http://swrc.ontoware.org/ontology#TechnicalReport
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
ja
Cavitation
Surging
Inducer
Stability
Acoustic Resonance
南里 秀明
藤原 徹也
河南 広紀
吉田 義樹
Nanri Hideaki
Fujiwara Tetsuya
Kannan Hiroki
Yoshida Yoshiki
宇宙航空研究開発機構
Japan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構研究開発資料
JAXA-RM-11-006
1-9
2011-11-30
The 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.
形態: カラー図版あり
Physical characteristics: Original contains color illustrations
1349-1121
AA11983593
資料番号: AA0065097000
レポート番号: JAXA-RM-11-006