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titleターボポンプ単体試験で発生した共鳴キャビテーションサージの一次元非線形解析による検討
Other TitleStudy of Acoustic Cavitation Surge in a Turbopump using One-dimensional Nonlinear Analyses
Author(jpn)南里, 秀明; 藤原, 徹也; 河南, 広紀; 吉田, 義樹
Author(eng)Nanri, Hideaki; Fujiwara, Tetsuya; Kannan, Hiroki; Yoshida, Yoshiki
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; 東北大学大学院工学研究科機械系; 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; 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
Author Affiliation(eng)Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA); Division of Mechanical Engineering, Graduate School of Engineering, Tohoku University; Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA); Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA)
Issue Date2011-11-30
Publisher宇宙航空研究開発機構
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構研究開発資料
JAXA research and development memorandum
VolumeJAXA-RM-11-006
Start page1
End page9
Publication date2011-11-30
Languagejpn
eng
AbstractThe cavitation surge is a kind of instability phenomenon generated in a liquid rocket engine, and it is known that when the inlet pressure of the turbopump of the engine is decreased, the frequency of cavitation surge continuously varied. On the other hand, it was observed in a turbopump test conducted in JAXA that the frequency of cavitation surge discontinuously decreased when the inlet pressure was decreased. Aiming at explaining this curious phenomenon, we conducted the linear analysis using the frequency-domain method and found that this phenomenon was a kind of self-excited vibration coupling the cavitation characteristics with the acoustic resonance of the inlet pipeline. However, the linear analysis could not simulate the phenomenon that a frequency of standing wave changed to the other mode at a certain inlet pressure. Therefore, we conducted the nonlinear analysis using the one-dimensional time-domain method. As a result, it was found that when the inlet pressure was decreased, the damping effect became larger in the higher frequency oscillation because of nonlinear factors. Consequently, the oscillation of higher frequency was intensely weakened and the oscillation of lower one appeared instead.
DescriptionPhysical characteristics: Original contains color illustrations
形態: カラー図版あり
KeywordsCavitation; Surging; Inducer; Stability; Acoustic Resonance
Document TypeTechnical Report
JAXA Category研究開発資料
ISSN1349-1121
NCIDAA11983593
SHI-NOAA0065097000
Report NoJAXA-RM-11-006
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/14800


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