence: 99%

Ablation Study in a Capillary Sustained Discharge

et al. 2007

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Abstract-Electrothermal-chemical (ETC) ignitionsystems have been demonstrated in gun systems to provide desirable characteristics including reproducible shorter ignition delays. The optimum combination of capillary tube and fuse wire properties has not been identified yet. We present a combined theoretical and experimental study of the capillary discharge with an aim to develop a capillary plasma source with efficient energy conversion. The major emphasis in the present capillary discharge model is the ablation phenomenon. Consideration is given to different characteristic subregions near the ablated surface: namely, a space-charge sheath, a Knudsen layer, and a hydrodynamic layer. A kinetic approach is used to determine the parameters at the interface between the kinetic Knudsen layer and the hydrodynamic layer. Coupling the solution of the nonequilibrium Knudsen layer with the hydrodynamic layer provides a self-consistent solution for the ablation rate. According to the model predictions, the peak electron temperature is about 1.4 eV, the polyethylene surface temperature is about 700 K, and the pressure is about 10 MPa in the case of a 0.6 kJ discharge. In parallel, a parametric experimental study of the capillary ablation process is conducted. The ablation rates are measured for capillary tubes made of polyethylene and Teflon. Both experimental measurements and simulations indicate that the ablated mass increases with the peak discharge current and that a smaller diameter capillary yields a larger ablated mass. It is found that model predictions agree well with experimental measurements. Report Documentation PageForm Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

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Section: Introductionmentioning

confidence: 99%

Ablation Study in a Capillary Sustained Discharge

et al. 2007

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“…The core of the cable is not able to provide, by cathodic spot emission, enough metallic vapors to maintain an arc pressure. A gas inflow as for plasma torch [18] or an expendable "wall" material [19] as the Tefzel sheath is necessary to feed and thus maintain an arc. Here, once all the oxides and contaminants of the metal core surface are evaporated, the arc stops.…”

Section: Discussionmentioning

confidence: 99%

Secondary Arcing Triggered by Hypervelocity Impacts on Solar Panel Rear-Side Cables With Defects—Comparison With Laser Impacts

Siguier

Inguimbert

Murat

et al. 2017

IEEE Trans. Plasma Sci.

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. Secondary arcing triggered by hypervelocity impacts on solar panel rear side cables with defects -Comparison with laser impacts. IEEE Transactions on Plasma Science, Institute of Electrical and Electronics Engineers, 2017, 45 (8), pp.1880 -1886. 10.1109/TPS.2017 This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination.

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“…Electric field is computed statically using a simple Laplace equation for the electric potential. The mass source term is added to represent the effect of PTFE nozzle material ablation and the erosion of the arcing contacts as in [6] and [7]. In order to take turbulence effects into account the realizable k-model [6] is used.…”

Section: Mathematical Modelmentioning

confidence: 99%

Experiment and CFD simulation of exhaust tube in highvoltage circuit breaker

Pisu

Grob

et al. 2018

MATEC Web Conf.

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Abstract. In a high-voltage circuit breaker, the exhaust tube connects the arc zone with the exhaust volume. During the arc interruption process, the exhaust tube transports the hot gas from the arc interruption zone to the exhaust volume through its distributed holes. The design of a high performance exhaust tube in the circuit breaker development aims for well controlled hot gas evacuation mass flow and pressure waves. In this paper, the exhaust tube behaviour is investigated using Computational Fluid Dynamics (CFD). To verify the CFD simulation, a basic experimental study with pressure measurements at different positions of the exhaust tube is performed. Further, the design parameters influencing the exhaust tube behaviour and circuit breaker performance are investigated and discussed.

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Ablation Controlled Arcs

Cited by 204 publications

References 12 publications

Ablation Study in a Capillary Sustained Discharge

Ablation Study in a Capillary Sustained Discharge

Secondary Arcing Triggered by Hypervelocity Impacts on Solar Panel Rear-Side Cables With Defects—Comparison With Laser Impacts

Experiment and CFD simulation of exhaust tube in highvoltage circuit breaker

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