Experimental studies on electrical breakdown field strength of electrode with water mist containing MC additives

Fang, Fang; Yudong,; Liu, Ming; Jianghong,; Liao,; Guangxuan,; Xu, Jiang; Qiang, Qiang; Zhou, Quan; Xiaomeng,

doi:10.1360/982005-186

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…The reason is that the high temperatures [almost 1.45×10 4 K (Cheng et al, 2010)], heat exchanges and particle densities in the intermittent zone have been greatly reduced, the gap is not much different from that of pure air. Meanwhile, it is also proved that the average breakdown field strength decreases with the increase of distance in air (Fang et al, 2005;Yu-Chien et al, 2019).…”

Section: Breakdown Mechanisms and Influencing Factors Of Wire-wire Gapsmentioning

confidence: 95%

Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames

Chen

You²,

Xu³

et al. 2023

Front. Earth Sci.

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In recent years, events of transmission line tripping caused by wildfires have occurred frequently in many mountain areas. In order to understand the mechanism of such events, an experimental system for simulating breakdown discharge processes of model wires induced by a simulated fire source is designed. In this experiment, propane jet flame (somewhat like eruptive fires in real wild fires) is used as a simulated flame source. By setting three different gas flow rates and five different wire-wire gaps, discharge breakdown behaviors and characteristics between two ACSR (aluminum conductors steel reinforced) segments in propane flames with three flame zones are explored. The influences of these different factors on the breakdown characteristics and mechanisms of wire-wire air gaps are analyzed. Results show that breakdown voltages increase almost linearly with the increase of wire-wire gaps in continuous zone of the flames for three gas flow rates. For a short wire-wire gap like 5.0 cm, the pilot discharge channels can be formed more easily, stably and completely under a lower voltage and weaker external ionization environment. The propane jet flame conditions are complex and affected by multiple actions like initial jet force (affected by gas flow rate), temperature distribution, soot particle, ion wind. As a result, local electric field will be distorted, a streamer channel is established dependently in different cases. These factors play individual, competitive or synergistic roles at the same time in breakdowns of real ACSR wire-wire gaps.

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Section: Breakdown Mechanisms and Influencing Factors Of Wire-wire Gapsmentioning

confidence: 95%

Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames

Chen

You²,

Xu³

et al. 2023

Front. Earth Sci.

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“…Under the same water pressure, an increase in height leads to improved sprinkling uniformity. Several studies [20][21][22][23][24] suggested that the water mist environment generated during the rain test could be simulated using a spray tower stand. Conducting experimental research in this context can yield data on rainfall intensity and sprinkling uniformity.…”

Section: Icmsoa-2023mentioning

confidence: 99%

Experimental Study on Spray Uniformity

Chen,

Li,

et al. 2024

J. Phys.: Conf. Ser.

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This study involves simulating rainfall conditions to analyze rainfall intensity and spray uniformity, conducting environmental experimental research. Using numerical analysis methods, water mass fraction cloud maps under different flow conditions were obtained to determine the relationship between uniformity, water flow rate, and water mass fraction. Based on the simulation results in accordance with relevant standards, two methods for measuring rainfall uniformity are selected based on water pressure, nozzle type, and spray height as basic parameters for setting measurement points, and rainfall environmental simulation experiments are conducted. The theoretical analysis provides a clearer representation of water quality distribution than steady-state analysis; water mass fraction is proportional to water flow rate, while uniformity is independent of water flow rate. Through comprehensive comparison of uniformity data for different nozzle models under varying water pressure and height conditions, recommendations are made for the placement of rain gauges in rainfall environmental experiments. Adjusting various test environment parameters can provide references for the test lab to accurately select test equipment, parameter measurement, and evaluation; the water mist environment generated during rainfall is simulated through spray towers, and the numerical uniformity test results of the water mist environment are consistent with the requirements, providing theoretical data support for developing more authoritative test methods for equipment sprinkler tests and ultra-fine water mist environment simulation in the future.

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Research progress of water mist fire extinguishing technology and its application in battery fires

Cui

Liu

2021

Process Safety and Environmental Protection

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Experimental studies on electrical breakdown field strength of electrode with water mist containing MC additives

Cited by 3 publications

References 1 publication

Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames

Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames

Experimental Study on Spray Uniformity

Research progress of water mist fire extinguishing technology and its application in battery fires

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