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Journal articles on the topic 'And spark discharge'

Author: Grafiati

Published: 11 December 2022

Last updated: 31 July 2025

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1

Eckhoff, Rolf K. "Ignition of Combustible Dust Clouds by Strong Capacitive Electric Sparks of Short Discharge Times." Zeitschrift für Physikalische Chemie 231, no. 10 (2017): 1683–707. http://dx.doi.org/10.1515/zpch-2016-0935.

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Abstract It has been known for more than half a century that the discharge times of capacitive electric sparks can influence the minimum ignition energies of dust clouds substantially. Experiments by various workers have shown that net electric-spark energies for igniting explosive dust clouds in air were reduced by a factor of the order of 100 when spark discharge times were increased from a few μs to 0.1–1 ms. Experiments have also shown that the disturbance of the dust cloud by the shock/blast wave emitted by “short” spark discharges is a likely reason for this. The disturbance increases wi

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2

Steinberg, Gabriel, and Naomi Watanabe. "Simulating Lightning Discharges: The Influence of Environmental Conditions on Ionization and Spark Behavior." Atmosphere 16, no. 7 (2025): 831. https://doi.org/10.3390/atmos16070831.

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This study investigates the behavior of spark discharges under various environmental conditions to simulate aspects of early-stage lightning dynamics, with a focus on their spectral characteristics, propagation, and ionization behavior. In a laboratory setting, spark discharges generated by a Tesla coil operating with high-frequency alternating current (AC) were analyzed under varying air humidity and water surface conductivity. Spectral analysis revealed that the discharges are dominated by the second positive system of molecular nitrogen N2 (2P) and also exhibit the first negative system of

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3

Zhao, Zheng, Chenjie Li, Xinlei Zheng, Anbang Sun, and Jiangtao Li. "Periodical discharge regime transitions under long-term repetitive nanosecond pulses." Plasma Sources Science and Technology 31, no. 4 (2022): 045005. http://dx.doi.org/10.1088/1361-6595/ac6050.

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Abstract Intuitively, the nanosecond repetitively pulsed (NRP) corona and spark regimes are sustained successively after onsets due to the high background electron density and/or the surplus heat. In this paper, the NRP discharge unexpectedly swings among different regimes (corona → glow → spark → corona → …) in one pulse train, which is characterized by the periodical spark quench and reestablishment. We have investigated discharge regime instabilities by applying long-term repetitive high-voltage nanosecond pulses of ∼15 ns duration to needle–needle and needle–plane gaps in atmospheric-press

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4

Shcherba, A. A., N. I. Suprunovska, and M. A. Shcherba. "FEATURES OF THE FORMATION OF MULTI-CHANNEL PULSE CURRENTS AND FAST-MIGRATING ELECTRIC SPARKS IN THE LAYER OF CURRENT-CONDUCTING GRANULES OF ELECTRIC-DISCHARGE INSTALLATIONS." Tekhnichna Elektrodynamika 2022, no. 2 (2022): 3–11. http://dx.doi.org/10.15407/techned2022.02.003.

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The paper reveals the electro-physical features of the formation of multi-channel pulse currents and fast-migrating electric sparks in the layer of current-conductive granules of electric-discharge installations (EDIs) with reservoir capacitors. Such features make it possible to increase many times the productivity of the electric-spark dispersion of metal granules during single discharge current of reservoir capacitors, which flows between the electrodes of EDIs. Theoretical substantiation and experimental confirmation of multi-channel spark discharges in the layer of conductive granules are

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5

Gizatullin, F. A., and O. A. Yushkova. "Calculated determination of spark discharge parameters in capacitive ignition systems of gas turbine engines based on diagnosing voltages on storage capacitors." Izvestiâ Akademii nauk SSSR. Ènergetika, no. 6 (December 10, 2024): 88–97. https://doi.org/10.31857/s0002331024060062.

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The calculation results of the spark discharges probabilistic parameters in semiconductor spark plugs of capacitive ignition systems are presented: the energy and duration of discharges, discharge current and the criterion for the ignition ability of ignition systems based on measurements of two diagnostic quantities when it is impossible to directly measure these parameters under the conditions of gas turbine engines and full-scale test benches. Two voltages on the storage capacitor of ignition systems, measured by easily accessible means, are taken as diagnostic parameters – the voltage duri

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6

Pan, Ming Qiang, Yang Jun Wang, Tao Chen, Ji Zhu Liu, Li Guo Chen, and Shi Chun Di. "Study about Formation Mechanism of Red Spark Discharge of Micro-Arc Oxidation." Advanced Materials Research 764 (September 2013): 21–25. http://dx.doi.org/10.4028/www.scientific.net/amr.764.21.

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Formation mechanism of the micro-arc oxidation spark discharge is always a research problem; so far there isnt a theoretical model for analyzing the spark discharge formation which is widely recognized. Based on analyzing the reaction phenomena and the coating feature in the different periods of the red spark discharge, the formation model of the red spark discharge was established. The spark discharge formation mechanism is shown that it causes the spark discharge formation that the electron bombards the gas layer wrapping the coating in the infancy of red spark discharge stage; at the later

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7

Yan, Mu-Tian, and Pai-Hung Hsieh. "Monitoring and Adaptive Process Control of Wire Electrical Discharge Turning." International Journal of Automation Technology 8, no. 3 (2014): 468–77. http://dx.doi.org/10.20965/ijat.2014.p0468.

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This paper presents a novel pulse discriminating and control system for the identification of spark gap states, process monitoring and control of Wire Electrical Discharge Turning (WEDT). The relation between the proportion of open circuit, normal spark, arc discharge, short circuit to total sparks (defined as open circuit ratio, normal spark ratio, arc discharge ratio and short circuit ratio, respectively), ignition delay time and metal removal rate were experimentally studied and analyzed. A fuzzy logic controller was proposed to control both the arc discharge ratio and ignition delay time a

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8

Ali, Mohammad Yeakub, Abdus Sabur, Asfana Banu, Md Abdul Maleque, and Erry YT Adesta. "Micro Electro Discharge Machining for Nonconductive Ceramic Materials." International Journal of Engineering Materials and Manufacture 3, no. 1 (2018): 55–62. http://dx.doi.org/10.26776/ijemm.03.01.2018.07.

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In micro-electro discharge machining (micro-EDM) of nonconductive ceramics, material is removed mainly by spalling due to the dominance of alternating thermal load. The established micro-EDM models established for single spark erosion are not applicable for nonconductive ceramics because of random spalling. Moreover, it is difficult to create single spark on a nonconductive ceramic workpiece when the spark is initiated by the assisting electrode. In this paper, theoretical model of material removal rate (MRR) as the function of capacitance and voltage is developed for micro-EDM of nonconductiv

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9

Sakamoto, Yoshihiro, Takayoshi Tsutsumi, Hiromasa Tanaka, Kenji Ishikawa, Hiroshi Hashizume, and Masaru Hori. "Indoor Floor Heel Mark Removal Using Spark Discharges and Pressurized Airflow." Coatings 12, no. 12 (2022): 1938. http://dx.doi.org/10.3390/coatings12121938.

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Heel marks (HMs), which are the black stains made by shoe soles on indoor floors, can be difficult to remove. However, this study shows how spark discharges combined with pressurized airflow in 60 s discharge treatments can remove such HMs. We further show that maximizing the HM removal rates depended on the electrode gap distance because of changes in the spark discharge parameters. In our experiments, the electrical voltage waveforms are shown with voltage spikes, called spark discharges, and the spike numbers were counted in 0.6-ms time units. It was found that the number of spark discharge

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10

Zhang, Li, Li Bo Liu, and Bing Sun. "Degradation of Crystal Violet by Pulsed Corona and Spark Discharge: Determination of Removal Mechanism." Advanced Materials Research 781-784 (September 2013): 338–41. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.338.

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The pulsed discharge includes corona discharge and spark discharge. The voltage waveforms, photo, the decoloration rate of Crystal violet in corona discharge and spark discharge were investigated respectively. The results show that the spark discharge is more intense than the corona discharge. The decoloration rate of Crystal violet by spark discharge is 90%, which is higher than that corona discharge. From the UV-Visible and FTIR spectra, we can see that the molecular conjugated system and the benzene ring of CV were damaged by pulsed discharge.

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11

Liu, Jia, Mingshu Bi, Haipeng Jiang, and Wei Gao. "Evaluation of spark discharge." Journal of Electrostatics 107 (September 2020): 103500. http://dx.doi.org/10.1016/j.elstat.2020.103500.

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12

Wang, Wenqiang, Yifeng Yang, Cancan Liu, et al. "Study of Coating Growth Direction of 6061 Aluminum Alloy in Soft Spark Discharge of Plasma Electrolytic Oxidation." Materials 17, no. 12 (2024): 2947. http://dx.doi.org/10.3390/ma17122947.

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Conventional plasma electrolytic oxidation treatments produce oxide coatings with micron-scale discharge pores, resulting in insulation and wear and corrosion resistance far below that expected of highly dense Al2O3 coatings. The introduction of cathodic polarization during the plasma electrolytic oxidation process, especially when the applied cathode-to-anode current ratio (Rpn) is greater than 1, triggers a unique plasma discharge phenomenon known as “soft sparking”. The soft spark discharge mode significantly improves the densification of the anode ceramic layer and facilitates the formatio

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13

Шорсткий, И. А. "Экспериментальное исследование переноса вещества с поверхности сферической капли воды при обтекании плазменным каналом искрового разряда". Журнал технической физики 93, № 8 (2023): 1113. http://dx.doi.org/10.21883/jtf.2023.08.55972.38-23.

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The results of an experimental study of the water (vapor) molecules transfer from the surface of a spherical droplet towards the anode when a spark discharge plasma channel flows at atmospheric pressure air are presented. Distilled water and sodium chloride aqueous solution were used in the experiments. Using a high-speed amplitude amplifier with a monitor output, the discharge current and voltage waveforms were obtained for four experiments: a spark discharge, a spark discharge with a drop of distilled water, a spark discharge with a drop of sodium chloride aqueous solution and a spark discha

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14

Korytchenko, K. V., O. V. Shypul, D. Samoilenko, et al. "Numerical simulation of gap length influence on energy deposition in spark discharge." Electrical Engineering & Electromechanics, no. 1 (February 23, 2021): 35–43. http://dx.doi.org/10.20998/2074-272x.2021.1.06.

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The aim of the work is to study the influence of the length of the spark gap on energy input into the discharge channel during its gas-dynamic expansion. Methodology. The research is carried out by numerical modeling of the process of spark discharge development at variable values of the discharge gap length and at invariable other discharge conditions. The length of the gap was set in the range from 1 mm to 20 mm. The study was conducted using a numerical model of spark development, which takes into account the processes of nonstationary gas-dynamic expansion of the spark channel, the transie

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15

Ali, Mohammad Yeakub, Md Mazid Abdul, Abdus Sabur, and Mohamed Rahman. "Comparative Study of Material Removal Rate of Single-Spark And Multi-Spark Micro-EDM of Copper." International Journal of Engineering Materials and Manufacture 7, no. 2 (2022): 54–60. http://dx.doi.org/10.26776/ijemm.07.02.2022.02.

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Micro-electro discharge machining (micro-EDM), a noncontact material removal process, is a well-established technique for making mold cavity on any workpiece materials having a minimal electrical conductivity of 0.1 Scm-1. The spark between tool electrode (-ve) and workpiece electrode (+ve) removes materials mostly from workpiece. Knowing the time and amount of material removed in a single spark, MRR can be estimated. A number of analytical study have been reported for the estimation of MRR based on the ideal situation single-spark erosion. In case of multi-spark micro-EDM, charging and discha

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16

K.V., Korytchenko, Shypul O.V., Samoilenko D., et al. "Numerical simulation of gap length influence on energy deposition in spark discharge." Electrical Engineering & Electromechanics, no. 1 (February 25, 2021): 35–43. https://doi.org/10.20998/2074-272X.2021.1.06.

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<em>The <strong>aim</strong> of the work is to study the influence of the length of the spark gap on energy input into the discharge channel during its gas-dynamic expansion. <strong>Methodology</strong>. The research is carried out by numerical modeling of the process of spark discharge development at variable values of the discharge gap length and at invariable other discharge conditions. The length of the gap was set in the range from 1 mm to 20 mm. The study was conducted using a numerical model of spark development, which takes into account the processes of nonstationary ga

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17

Stelmashuk, Vitaliy, Vaclav Prukner, Karel Kolacek, et al. "Optical Emission Spectroscopy of Underwater Spark Generated by Pulse High-Voltage Discharge with Gas Bubble Assistant." Processes 10, no. 8 (2022): 1474. http://dx.doi.org/10.3390/pr10081474.

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This paper is aimed at the investigation of the acoustic and spectral characteristics of underwater electric sparks generated between two plate electrodes, using synchronized gas bubble injection. There are two purposes served by discharge initiation in the bubble. Firstly, it creates a favorable condition for electrical breakdown. Secondly, the gas bubble provides an opportunity for the direct spectroscopy of plasma light emission, avoiding water absorption. The effect of water absorption on captured spectra was studied. It was observed that the emission intensity of the Ha line and a shockwa

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18

Trenkin A. A., Almazova K. I., Belonogov A. N., Borovkov V. V., Dolotov A. S., and Morozov I. V. "Dynamics of structure of pulsed discharge in nitrogen and argon at different pressures in a "pin to plane" gap." Technical Physics 92, no. 9 (2022): 1153. http://dx.doi.org/10.21883/tp.2022.09.54678.58-22.

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Using high-speed shooting and shadow photography, the spatial structure of a pulsed discharge in a 1.5 mm long &quot;pin(cathode)-plane&quot; gap in nitrogen and argon in the pressure range from 0.25 to 2 atm was studied. It has been found that a spark discharge is realized in nitrogen and a diffuse form of discharge is realized in argon. For both cases, the presence of a microstructure of discharges in the studied pressure range was found, when the discharge is an aggregation of a large number of micron-diameter channels. It is shown that for each gas the dynamics of the discharge glo

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19

Kostyantyn, Korytchenko, Krivosheyev Pavel, Dubinin Dmytro, et al. "EXPERIMENTAL RESEARCH INTO THE INFLUENCE OF TWOSPARK IGNITION ON THE DEFLAGRATION TO DETONATION TRANSITION PROCESS IN A DETONATION TUBE." Eastern-European Journal of Enterprise Technologies 4, no. 5 (100) (2019): 26–31. https://doi.org/10.15587/1729-4061.2019.175333.

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The paper reports a study into the initiation of detonation in pulse detonation engines. The chosen direction to resolve this issue is the use of detonation tubes with multifocal ignition. We applied two spark discharges as a source of ignition, which ignited synchronously. The spark discharges were ignited at a distance, which provided for the intensive gas-dynamic interaction between the discharges. The interaction implied a collision between shock waves generated by the spark discharges. As a result, the growth in temperature of gas was ensured in the region between spark intervals, due to

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20

Peng, Bangfa, Nan Jiang, Kefeng Shang, Na Lu, Jie Li, and Yan Wu. "Characteristics of three-electrode pulsed surface dielectric barrier discharge: streamer-to-spark transition and hydrodynamic expansion." Journal of Physics D: Applied Physics 55, no. 26 (2022): 265202. http://dx.doi.org/10.1088/1361-6463/ac5a20.

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Abstract Streamer-to-spark transition and hydrodynamic expansion in a three-electrode pulsed surface dielectric barrier discharge are studied under atmospheric-pressure air. Three sequential discharge processes of the primary streamer, transitional streamer and spark phase during a single pulse are observed from the time-resolved plasma morphologies. The primary streamer and transitional streamer phases, with a rising voltage and low current, followed by a spark phase with a rapidly falling pulse and ascending current are characterized. Images of the discharge development show that the transit

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21

Różowicz, Sebastian, and Szymon Tofil. "The influence of impurities on the operation of selected fuel ignition systems in combustion engines." Archives of Electrical Engineering 65, no. 2 (2016): 349–60. http://dx.doi.org/10.1515/aee-2016-0026.

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Abstract The paper attempts to determine the impact of fuel impurities on the spark discharge energy and the wear of the spark plug electrode. Spark plugs were analyzed in two typical configurations of the ignition system. A number of tests were conducted to determine the wear of the spark plug electrode exposed to different types of impurities. The spark discharge energy for new and worn spark plugs was determined through calculation.

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22

Syssoev V.S., Kuznetsov Yu. A., Naumova M. Yu., et al. "Stand for research of radio emission of a long electric spark." Technical Physics Letters 48, no. 4 (2022): 52. http://dx.doi.org/10.21883/tpl.2022.04.53173.19070.

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On the created stand, in laboratory conditions, various phases of discharge development characteristic of lightning were simulated using an electric spark in a long air gap. With the help of special radio equipment, the radio emission of a long electric spark was investigated. It is found that at the stages of development of a spark discharge, radio emission is recorded in a long interval up to at least a frequency of 1.4 GHz. Data on radio emission in this range are of great practical importance for such areas as radio communication (during thunderstorm activity), radar, lightning direction f

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23

Yang, Zhenyi, Xiao Yu, Hua Zhu, David S.-K. Ting, and Ming Zheng. "Effect of spark discharge energy scheduling on ignition under quiescent and flow conditions." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 12 (2020): 2878–91. http://dx.doi.org/10.1177/0954407020915976.

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The enhancement of the breakdown power during the spark discharge process has been proved to be beneficial for the flame kernel formation process under lean/diluted conditions. Such a strategy is realized by using a conventional transistor coil ignition system with an add-on capacitance in parallel to the spark plug gap in this paper. In practical application, the use of different ceramic material other than aluminum oxide can change the parasitic capacitance of the spark plug, achieving similar effect in terms of rescheduling the discharge energy released during the breakdown phase. Detailed

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24

Bogatov N. A., Syssoev V.S., Sukharevsky D. I., and Naumova M. Yu. "Microwave diagnostics of electrical discharges in an artificial cloud of charged water drops." Technical Physics 92, no. 3 (2022): 306. http://dx.doi.org/10.21883/tp.2022.03.53260.284-21.

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The microwave diagnostics of discharges occurring in an artificial cloud of charged water droplets created in an open air simulating the environment of thunderclouds is implemented. An artificial cloud with a droplet size of about 1 microns is opaque in the visible range, so intra-cloud discharges are not available for investigation by traditional methods in the spark discharge physics based on the registration of visible discharge radiation. Microwaves pass through such a cloud without noticeable attenuation, they interact only with the plasma of discharges occurring in the cloud. The probing

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25

Yeakub Ali, Mohammad, Abdus Sabur, and Md Abdul Maleque. "Micro Electro Discharge Machining of Nonconductive Ceramic: The Issue of Spalling." International Journal of Engineering & Technology 7, no. 3.24 (2018): 32. http://dx.doi.org/10.14419/ijet.v7i3.24.17297.

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Nonconductive ceramic materials are used in many engineering applications such as car brake, turbine blade, and hip-bone replacement because of its high dimensional accuracy, corrosion and wear resistant, and biocompatibility. These materials are usually processed with diamond grinding and limited laser applications such as cutting, drilling and scribing. Specific shapes and profiles are still difficult and costly to machine using these processes. Electrical discharge machining (EDM), extensively used for various shapes and profiles on conductive materials having minimum electrical conductivit

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26

Rapp, Vi H., Anthony DeFilippo, Samveg Saxena, et al. "Extending Lean Operating Limit and Reducing Emissions of Methane Spark-Ignited Engines Using a Microwave-Assisted Spark Plug." Journal of Combustion 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/927081.

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A microwave-assisted spark plug was used to extend the lean operating limit (lean limit) and reduce emissions of an engine burning methane-air. In-cylinder pressure data were collected at normalized air-fuel ratios ofλ=1.46,λ=1.51,λ=1.57,λ=1.68, andλ=1.75. For eachλ, microwave energy (power supplied to the magnetron per engine cycle) was varied from 0 mJ (spark discharge alone) to 1600 mJ. At lean conditions, the results showed adding microwave energy to a standard spark plug discharge increased the number of complete combustion cycles, improving engine stability as compared to spark-only oper

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27

Goto, Hiromasa, Kyoka Komaba, Kazuki Yanagida, and Aoi Tokutake. "Spark discharge-initiated radical polymerization." Next Materials 6 (January 2025): 100326. http://dx.doi.org/10.1016/j.nxmate.2024.100326.

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28

Afanas’ev, S. A., V. G. Brovkin, and Yu F. Kolesnichenko. "Laser spark initiated microwave discharge." Technical Physics Letters 36, no. 7 (2010): 672–74. http://dx.doi.org/10.1134/s1063785010070266.

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29

Pincik, Emil, Rudolf Hajossy, and Robert Brunner. "Aerodynamic model of spark discharge." Journal of the Chinese Advanced Materials Society 1, no. 2 (2013): 111–20. http://dx.doi.org/10.1080/22243682.2013.804641.

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30

Schwyn, S., E. Garwin, and A. Schmidt-Ott. "Aerosol generation by spark discharge." Journal of Aerosol Science 19, no. 5 (1988): 639–42. http://dx.doi.org/10.1016/0021-8502(88)90215-7.

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31

Majidi, Vahid, and David M. Coleman. "Magnetic Confinement and Control of Trajectories of Discharge Species in Atmospheric-Pressure Analytical Spark Discharges." Applied Spectroscopy 41, no. 2 (1987): 200–207. http://dx.doi.org/10.1366/000370287774986859.

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A series of experiments, designed to help characterize the behavior of an analytical spark discharge in an external pulsed magnetic field, is described. Results include controlled formation and deformation of a spark's post-discharge torus utilizing different magnetic field configurations. One manifestation of this research was discovery of a new filamentary structure which extends from the spark conducting channel to the magnet pole face(s). These features were investigated via their refracted light (Schlieren) and spectroscopic (time/space/wavelength-resolved) properties. Practical ramificat

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32

You, Meng-Ran, Shu-Lin Liu, and Dan-Dan Xu. "Design and Implementation of a Spark Pulse Power Control Device for Intrinsically Safe Circuits." Journal of Nanoelectronics and Optoelectronics 19, no. 11 (2024): 1148–55. https://doi.org/10.1166/jno.2024.3674.

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This paper presents the study and design of a control device capable of adjusting and monitoring spark pulse power and pulse width time. This device aids in the experimental analysis of spark discharge ignition mechanisms and explores the relationship between the spark power, discharge time, and energy. The device comprises two stages. The first stage employed a forward converter as the main topology. By using a controller to set an adjustable reference voltage and incorporating current-mode feedback control, it achieves a wide range of adjustable output voltage, providing the necessary voltag

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Sebih, Lyes, Emile Carbone, and Ahmad Hamdan. "(Invited) Nanosecond Discharges in Air with Presence of Solution Droplet: Fundamentals and Applications to Nanomaterial Synthesis." ECS Meeting Abstracts MA2025-01, no. 22 (2025): 1382. https://doi.org/10.1149/ma2025-01221382mtgabs.

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Interactions between pulsed electrical discharges and liquid dielectric materials have emerged as a growing research field with interests in fundamental discharge physics and subsequent applications. Herein, we present on the dynamics of nanosecond discharges produced under different conditions of applied voltages (V a) in air in the presence of a water droplet with various electrical conductivities (EC). The discharges are characterized optically, by employing time-resolved ICCD imaging and optical emission spectroscopy, and electrically, by acquiring the current–voltage waveforms for every d

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VIPIN, CHOPADE, PISE DHANANJAY, and SHINDE PANDIT. "STATISTICAL ANALYSIS OF ELECTROCHEMICAL DISCHARGE MACHINING FOR SODA LIME GLASS." JournalNX - a Multidisciplinary Peer Reviewed Journal 3, no. 8 (2017): 14–19. https://doi.org/10.5281/zenodo.1420769.

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Electro chemical discharge machining (ECDM) is a hybrid process which combines the features of electro chemical machining (ECM) and electro discharge machining (EDM).The need for micromachining of advanced engineering materials started increase in demand in various sectors like nuclear, aerospace and medical industries. Electrochemical discharge machining (ECDM) technique is that involves high-temperature melting and accelerated chemical etching under the high electrical energy discharged and has potential to machine electrically non-conductive materials such as glass, quartz, composite, ceram

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35

Syssoev, V. S., E. V. Basov, A. I. Orlov, et al. "Experimental simulation of the generation of microwave radiation during the interaction of a lightning discharge with an aircraft." Safety and Reliability of Power Industry 17, no. 1 (2024): 49–57. http://dx.doi.org/10.24223/1999-5555-2024-17-1-49-57.

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On a specialized testing installation — a high-voltage Marx generator, which allows the formation of a spark discharge up to 20 meters long, the process of the impact of lightning radio emission in the microwave range on an aircraft (AC) is simulated. A metal AC model made on a scale of 1:50 was placed in a 9 m long rod-plane spark gap. A positive voltage pulse was applied to the high-voltage electrode from the generator (front 100 μsec, duration 7500 μsec). The generated spark discharge passed through the AC model. It was found that when the spark channel passes through the body of the model,

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36

Liu, Changhong, Xingxin Yang, Shaohu Peng, Yongjun Zhang, Lingxi Peng, and Ray Y. Zhong. "Spark Analysis Based on the CNN-GRU Model for WEDM Process." Micromachines 12, no. 6 (2021): 702. http://dx.doi.org/10.3390/mi12060702.

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Wire electrical discharge machining (WEDM), widely used to fabricate micro and precision parts in manufacturing industry, is a nontraditional machining method using discharge energy which is transformed into thermal energy to efficiently remove materials. A great amount of research has been conducted based on pulse characteristics. However, the spark image-based approach has little research reported. This paper proposes a discharge spark image-based approach. A model is introduced to predict the discharge status using spark image features through a synchronous high-speed image and waveform acq

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37

Li, Xin Guang, Sheng Jun Zhong, Chun Li Ren, Lin Lu, Yan Cheng, and Xiao Mei Feng. "Experiment and Analysis of Large Energy Spark Discharge." Advanced Materials Research 508 (April 2012): 106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.508.106.

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By using high-voltage breakdown, low-voltage continued arc principle in the 20L ball-type dust explosive device, 8000J level of spark discharge energy was successfully achieved, measuring results of chemical ignition were compared with spark ignition. Using oscillometric method, integral measurement of spark energy was done, and the results provide effective guidance for related experiments.

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38

Yang, Lizhao, Xiaodong Fang, and Libing You. "Numerical Analysis of Corona Pre-Ionization for High-Power Discharge-Pumped XeCl* Excimer Lasers." Journal of Nanoelectronics and Optoelectronics 17, no. 3 (2022): 436–45. http://dx.doi.org/10.1166/jno.2022.3219.

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The working gas of discharge-pumped excimer lasers is generally a mixture of rare gases and monohalide. Typically, the working gas is preconized to generate reproducible uniform glow discharge. In high-power (more than 100 W) excimer lasers, this pre-ionization is achieved through spark discharge in the discharge chamber. In this study, a high-power discharge-pumped XeCl* excimer laser with corona preionisation was designed to investigate the feasibility of applying corona preionisation in high-power excimer lasers as well as analyse the correlation of corona discharges characteristics with la

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Różowicz, Sebastian. "Use of the mathematical model of the ignition system to analyze the spark discharge, including the destruction of spark plug electrodes." Open Physics 16, no. 1 (2018): 57–62. http://dx.doi.org/10.1515/phys-2018-0011.

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Abstract The paper presents the results of analytical and experimental studies concerning the influence of different kinds of fuel additives on the quality of the spark discharge for different configurations of the ignition system. The wear of the spark plug electrode and the value of spark discharge were determined for various impurities and configurations of the air-fuel mixture.

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Ekici, O., O. A. Ezekoye, M. J. Hall, and R. D. Matthews. "Thermal and Flow Fields Modeling of Fast Spark Discharges in Air." Journal of Fluids Engineering 129, no. 1 (2006): 55–65. http://dx.doi.org/10.1115/1.2375130.

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In this study, a two-dimensional axisymmetric computational model of spark discharge in air is presented to provide a better understanding of the dynamics of the process. Better understanding of the modeling issues in spark discharge processes is an important issue for the automotive spark plug community. In this work we investigate the evolution of the shock front, temperature, pressure, density, geometry, and flow history of a plasma kernel using various assumptions that are typically used in spark discharge simulations. A continuum, inviscid, heat conducting, single fluid description of the

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Zhang, L. C., S. D. Ding, Y. L. Pei, et al. "Experimental study of multi-bubble hydraulic efficiency of spark-generated bubbles." AIP Advances 12, no. 9 (2022): 095215. http://dx.doi.org/10.1063/5.0100591.

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We investigated the hydraulic efficiency of spark-generated bubbles under conditions of different discharge polarities and different electrode numbers. A positive polarity discharge can generate a larger spark-induced bubble than a negative polarity discharge generated using the same electrical and electrode parameters. The hydraulic efficiency of both the positive and negative polarity discharges decreases with the increasing number of electrodes. Increasing the number of electrodes leads to faster energy injection times and higher average powers. We found that the hydraulic efficiency increa

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Amini, Maryam, Milad Rasouli, Mahmood Ghoranneviss, and Kostya (Ken) Ostrikov. "(Digital Presentation) Water Treatment through the Arc and Pulsed Spark Discharge." ECS Meeting Abstracts MA2022-01, no. 44 (2022): 2466. http://dx.doi.org/10.1149/ma2022-01442466mtgabs.

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Water deterioration and depletion are accompanied by population growth and fast urbanization, posing major environmental problems. The prevalence of water-borne infections remains high, making it critical to discover effective ways of disinfecting water thoroughly. The main methods for inactivating a wide spectrum of harmful bacteria are chemical, physical, electrochemical, and radical. Conventional decontamination methods not only fail to completely disinfect water but also have several drawbacks, including the generation of disinfection byproducts; the complexity of disinfection reactor desi

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Dekhtyar’, V. A., A. E. Dubinov, and G. N. Kolesov. "Observation of a Plasma Analogue of the Mpemba Effect." Химия высоких энергий 57, no. 4 (2023): 255–59. http://dx.doi.org/10.31857/s0023119323040071.

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The processes of freezing of water droplets sitting on a substrate after exposure to nanosecond spark discharges have been experimentally studied. It has been found that the droplets subjected to spark discharge treatment freeze much earlier than those unexposed to discharges. The analogy of the observed processes with the well-known Mpemba effect is noted. A qualitative explanation is given for the observed effect: rapid freezing is due to hydrated electrons, which are formed upon contact of water with plasma and play the roleof crystallization centers

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Lungu, Cristian Victor, and Bogdan Hnatiuc. "Volume characterisation of the electrical discharge." Technium: Romanian Journal of Applied Sciences and Technology 2, no. 1 (2020): 73–78. http://dx.doi.org/10.47577/technium.v2i1.44.

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In this paper, theoretical and practical study of gliding arc discharges is presented considering the discharge itself. The characteristics of the gliding arc are studied at different flow rate values. For this study case instrumental air was used in order to elongate the spark thus obtaining the gliding arc. The comparison took into consideration linear approximations of the discharge compared to the real phenomena. 

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Liu, Shulin, and Yongxiu Zhao. "Research on Short-Circuit Discharge Characteristics of Capacitive Circuits Based on Safety Spark Test Apparatus." Mathematical Problems in Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/516925.

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Based on the safety spark test apparatus, the short-circuit spark discharge (SCSD) characteristics of the simple capacitive circuit and switching converter are studied. It is pointed out that their SCSD process can be divided into four stages, that is, dielectric-breakdown stage, spark-generated stage, spark-maintenance stage, and spark-extinguish stage; moreover, there is different equivalent spark resistance in each stage. For the simple capacitive circuit, its spark resistance is larger and maintaining voltage is almost unchanged in the spark-maintenance stage. For the switching converter,

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Tang, Qin, Tao Qiu, Ping Ni, Dajun Zhai, and Jun Shen. "Soft Sparking Discharge Mechanism of Micro-Arc Oxidation Occurring on Titanium Alloys in Different Electrolytes." Coatings 12, no. 8 (2022): 1191. http://dx.doi.org/10.3390/coatings12081191.

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Soft sparking during micro-arc oxidation can form a ceramic coating with high hardness and high bond strength on titanium alloy while avoiding the continuous strong micro-arc that can damage the substrate properties and the integrity of the coating. Existing studies have reported that the soft spark discharge is significantly influenced by the electrolyte anions, and the detailed mechanism of its influence remains unclear. Therefore, we considered four monolithic electrolytes, namely Na2B4O7, NaF, Na3PO4, and Na2SiO3, for the bipolar pulsed micro-arc oxidation (MAO) treatment of the Ti6Al4V al

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HUNICZ, Jacek, Michał GĘCA, Paweł KORDOS, and Alejandro MEDINA. "Effects of spark assist on HCCI combustion." Combustion Engines 161, no. 2 (2015): 73–77. http://dx.doi.org/10.19206/ce-116894.

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HCCI (homogeneous charge compression ignition) combustion is initiated by compression temperature and is independent of spark discharge. However, spark discharge can be applied under certain conditions to achieve hybrid combustion, where combustion by flame propagation is followed by auto-ignition of the unburned mixture. Spark assist can be applied to improve combustion stability at low loads or to reduce pressure rise rates under high load regime. In the current study variable spark ignition timing was applied for stoichiometric HCCI combustion, achieved using negative valve overlap techniqu

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Sayama, Shogo, Masao Kinoshita, Yoshiyuki Mandokoro, and Takayuki Fuyuto. "Spark ignition and early flame development of lean mixtures under high-velocity flow conditions: An experimental study." International Journal of Engine Research 20, no. 2 (2018): 236–46. http://dx.doi.org/10.1177/1468087417748517.

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This study set out to experimentally investigate spark ignition and the subsequent early flame development of lean air–fuel mixtures of A/ F = 20–30 under high-velocity flow conditions using a uniquely designed swirl chamber. The swirl chamber realizes a high-velocity flow of 65 m/s at the spark plug gap, as well as internal temperature and pressure histories that are equivalent to those of spark-ignition engines, being equipped with an optically accessible engine. The designed swirl chamber clearly captures the characteristic behavior of the spark channels and flames in the vicinity of the sp

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Koide, Masayo, Matthew A. Nystoriak, Gayathri Krishnamoorthy, et al. "Reduced Ca2+ Spark Activity after Subarachnoid Hemorrhage Disables BK Channel Control of Cerebral Artery Tone." Journal of Cerebral Blood Flow & Metabolism 31, no. 1 (2010): 3–16. http://dx.doi.org/10.1038/jcbfm.2010.143.

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Intracellular Ca2+ release events (‘Ca2+ sparks’) and transient activation of large-conductance Ca2+-activated potassium (BK) channels represent an important vasodilator pathway in the cerebral vasculature. Considering the frequent occurrence of cerebral artery constriction after subarachnoid hemorrhage (SAH), our objective was to determine whether Ca2+ spark and BK channel activity were reduced in cerebral artery myocytes from SAH model rabbits. Using laser scanning confocal microscopy, we observed ∼50% reduction in Ca2+ spark activity, reflecting a decrease in the number of functional Ca2+ s

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Chernoglazov, Alexander, Alexander Philippov, and Andrey Timokhin. "Coherence of Multidimensional Pair Production Discharges in Polar Caps of Pulsars." Astrophysical Journal Letters 974, no. 2 (2024): L32. http://dx.doi.org/10.3847/2041-8213/ad7e24.

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Abstract We report on the first self-consistent multidimensional particle-in-cell numerical simulations of nonhomogeneous pair discharges in polar caps of rotation-powered pulsars. By introducing strong inhomogeneities in the initial plasma distribution in our simulations, we analyze the degree of self-consistently emerging coherence of discharges across magnetic field lines. In 2D, we study discharge evolution for a wide range of physical parameters and boundary conditions corresponding to both the absent and free escape of charged particles from the surface of a neutron star. We also present

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