Effect of Voltage Rise Rate on Streamer Branching and Shock Wave Characteristics in Supercritical Carbon Dioxide
| Autor: | Takashi Sakugawa, Hidenori Akiyama, Tomoyuki Fujishima, Miyuki Ota, Takahiko Yamashita, Tomohiro Furusato, Sunao Katsuki |
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| Rok vydání: | 2016 |
| Předmět: |
Shock wave
Nuclear and High Energy Physics Materials science Population 01 natural sciences 010305 fluids & plasmas symbols.namesake chemistry.chemical_compound Electrostrictive force 0103 physical sciences Shadowgraph supercritical (SC) carbon dioxide education nanosecond pulsed discharge 010302 applied physics education.field_of_study Supercritical carbon dioxide business.industry Electrical engineering shock waves Condensed Matter Physics shadowgraph method Mach number chemistry Electrode Carbon dioxide symbols Atomic physics business positive streamer Voltage |
| Zdroj: | IEEE Transactions on Plasma Science. 44:3189-3195 |
| ISSN: | 1939-9375 0093-3813 |
| DOI: | 10.1109/tps.2016.2607225 |
| Popis: | This paper reports on the dependence of voltage rise rate on positive streamer branching and shock waves in supercritical carbon dioxide. Voltages with rise rates of 0.21 and 4.5 kV/ns were applied to a needle-To-plane electrode. Prebreakdown phenomena involving streamer growth and shock wave propagation were observed by means of a shadowgraph method. The results show that the spread angle of the streamer at the needle tip under 4.5 kV/ns was nearly twice as large as that under 0.21 kV/ns. The discharge may initiate without density reduction due to electrostrictive force. While shock wave Mach number was little affected by the voltage rise rate, it increased by increasing the negative voltage peak. Consequently, the velocity of shock wave is presumed to be influenced by the population of the vibrational state of carbon dioxide. IEEE Transactions on Plasma Science, 44(12), pp.3189-3195; 2016 |
| Databáze: | OpenAIRE |
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