Design Considerations for Power‐Plant Pump Noise Reduction

Reduction in vibration, pressure pulsations, and noise in power‐plant centrifugal pumps can be achieved by increased impeller to volute tongue distances, improved geometric relationship between the tongue and impeller to minimize the shock of sudden fluid deceleration, control of impeller suction and discharge recirculation effects, and the elimination of hydraulic whirl set up in wearing ring annuli. In addition to the benefits of lower noise and vibration, less destruction of the surfaces of the impeller and volute by cavitation erosion is experienced.