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Optical Emission Spectroscopy of Underwater Spark Generated by Pulse High-Voltage Discharge with Gas Bubble Assistant
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SYSNO ASEP 0565856 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Optical Emission Spectroscopy of Underwater Spark Generated by Pulse High-Voltage Discharge with Gas Bubble Assistant Author(s) Stelmashuk, Vitaliy (UFP-V) RID
Prukner, Václav (UFP-V) RID, ORCID
Koláček, Karel (UFP-V) RID
Tuholukov, Andrii (UFP-V)
Hoffer, Petr (UFP-V) RID
Štraus, Jaroslav (UFP-V) RID
Frolov, Oleksandr (UFP-V) RID
Jirásek, Vít (UFP-V)Number of authors 8 Article number 1474 Source Title Processes. - : MDPI
Roč. 10, č. 8 (2022)Number of pages 8 s. Language eng - English Country CH - Switzerland Keywords black body radiation ; optical emission spectroscopy ; shockwave ; underwater spark ; water Subject RIV CI - Industrial Chemistry, Chemical Engineering OECD category Chemical process engineering R&D Projects GA18-12386S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000845774500001 EID SCOPUS 85137577897 DOI 10.3390/pr10081474 Annotation 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 shockwave amplitude generated by discharge strongly depend on the size of the gas bubble in the moment of the discharge initiation. It was found that the plasma in the underwater spark channel does not correspond to a source of black-body radiation. This study can be also very useful for understanding the difference between discharges produced directly in a liquid and discharges produced in gas/vapor bubbles surrounded by a liquid. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2023 Electronic address https://www.mdpi.com/2227-9717/10/8/1474
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