非平衡ディスク形MHD発電機の超音速ノズル内の全圧損失と等エントロピー効率の関係

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: 2021/05/01

タイトル(英語): Relation between Total Pressure Loss in Supersonic Nozzle and Isentropic Efficiency of Nonequilibrium Disk-shaped MHD Generator

著者名: 坂本　裕基（筑波大学大学院システム情報工学研究科），佐々木　亮（筑波大学理工情報生命学術院 システム情報工学研究群），藤野　貴康（筑波大学システム情報系）

著者名(英語): Yuki Sakamoto (Graduate School of Systems and Information Engineering, University of Tsukuba), Ryo Sasaki (Graduate School of Science and Technology, University of Tsukuba), Takayasu Fujino (Faculty of Engineering, Information, and Systems, University of

キーワード: 非平衡ディスク形MHD発電機，等エントロピー効率，全圧損失，電磁流体解析　　nonequilibrium disk-shaped MHD generator，isentropic efficiency，total pressure loss，magnetohydrodynamic analysis

要約(英語): We conduct an axisymmetric, two-dimensional (r-z) magnetohydrodynamic numerical analysis of a large-scale, nonequilibrium disk-shaped MHD generator with a thermal input of 1 GW to examine the influence of a total pressure loss between the hot duct inlet and the supersonic nozzle outlet of the MHD generator on its isentropic efficiency. Numerical results show that the total pressure loss there substantially affects the isentropic efficiency of the MHD generator. Most of the total pressure loss there, which is mainly caused by a self-excited Joule heating, occurs in a localized area from the vicinity of the hot duct outlet to the radial position of the upstream edge of anode. The numerical results also indicate that the isentropic efficiency is improved by widening an anode width toward the upstream side of the supersonic nozzle. This is because the total pressure loss due to the self-excited Joule heating in the supersonic nozzle decreases by widening it.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.141 No.5 （2021）

本誌掲載ページ: 391-399 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/141/5/141_391/_article/-char/ja/