Paschen’s Law in Extreme Pressure and Temperature Conditions

Galli, G; Hamrita, H.; Jammes, C.; Kirkpatrick, Mike; Odic, Emmanuel; Dessante, Philippe; Molinié, Philippe

doi:10.1109/tps.2019.2896352

Cited by 22 publications

(9 citation statements)

References 14 publications

(18 reference statements)

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“…Considering the effect of gas electrification at high temperature, Galli et al (2019) showed that the breakdown voltage for argon gas increases by around 25% for an increase in temperature from RT to 400°C at a pressure of 1 MPa, which is very similar to the nozzle pressures measured here (0.8 to 1.1 MPa). For our experiments this would mean that the jets at elevated temperatures need more charge buildup to discharge and neutralize larger charges simultaneously.…”

Section: Influence Of Temperaturesupporting

confidence: 83%

Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature

Stern

Cimarelli

Gaudin

et al. 2019

Geophysical Research Letters

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Volcanic lightning-a near ubiquitous feature of explosive volcanic eruptions-possesses great potential for the analysis of volcanic plume dynamics. To date, the lack of quantitative knowledge on the relationships between plume characteristics hinders efficient data analysis and application of the resulting parameterizations. We use a shock-tube apparatus for rapid decompression experiments to produce particleladen jets. We have systematically and independently varied the water content (0-27 wt%) and the temperature (25-320°C) of the particle-gas mixture. The addition of a few weight percent of water is sufficient to reduce the observed electrification by an order of magnitude. With increasing temperature, a larger number of smaller discharges are observed, with the overall amount of electrification staying similar. Changes in jet dynamics are proposed as the cause of the temperature-dependence, while multiple factors (including the higher conductivity of wet ash) can be seen responsible for the decreased electrification in wet experiments.Plain Language Summary Volcanic explosive eruptions are accompanied by lightning strikes generated from the volcanic dust cloud. Here we have experimentally studied the effects of atmospheric water and plume temperature on the frequency and intensity of the lightning strikes. The results will feed a model for the use of volcanic lightning strikes to estimate plume contents and intensity. Key Points:• Natural observations on the influence of temperature and water content on volcanic lightning have been modelled in laboratory experiments. • The magnitude of electrification and discharging in plumes decreases significantly with added water. • At higher temperatures a decrease in magnitude of individual discharges is observed, while the total neutralized charge stays similar.

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Section: Influence Of Temperaturesupporting

confidence: 83%

Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature

Stern

Cimarelli

Gaudin

et al. 2019

Geophysical Research Letters

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“…However, the voids below the bottom side of the clip were not diffused easily. The voids remaining under the clip were able to cause electrical discharge, such as corona discharge, arc discharge, and spark discharge [32][33][34][35]. The electrical discharge is generated due to the voids and may cause degradation in reliability with respect to the characteristics of the power module.…”

Section: Discussionmentioning

confidence: 99%

Theoretical and experimental analysis of a venting clip to reduce stray inductance in high‐power conversion applications

et al. 2021

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“…According to the air gap discharge characteristics [26,27], there is a complex multidimensional nonlinear relationship between gap breakdown and various factors, such as the contact structure, voltage waveform, and atmospheric environment. However, when the voltage waveform and environmental features of the same gap remain unchanged, the breakdown voltage distribution remains in a particular range.…”

Section: A Recovery Voltage Waveform Of Low-voltage Circuit Breakermentioning

confidence: 99%

Study on the Influence of Reignition on Electrical Life Distribution of Low-Voltage Circuit Breakers

2021

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This study analyzes the recovery voltage changes when a low-voltage circuit breaker opens with load and short-circuit faults and explains the reignition types under different recovery voltages. Reignition probability models of a single-pole contact and three-pole contact under different reignition types are established. The variation law of the contact erosion amount with the arc starting phase angle is analyzed. The distribution characteristics of the electrical life under three reignition types are obtained by simulating the low-voltage circuit breaker electrical life with a random arc starting phase angle. The results show that the electrical life of contacts obviously decreases after reignition, and that the electrical life changes differently with different reignition types. Specifically, the electrical life of a single-pole contact and three-pole contact is reduced by different degrees for the same reignition type. Hence, the influence of reignition on the electrical life distribution characteristics of a low-voltage circuit breaker cannot be ignored. INDEX TERMSElectrical life distribution, low-voltage circuit breaker, recovery voltage, reignition probability model.

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Paschen’s Law in Extreme Pressure and Temperature Conditions

Cited by 22 publications

References 14 publications

Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature

Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature

Theoretical and experimental analysis of a venting clip to reduce stray inductance in high‐power conversion applications

Study on the Influence of Reignition on Electrical Life Distribution of Low-Voltage Circuit Breakers

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