Results 71 to 80 of about 63,606 (258)

Characterization of high-current pulsed arcs ranging from 100--250 kA peak [PDF]

, 2019
In this paper, we present the laboratory study on three experimental setups that produce a free arc channel subjected to the transient phase of a lightning current waveform.
Chemartin, L., Lago, Frédéric, Lalande, Philippe, Martins, Rafael Sousa, Zaepffel, Clement   +4 more
core   +2 more sources

Investigating Spatial‐Temporal Optical Emission Spectroscopy of Unstable Positive Leaders in Long Sparks Under Atmospheric Pressure

High Voltage, EarlyView.
ABSTRACT This study explores exciting state species and reaction pathways in positive leaders to better understand the breakdown mechanisms of long air gap discharges and natural lightning. Emission spectra from an unstable positive leader in a 1 m rod‐plate air gap under switching impulse voltages were observed, spanning 300–800 nm.
Hengxin He, Yubin Huang, Wanxia Zhang, Chang Liu, Xiuyuan Yao, Yu Ying, Weijiang Chen   +6 more
wiley   +1 more source

Analysis of Time-Domain Characteristics of Microsecond-Scale Repetitive Pulse Discharge Events in Lightning

Atmosphere
To clarify the background of multiple burst (MB) specifications in the aviation lightning test standards, a broadband lightning electromagnetic field measurement system was employed to collect 91 sets of VLF/LF band nature flash data.
Jinxing Shen, Zheng Sun, Lihua Shi, Shi Qiu   +3 more
doaj   +1 more source

Evaluation Methodology, Numerical Verification and Retrofilling Procedure for Power Transformers to Ensure K‐Class Flame Retardancy and Environmentally Friendly

High Voltage, EarlyView.
ABSTRACT With increasing demands for fire safety and environmental friendliness, retrofilling transformers with alternative insulating liquids has become a growing trend. However, retrofilling power transformers remains uncertain, as more residual mineral oil compromises K‐class flame retardancy, and its impact on environmental performance has yet to ...
Zhenfu Tang, Yihua Qian, Dan Zhou, Wei Hu, Feipeng Wang, Yang Xu   +5 more
wiley   +1 more source

Enhanced earthing performance by improved design and grounding material properties [PDF]

, 2018
An enhance ground electrode (E.G.E.) is a portable grounding system that acts as an additional grounding system, designed for zero potential reference points. The E.G.E could eliminate the increasing of resistance in grounding conductor as it placed next
Mohd Hasni, Nur Alyaa
core  

First results from the TUS orbital detector in the extensive air shower mode

, 2017
TUS (Tracking Ultraviolet Set-up), the first orbital detector of extreme energy cosmic rays (EECRs), those with energies above 50 EeV, was launched into orbit on April 28, 2016, as a part of the Lomonosov satellite scientific payload. The main aim of the
Biktemerova, S. V., Botvinko, A. A., Chirskaya, N. P., Eremeev, V. E., Garipov, G. K., Grebenyuk, V. M., Grinyuk, A. A., Jeong, S., Kalmykov, N. N., Khrenov, B. A., Kim, M., Klimov, P. A., Lavrova, M. V., Lee, J., Martinez, O., Panasyuk, M. I., Park, I. H., Petrov, V. L., Ponce, E., Puchkov, A. E., Salazar, H., Saprykin, O. A., Senkovsky, A. N., Sharakin, S. A., Shirokov, A. V., Tkachenko, A. V., Tkachev, L. G., Yashin, I. V., Zotov, M. Yu.   +28 more
core   +1 more source

Correlated Transient Response of Buried Cables and Lightning Channel Radiation of Return Strokes of Five Rocket‐Triggered Lightning Strikes

High Voltage, EarlyView.
ABSTRACT Data from five rocket‐triggered lightning flashes are adopted to analyse the correlated transient response of buried cables and lightning channel radiations. These five flashes have the same termination point that is right above the buried cables and involve a total of 32 return strokes.
Mi Zhou, Xiaoyu Lei, Li Cai, Jianguo Wang, Weihan Zhao, Jinxin Cao, Denglei Duan, Maorong Geng, Yadong Fan, Jianping Wang   +9 more
wiley   +1 more source

Evaluation of color stability of ice cream with Spirulina platensis by image processing [PDF]

BIO Web of Conferences
The current study aimed to evaluate the color stability of ice cream samples with added Spirulina platensis powder by image processing. The change in color characteristics was monitored during 30 days of storage at -18°C. Images of the examined ice cream
Boyanova Petya, Bosakova-Ardenska Atanaska, Danev Angel, Kutryanska Magdalina, Dobreva Valentina, Chavdarova Ani, Gradinarska Dilyana   +6 more
doaj   +1 more source

Shield to Pin Coupling of Lightning-Like Transients on Payload Umbilical Cables on a Launch Pad [PDF]

In this paper we describe in-situ testing of a long payload umbilical, on a launch site, injected with lightning- like transients and describe resulting pin-to-pin voltages.
Edwards, Paul, Gonzalez, Guillermo, Tracz, Jarek, Trout, Dawn   +3 more
core   +1 more source

Study of Positive Corona Discharge of Needle Plate Electrodes in Airflow

High Voltage, EarlyView.
ABSTRACT For high‐speed moving objects such as aircraft and wind turbine blades, discharge occurs under strong airflow. Research on lightning attachment characteristics has been extensive, whereas the role of corona discharge in pre‐breakdown streamer development has received less attention.
Lei Lan, Zhengxian Du, Qiang Wu, Yeqiang Deng, Yu Wang, Zeliang Wu, Xiankang Wang   +6 more
wiley   +1 more source