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2011•The KSFM Journal of Fluid MachineryRequires access

Performance Evaluation on Impeller Related Parameters Change in Centrifugal Pump of very Low Specific Speed

Young-Dae Choung, Kye-Bock Lee

Open publisher page 2 citations

Abstract

The numerical study was conducted to investigate the pump performance due to impeller related parameters change in centrifugal pump of very low specific speed by using CFD code. A small centrifugal pump whose specific speed is NSUBS/SUB=76.2 was used, and the performance characteristics were discussed for different number of vanes, rotational speed, and the length and height of vane.BR The numerical results at a very low specific speed show that the increase of the number of vanes has little effect on improvement of output pressure but results in the reduction of pressure fluctuation, and that the head increases with the increase in the rotational speed. The decreasing the length of vane has a considerable reduction of the capacity coefficient in comparison with decreasing the height of vane.

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What this paper is about

The numerical study was conducted to investigate the pump performance due to impeller related parameters change in centrifugal pump of very low specific speed by using CFD code. A small centrifugal pump whose specific speed is NSUBS/SUB=76.2 was used, and the performance characteristics were discussed for different number of vanes, rotational speed, and the length and height of vane.BR The numerical results at a very low specific speed show that the increase of the number of vanes has little effect on improvement of output pressure but results in the reduction of pressure fluctuation, and that the head increases with the increase in the rotational speed. The decreasing the length of vane has a considerable reduction of the capacity coefficient in comparison with decreasing the height of vane.

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Available abstract

The numerical study was conducted to investigate the pump performance due to impeller related parameters change in centrifugal pump of very low specific speed by using CFD code. A small centrifugal pump whose specific speed is NSUBS/SUB=76.2 was used, and the performance characteristics were discussed for different number of vanes, rotational speed, and the length and height of vane.BR The numerical results at a very low specific speed show that the increase of the number of vanes has little effect on improvement of output pressure but results in the reduction of pressure fluctuation, and that the head increases with the increase in the rotational speed. The decreasing the length of vane has a considerable reduction of the capacity coefficient in comparison with decreasing the height of vane.

Key concepts: Impeller, Rotational speed, Specific speed, Centrifugal pump, Mechanics, Computational fluid dynamics, Materials science, Reduction (mathematics)

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