Numerical Simulation on Quenching Process of Carbon Dioxide Arcs with Hydrogen Gas Inclusion in Different Nozzle Shapes

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: 2013/11/01

タイトル(英語): Numerical Simulation on Quenching Process of Carbon Dioxide Arcs with Hydrogen Gas Inclusion in Different Nozzle Shapes

著者名: Yasunori Tanaka (Division of Electrical Engineering and Computer Science, Kanazawa University), Xiaoli Song (Division of Electrical Engineering and Computer Science, Kanazawa University), Yoshihiko Uesugi (Division of Electrical Engineering and Computer S

著者名(英語): Yasunori Tanaka (Division of Electrical Engineering and Computer Science, Kanazawa University), Xiaoli Song (Division of Electrical Engineering and Computer Science, Kanazawa University), Yoshihiko Uesugi (Division of Electrical Engineering and Computer Science, Kanazawa University), Shuhei Kaneko (Tokyo Electric Power Co.), Shigemitsu Okabe (Tokyo Electric Power Co.)

キーワード: circuit breaker，thermal interruption，arcs，carbon dioxide CO2，hydrogen H2，nozzle shape

要約(英語): This paper describes the influences of different nozzle shapes on the thermal interruption capability of a CO2 model circuit breaker with H2 inclusion using an fluid dynamic simulation under the assumption of a local thermodynamic equilibrium condition. Six nozzle shape spaces were studied in order to find the effects respectively from differences in the nozzle convergence angle and nozzle throat length. It is proved that the temperature and gas flow velocity around the nozzle inlet position are crucial for the thermal interruption of CO2 arc with H2 gas. Power balance in the whole arc plasma region was also studied to know the dominant power loss during the thermal interruption processes. As a result, convection loss may determine the thermal interruption capability of CO2+H2 arcs, which is also related with a local maximum gas flow velocity on the center axis in the nozzle throat around current zero.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.133 No.11 （2013） 特集：開閉保護技術

本誌掲載ページ: 895-902 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/133/11/133_895/_article/-char/ja/