著者

山田 和豊 喜久田 啓明 古川 雅人 郡司嶋 智 原 靖典

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集B編 (ISSN:18848346)

巻号頁・発行日

vol.79, no.801, pp.900-916, 2013 (Released:2013-05-25)

参考文献数

28

被引用文献数

1 1

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Flow fields near rotating stall inception in a low-speed axial compressor rotor with two different tip clearances have been investigated by instantaneous measurements of casing wall pressure distributions using 30 high response pressure transducers and by detached eddy simulations (DES) using 120 million grid points. It is found that the stall inception process in the large tip clearance case is dominated by the breakdown of the rotor tip leakage vortex, in contrast to the spike-type stall inception in the small tip clearance case which is dominated by the leading-edge separation near the rotor tip. The vortex breakdown induces the large oscillation of the tip leakage vortex with its unsteady nature, resulting in the low-pressure regions in the instantaneous casing wall pressure field and the high pressure fluctuation region on the pressure side of the adjacent blade tip in the ensemble-averaged casing wall pressure field. The large blockage effect due to the tip leakage vortex breakdown causes the rotating disturbance propagating in the circumferential direction, which can appear and disappear with a slight change in the flow rate.

著者

佐藤 宏司 新井 史人 福田 敏男 糸魚川 貢一 塚原 靖典

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌E(センサ・マイクロマシン部門誌) (ISSN:13418939)

巻号頁・発行日

vol.120, no.3, pp.128-133, 2000-02-20 (Released:2009-04-01)

参考文献数

13

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Parallel beam structure has many significant features, as follows. (i) The tip moves in parallel at the end. (ii)This structure converts the small displacement into the large strain. (iii) Each unit doesn't interfere to the other units by piling up this structures. We used this structure for piezoelectric vibrating gyroscope (angular rate sensor). In this paper, we analyzed features of the parallel beam structure by Finite Element Method, and showed that the resonance frequency of the drive unit and the sensor unit can be easily adjusted by changing the mass at the tip. From this result, this structure suits for the gyroscope. Experimental results are shown.

著者

松原 寛和 中村 衣江 中原 靖典

出版者

日本産科婦人科学会

雑誌

日本産科婦人科學會雜誌

巻号頁・発行日

vol.42, pp."S-400", 1990

著者

梶山 広明 柴田 大二郎 丹羽 慶光 鈴木 裕香 若原 靖典 北川 武司 大野 泰正 河井 通泰 柿原 正樹 有井 吉太郎

出版者

社団法人日本産科婦人科学会

雑誌

日本産科婦人科學會雜誌 (ISSN:03009165)

巻号頁・発行日

vol.50, pp."S-519", 1998-02-20