2439 逆流渦キャビテーションによって発生する軸振動について(S48-1 キャビテーション流れ(1),S48 キャビテーション流れ)  [in Japanese] 2439 Observation of Shaft Vibration Caused by the Clouds of Cavitation in Backflow Vortices  [in Japanese]

The component of shaft vibration, which rotates 2.5 times faster than shaft rotation, was observed during a Lox turbopump test. From the spectrum analyses of dynamic pressure around the inducer, the shaft vibration was assumed to be caused by the clouds of cavitation in backflow vortices. In this study, some visual observations around inducer were conducted and discussed about relationship of the shaft vibration and the clouds of cavitation in backflow vortices.