Abstract：To analyze the pressure fluctuation and the hydraulic force on the impeller between the rotor and stator in a centrifugal pump, the three-dimensional simulation was performed for the solid-liquid two-phase turbulent flow in a centrifugal pump with radial diffuser by the mixture multiphase model, the Large Eddy Simulation turbulence model and sliding mesh technology. The results indicate the pressure coefficients of both the water and solid-liquid flow decrease gradually with the increase of the flow rate; pulse also becomes regular gradually with the increase of the flow rate. On the interface of rotor and stator, the particle enhanced the high-frequency pressure fluctuation at the low flow rate, while at the high flow rate the particle weakened the high-frequency pressure fluctuation. In the rotor, the particle weakened the high-frequency pressure fluctuation at the low flow rate, while at the high flow rate, the particle enhanced the high-frequency pressure fluctuation. In the volute, the particle does not affect the pressure fluctuation, while in the tongue the particle enhanced the high-frequency pressure fluctuation. On the interface of the rotor and stator, the minimum impact of particles on pressure pulsation amplitude is 1.4Q, while the maximum is 0.2Q; in the rotor, the minimum impact of particles on pressure pulsation amplitude is 1.4Q, while the maximum is 0.6Q; in the volute, the minimum impact of particles on pressure pulsation amplitude is 1.0Q, while the maximum is 0.2Q; in the tongue, the minimum impact of particles on pressure pulsation amplitude is 1.0Q, while the maximum is 0.2Q.
韩伟, 金毅, 李仁年, 岳婷, 权辉. 颗粒对离心泵内部压力脉动特性的影响[J]. 排灌机械工程学报, 2015, 33(6): 467-474.
Han Wei, Jin Yi, Li Rennian, Yue Ting, Quan Hui. Effects of particles on pressure fluctuation characteristics in centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(6): 467-474.
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