空気-水の二相系密閉容器内の水中アークによる圧力上昇
空気-水の二相系密閉容器内の水中アークによる圧力上昇
カテゴリ: 論文誌(論文単位)
グループ名: 【B】電力・エネルギー部門
発行日: 2012/12/01
タイトル(英語): Pressure Rise due to an Underwater Arc in a Closed Vessel Containing Air and Water
著者名: 田所 兼((一財)電力中央研究所 電力技術研究所),神足 将司((一財)電力中央研究所 電力技術研究所),大高 聡也((一財)電力中央研究所 電力技術研究所),天川 正士((一財)電力中央研究所 電力技術研究所)
著者名(英語): Tomo Tadokoro (Electric Power Engineering Research Lab. Central Research Institute of Electric Power Industry (CRIEPI)), Masashi Kotari (Electric Power Engineering Research Lab. Central Research Institute of Electric Power Industry (CRIEPI)), Toshiya Ohtaka (Electric Power Engineering Research Lab. Central Research Institute of Electric Power Industry (CRIEPI)), Tadashi Amakawa (Electric Power Engineering Research Lab. Central Research Institute of Electric Power Industry (CRIEPI))
キーワード: 圧力上昇,水中,アーク,気泡,凝縮,短絡故障 pressure rise,underwater,arc,bubble,condensation,short-circuit fault
要約(英語): When a fault arc occurs in oil-filled electric equipment such as transformers in transmission and distribution systems, it generates a flammable gas and a dynamic pressure rise that may trigger an explosion. This paper describes a fundamental study concerning pressure rise due to an underwater arc in a closed vessel containing of air and water prior to examination of the arc phenomena in the electrical insulating oil. In this study, the pressure rises in both air and water are measured under experimental conditions of an arc current ranging from 0.5 to 6.7kA and an arc duration of 10 or 20ms. Experimental results show that the behavior of a bubble generated by the underwater arc affects the pressure rise in the air and the water as low-frequency pressure oscillation comparatively. Additionally, in water, two pressure-peaks are observed as high-frequency pulses. The first pressure peak is observed at almost the same time as the arc is ignited, while the second is produced when the bubble collapses due to vapor condensation.
本誌: 電気学会論文誌B(電力・エネルギー部門誌) Vol.132 No.12 (2012)
本誌掲載ページ: 960-968 p
原稿種別: 論文/日本語
電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/132/12/132_960/_article/-char/ja/
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