Abstract
The pressure pulsation for a centrifugal blower piping system with the discharge opening below the water surface has been investigated. The experiments are carried out using the centrifugal blower facility with a plenum chamber, and the pressure in the pipe line is measured for various parameters such as the number of revolution of the blower, the opening of the throttle valve, and the depth of the discharge opening. A one-dimensional model is proposed to predict the transient response of the compression system, and the results were compared with the experimental results. It is clear that the amplitude and the period of the pressure fluctuation in the plenum chamber increase as the depth increases. The diameter of the air ejection hole influences the pressure fluctuation. The results obtained by the calculation model agree approximately with those obtained by experiments.
