Results 41 to 50 of about 2,187 (197)

Fractal Dimension of dieletric breakdown

, 1984
It is shown that the simplest nontrivial stochastic model for dielectric breakdown naturally leads to fractal structures for the discharge pattern.
WIESMANN H. J., NIEMEYER L., PIETRONERO, Luciano   +2 more
core   +1 more source

Pressure-Dependent Breakdown Voltage in SF₆/Epoxy Resin Insulation Systems: Electric Field Enhancement Mechanisms and Interfacial Synergy

Energies
In SF6 gas-insulated equipment, solid dielectrics critically degrade insulation performance by reducing the electric field’s ability to withstand gas gaps.
Lin Liu, Qiaogen Zhang, Xiangyang Peng, Xiaoang Li, Zheng Wang, Shihu Yu   +5 more
doaj   +1 more source

Influence of Oxygen on the Multiple-Current-Pulse Behavior in an Atmospheric Homogeneous Helium Dielectric Barrier Discharge With Air Impurities

IEEE Access, 2020
In this paper, through a one-dimensional fluid model, we investigate the influence of oxygen on the multiple-current-pulse (MCP) behavior in an atmospheric homogeneous dielectric barrier discharge (HDBD) in helium with air impurities. From the simulation
Ling Luo, Zeen Huang, Qiao Wang, Dong Dai, Licheng Li   +4 more
doaj   +1 more source

Controlling the number of discharge current pulses in an atmospheric dielectric barrier discharge by voltage waveform tailoring

AIP Advances, 2021
Atmospheric dielectric barrier discharges driven by tailored voltage waveforms are investigated numerically with a one-dimensional fluid model. We use the multi-frequency pulse-type voltage waveform as the control method and the harmonics N as the ...
Zeen Huang, Yuhui Zhang, Dong Dai, Qiao Wang   +3 more
doaj   +1 more source

On the optimization of healing conditions for multifunctional recovery in natural rubber/polycaprolactone and natural rubber/polyethylene oxide thermoplastic elastomers

Polymer Testing
Electrical insulation faces severe mechanical, electrical, thermal, and environmental stresses, where defects distort the local field and initiate partial discharges and compromise dielectric integrity, requiring costly repair or replacement.
M Hassan Raza, Francesco Guastavino, Laura Della Giovanna, Eugenia Torello, Itziar Mas-Giner, María Hernández-Rivas, Marianella Hernández Santana, Pilar Tiemblo   +7 more
doaj   +1 more source

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

High Voltage
A dual‐frequency (DF) dielectric barrier discharge, excited by the superposition of a 50 Hz low frequency (LF) and a 5000 Hz intermediate frequency (IF), is proposed to enhance discharge.
Junwen He, Bangfa Peng, Guanglin Yu, Ronggang Wang, Nan Jiang, Jie Li, Yan Wu   +6 more
doaj   +1 more source

Characterization of Partial Discharges in Dielectric Oils Using High-Resolution CMOS Image Sensor and Convolutional Neural Networks

Sensors
In this work, an exhaustive analysis of the partial discharges that originate in the bubbles present in dielectric mineral oils is carried out. To achieve this, a low-cost, high-resolution CMOS image sensor is used.
José Miguel Monzón-Verona, Pablo González-Domínguez, Santiago García-Alonso   +2 more
doaj   +1 more source

Growing discharge trees with self-consistent charge transport: the collective dynamics of streamers

New Journal of Physics, 2014
We introduce the generic structure of a growth model for branched discharge trees that consistently combines a finite channel conductivity with the physical law of charge conservation.
Alejandro Luque, Ute Ebert
doaj   +1 more source

First ground-based observations of sprites over southern Africa

South African Journal of Science, 2018
Sprites are the optical signatures of electrical discharges in the mesosphere triggered by large lightning strikes associated with thunderstorms. Since their discovery in the late 1980s, sprites have been observed extensively around the world, although ...
Stanislaus Nnadih, Mike Kosch, Peter Martinez, Jozsef Bor   +3 more
doaj   +1 more source

PVC nanocomposites for cable insulation with enhanced dielectric properties, partial discharge resistance and mechanical performance

High Voltage, 2020
The current study aims to develop polyvinyl chloride (PVC) nanocomposites with enhanced electrical and mechanical properties by incorporating titanium oxide (TiO(2)) nanoparticles within PVC chains.
Nagat M.K. Abdel-Gawad, Adel Z. El Dein, Diaa-Eldin A. Mansour, Hanaa M. Ahmed, Mohamed M.F. Darwish, Matti Lehtonen   +5 more
doaj   +1 more source