Abstract: Severe vibration problems were encountered during initial operation of large Deriaz pumps. This paper describes those problems, the alternative solutions available, and the corrective action taken. ...

Abstract: Higher settings of hydraulic turbines are proposed which will result in lower relative tailwater levels with associated operational improvements. Present selling criteria may lead to unsatisfactory ...

Abstract: Hydraulic turbine instability at speed-no-load was experienced during the initial operation of two impulse turbines having very long penstocks. This paper describes the steps taken to achieve ...

Abstract: Severe vibration of a hydraulic turbine was found to be self-excited. Vibration at the natural frequency when operating at synchronous speed produced self-sustaining whirl of the shaft. Gyroscopic ...