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Experimental study on inlet vortex in pump sump

作者:SONG; Xijie; LIU; Chao School; of; Hydraulic; Energy; and; Power; Engineering; Yangzhou; University; Yangzhou; Jiangsu; 225100; China

摘要:In order to study the mechanism of the vortex generation at the bottom of the pump sump below the flare tube,twenty pressure pulsation monitoring points were arranged at the bottom of the pump sump below the flare tube,and the pressure fluctuation experiments were carried out under different flow conditions.The experimental results show that the frequency of pressure fluctuation at the bottom of the pump sump is twice of the rotational frequency of the impeller blade.The vortex below the flare tube is easy to generate under the large flow conditions and mainly concentrates at the right front position below the flare tube.The position of the vortex occurring is corresponding to the position of the low-pressure region below flare tube.

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