The effect of blade wrap angle on the radial force of centrifugal pump as turbine

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (18) : 69-72.

Dai Cui 1，Kong Fanyu,2， Dong Liang ,2，Zhang Hui,2， Feng Zizheng

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Abstract

In order to study the effects of blade wrap angle on the radial force of centrifugal pump as turbine, a single volute vaneless counter-rotating centrifugal pump was chosen as research object. The blade wrap angle was varied from 100° to 115°and 130°, while the volute and other geometric parameters were kept constant. The transient flow characteristics under multi operating conditions in whole flow passages of a centrifugal pump as turbine was studied numerically using CFX, with demonstrated energy performance. The results show that when the blade warp angle increases more than a certain value, the radial force on the impeller reduces little at low flow rates, while reduces obviously at high flow rates. The radial force on the volute reduces and moves to the fourth quadrant as the blade warp angle increases. The blade warp angle should be at suitable range to ensure a lower radial force level at higher flow rates.

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centrifugal pump / pump as turbine / radial force / blade wrap angle

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Dai Cui1,Kong Fanyu 2,Dong Liang 2， Zhang Hui 2， Feng Zizheng2. The effect of blade wrap angle on the radial force of centrifugal pump as turbine[J]. Journal of Vibration and Shock, 2015, 34(18): 69-72

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