JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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title同期旋回キャビテーション初生時のキャビティ不均一長さと軸振動の相互関係
Other TitleInteraction between uneven cavity length and shaft vibration at the inception of synchronous rotating cavitation
Author(jpn)吉田 義樹; 永浦 克司; 風見 佑介; 島垣 満; 伊賀 由佳; 井小萩 利明
Author(eng)Yoshida, Yoshiki; Nagaura, Katsuji; Kazami, Yusuke; Shimagaki, Mitsuru; Iga, Yuka; Ikohagi, Toshiaki
Author Affiliation(jpn)宇宙航空研究開発機構 宇宙輸送ミッション本部 宇宙輸送系推進技術研究開発センター; 航空宇宙技術振興財団; 東北大学流体科学研究所; 宇宙航空研究開発機構 宇宙輸送ミッション本部 宇宙輸送系推進技術研究開発センター; 東北大学流体科学研究所; 東北大学流体科学研究所
Author Affiliation(eng)Japan Aerospace Exploration Agency Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate; Foundation for Promotion of Japanese Aerospace Technology; Institute of Fluid Science, Tohoku University; Japan Aerospace Exploration Agency Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate; Institute of Fluid Science, Tohoku University; Institute of Fluid Science, Tohoku University
Issue Date2008-08-29
PublisherJapan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構
Publication date2008-08-29
Languagejpn
AbstractAsymmetric cavitation is known as one type of the sources of cavitation induced vibration in turbomachinery. Cavity lengths are unequal on each blade under condition of synchronous rotating cavitation, which causes synchronous shaft vibration. To investigate the relationship of the cavity length, fluid force and shaft vibration in a cavitating inducer with three blades, we observed the unevenness of cavity length at the inception of synchronous rotating cavitation. The fluid force generated by the unevenness of the cavity length was found to grow exponentially in progress of time, and the amplitude of shaft vibration was also observed to increase exponentially. These experimental results indicate that the synchronous shaft vibration due to synchronous rotating cavitation is one type of self-excited vibrations arising from the coupling between cavitation instability and rotordynamics.
DescriptionJAXA Research and Development Memorandum
宇宙航空研究開発機構研究開発資料
Keywordscavitation; liquid propellant rocket engine; structural vibration; turbomachinery; self induced vibration; helical inducer; cavity length; rotating shaft; amplitudes; キャビテーション; 液体燃料ロケットエンジン; 構造振動; ターボ機械; 自励振動; ヘリカルインデューサ; キャビティ長さ; 回転軸; 振幅
Document TypeTechnical Report
JAXA Category研究開発資料
ISSN1349-1121
SHI-NOAA0064092000
Report NoJAXA-RM-08-002
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/49702


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