Experimental study of acoustical characteristics of underwater high voltage electrical discharge
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| Project ID: | GA18-12386S | | Provider: | Czech Science Foundation | | Period: | Jan 01, 2018 - Dec 31, 2020 | | Principal Investigator: | Ing. Vitaliy Stelmashuk, Ph.D. | | Co-investigators | P. Hoffer, K. Koláček, J. Štraus |
Aims of the project: The aim of the proposed project is to develop fundamental understanding of the hydrodynamic phenomena connected with electrical discharges in liquids and to study their acoustical characteristics. The basic task of the project is to investigate a qualitative picture of transformation of the electrical energy to the mechanical one. Theoretical models of a discharge as a hydrodynamic phenomenon will be examined and the results of these calculations will be compared with experimental data. Further on, an experimental study of the focused shock wave generation will be performed. A detailed comparison of three shock wave generators with different electrode configurations will be done. It is supposed that based on this comparison the shock wave generator with the best efficiency will be determined and its parameters will be optimized. A new experimental setup will be used for the determination of the most important parameter for practical applications – the efficiency of transformation of the electrical energy to the mechanical one. These results enable us to determine the optimal parameters for generation of focused shock waves. |
Results: | Frolov O., Stelmashuk V., Koláček K., Prukner V., Tuholukov A., Hoffer P., Štraus J., Schmidt J., Jirásek V., Oliva E.: Pressure in underwater spark discharge initiated with the help of bubble injection and its evaluation based on H-alpha line broadening. Journal of Physics D-Applied Physics 56 [28] (2023) č. článku 285201. [ Abstract ] [ Link ] |
Hoffer P., Niedoba K., Jirásek V., Prukner V., Šimek M.: Streamer-Based Discharge on Water–Air Interface as a Source of Plasma-Activated Water: Conceptual Design and Basic Performance. Plasma Chemistry and Plasma Processing 43 [6] (2023) 1531-1547. [ Abstract ] [ Link ] |
Stelmashuk V., Tuholukov A., Krasik Y. E., Hoffer P., Schmidt J., Štraus J., Frolov O.: Study of underwater discharge initiated by a high-voltage preliminary pulse produced by a Marx generator. Journal of Applied Physics 133 [3] (2023) č. článku 033301. [ Abstract ] [ Link ] |
Stelmashuk V., Schmidt J.: An empirical resistance equation for the modelling of corona discharge in saline water. Plasma Sources Science & Technology 31 [1] (2022) č. článku 015011. [ Abstract ] [ Link ] |
Stelmashuk V., Prukner V., Koláček K., Tuholukov A., Hoffer P., Štraus J., Frolov O., Jirásek V.: Optical Emission Spectroscopy of Underwater Spark Generated by Pulse High-Voltage Discharge with Gas Bubble Assistant. Processes 10 [8] (2022) č. článku 1474. E. [ Abstract ] [ Link ] |
Schmidt J., Koláček K., Frolov O., Štraus J., Hoffer P., Stelmashuk V., Tuholukov A., Jiříček P., Houdková J.: Long-term changes in Al thin-film extreme ultraviolet filters. Applied Optics 60 [28] (2021) 8766-8773. [ Abstract ] [ Link ] |
Stelmashuk V., Hoffer P., Koláček K., Štraus J.: Experimental Study of Spark Channel Expansion in Water. IEEE Transactions on Plasma Science 48 [2] (2020) 491-499, č. článku 89612. [ Abstract ] [ Link ] |
Stelmashuk V.: New approach to an underwater discharge simulation using elliptic coordinates. AIP Advances 10 [1] (2020) č. článku 015102. [ Abstract ] [ Link ] |
Koláček K., Stelmashuk V., Tuholukov A., Hoffer P., Schmidt J., Štraus J., Frolov O., Oliva E.: Modelling of time development of cylindrical underwater spark channel in compressible viscous liquid. Journal of Physics D-Applied Physics 53 [50] (2020) č. článku 505201. [ Abstract ] [ Link ] |
Stelmashuk V., Hoffer P., Štraus J., Koláček K.: Numerical simulation of a spark channel expansion in water and its comparison with an experimental result. IEEE Pulsed Power & Plasma Science. Orlando: The IEEE Nuclear and Plasma Sciences Society, 2019, 2019-June (2019), č. článku 9009660. ISBN 9781538679692. ISSN 2158-4915. [ Abstract ] [ Link ]
[International Conference on Pulsed Power. Orlando (US), 23.06.2019-29.06.2019] |
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