Summary
O-type ball valves are widely used in various fields. The nonlinear vibration of O-type ball valves would cause damage on valve components and accessories, and flow-induced vibration is the major component of the whole vibration. During the use of valves, cavitation often occurs, accompanied by more severe vibrations. Therefore, it is crucial to investigate the effect of cavitation on valve vibration. In this paper, fluid solid interaction (FSI) method is used to study the vibration characteristics of an O-type ball valve with and without cavitation, the mechanism of cavitation leading to unbalanced intensification of vibrations in three axes is elucidated and it is concluded that cavitation increases the amplitude of the primary vibration frequency of the valve through the spectrogram comparison.
