Investigation on Reduction of Pressure Fluctuation for a Double-Suction Centrifugal Pump

Abstract Double-suction centrifugal pumps have been applied extensively in many areas, and the significance of pressure fluctuations inside these with large power is becoming increasingly important. In this study, a double-suction pump high-demand for vibration noise was redesigned by increasing flow uniformity at impeller discharge, implemented combinations more than two parameters. First, number blades intended to enhance bounding effect that imposed on fluid. Subsequently, radial gap between volute reduce rotor-stator interaction. Finally, staggered arrangement optimized weaken efficacy interference superposition. Based numerical simulation, steady unsteady characteristics models were calculated. From fluctuation analysis frequency domain, dimensionless amplitude blade passing its harmonics, located monitoring points (both larger gap), are reduced lot. Further, model new impellers 12°, average value decreases 6% prototype pump. The root-mean-square contour mid-span tends be uniform gap); similarly, mid-section presents good models, which turn demonstrating reduction intensity. results reveal mechanism pump, study could provide reference performance reinforcement other pumps.