Numerical Investigation of the Swirl Gas Angle Dependence on Evaporation of Hafnium Cathode in a Plasma Cutting Arc

カテゴリ: 全国大会

論文No: 1-220

グループ名: 【全国大会】平成23年電気学会全国大会論文集

発行日: 2011/03/05

タイトル(英語): Numerical Investigation of the Swirl Gas Angle Dependence on Evaporation of Hafnium Cathode in a Plasma Cutting Arc

著者名: グエンフィ ロン(金沢大学),田中 康規(金沢大学),上杉 喜彦(金沢大学),山口 義博(コマツ産機)

著者名(英語): Phi Long Nguyen (Kanazawa University),Yasunori Tanaka(Kanazawa University),Yoshihiko Uesugi(Kanazawa University),Yoshihiro Yamaguchi(Komatsu Industries Corp.)

キーワード: プラズマ切断機|熱流体解析|アークプラズマ|電子放出|電極損耗

要約(日本語): The effect of swirl gas angle on plasma cutting arc was investigated using a developed two-dimensional thermofluid model. Amount of hafnium (Hf) cathode evaporation was predicted considering the evaporation flux estimated using the saturation vapor pressure and the re-deposition flux. The results showed that the large swirl gas angle caused a high temperature plasma area in front of the cathode surface shrunken in radial direction and the flow patterns changed to opposite direction in front of the cathode at large swirl gas angle. The net evaporated mass flux from the Hf cathode was enhanced with increasing swirl gas angle.

原稿種別: 日本語

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