横風吹付時におけるアークの軸方向エンタルピーフローに及ぼす陰極近傍アークの圧力勾配の寄与

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: 2019/05/01

タイトル(英語): Contribution of Axial Arc Pressure Gradient Near Cathode on Enthalpy Flow of Arc to Axial Direction with Lateral Gas

著者名: 真栄田　義史（東京都市大学 工学部 電気電子工学科），岩尾　徹（東京都市大学 工学部 電気電子工学科）

著者名(英語): Yoshifumi Maeda (Department of Electrical and Electronic Engineering, Faculty of Engineering, Tokyo City University), Toru Iwao (Department of Electrical and Electronic Engineering, Faculty of Engineering, Tokyo City University)

キーワード: 3次元電磁熱流体シミュレーション，横風流速，アーク偏向，エンタルピーフロー，流速　　three-dimensional electromagnetic thermal fluid simulation，lateral gas flow velocity，arc deflection，enthalpy flow，flow velocity

要約(英語): The arc affected by the lateral gas is deflected to leeward, and the problem of heat transfer decrement occurs in the base metal at the arc welding. The elucidation of arc deflection is necessary with the lateral gas. It has been researched that the heat transfer decreases with increasing the arc deflection length. However, the measurement of arc pressure is difficult because the plasma jet affected by lateral gas flows to leeward. For this reason, the arc stiffness has not been elucidated at the only experiment with lateral gas. The understanding of correlation between the plasma jet and heat transport affected by the convective heat transfer is necessary using 3-D numerical analysis for the elucidation of the arc stiffness. In this paper, the contribution of axial arc pressure gradient near cathode on the enthalpy flow of arc to axial direction with the lateral gas was elucidated. As a result, the mean convective force in arc periphery part increased a bit and the axial arc pressure gradient did not change in the case of the low lateral gas flow velocity. The total heat transfer derived from the enthalpy flow to axial direction did not change because the axial arc pressure gradient was higher than the convective force of lateral gas. In contrast, the mean convective force in arc periphery part increased and the axial arc pressure gradient decreased in the case of the high lateral gas flow velocity. The total heat transfer derived from the enthalpy flow to axial direction decreased because the plasma jet affected by the convective force of lateral gas move to leeward direction. Therefore, the axial arc pressure gradient plays an important role for the prevention of arc deflection.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.139 No.5 （2019） 特集：雷・熱プラズマ・アーク技術の最新動向

本誌掲載ページ: 309-315 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/139/5/139_309/_article/-char/ja/