Influence of molecular structure on propagation of positive streamer discharge in dielectric liquids
| Autor: | Tadashi Naito, Yosuke Sakai, Shimizu Rumiko, Yoshitaka Nakao, Noriaki Hamano, Yoshitake Nakagami, Hiroaki Tagashira |
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| Rok vydání: | 2004 |
| Předmět: |
chemistry.chemical_classification
Materials science Double bond Analytical chemistry Energy Engineering and Power Technology Dielectric Impulse (physics) Triple bond Streamer discharge Molecular physics Nuclear magnetic resonance chemistry Schlieren Molecule Electrical and Electronic Engineering Bond energy |
| Zdroj: | Electrical Engineering in Japan. 149:15-21 |
| ISSN: | 1520-6416 0424-7760 |
| Popis: | In this paper, streamer discharges in dielectric liquids which have various molecular structures, such as a double bond or a triple bond in the molecular formula, are observed in detail for positive point polarity under the application of an impulse voltage to the point electrode. As test liquids, four straight-chain hydrocarbon liquids—n-hexane, n-heptane, n-octane, and n-decane—are selected and in addition the influence of a double or triple bond included in their molecular formula on the propagation of positive streamers is investigated in detail by simultaneously using a high-speed schlieren method and an LED current measurement system. Some differences in the mean propagation velocity and the propagation shape of positive streamers are evident. Their shape is mainly filamentary in test liquids including a double or triple bond. Also, positive streamer propagation is promoted in these liquids. It is thought that this is due to the effect of π bonds which have smaller bond energies than σ bonds. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 149(1): 15–21, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10366 |
| Databáze: | OpenAIRE |
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