Visualization test on solid-liquid two-phase flow in a multistage pump
WU Xianfang1, SONG Jushen1, WANG Kai2, LIU Heming3, YE Heyu1, TAN Minggao2*
1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Nationnl Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 3. Mingguang Liuxiang Pump Industry Co. Ltd., Chuzhou, Anhui 239400, China
Abstract：In order to study the flow characteristics of the solid-liquid two-phase flow in a multistage pump, the energy performance test and high-speed photography test were carried out to test the energy performance and particle motion law of the pump. The test results show that the head and efficiency of the pump under the solid-liquid two-phase flow condition are lower than those at the corresponding water flow rate, and the maximum reduction are 0.32 m and 2.92%, respectively. With the increase of particle diameter and density, the influence on the energy performance of the pump is more significant. Particles with different physical properties in the guide vane passage have a tendency to the guide vane pressure side. When the particles enter the guide vane, the closer the position to the back of the guide vane, the longer the trajectory. With the decrease of particle density and diameter, the trajectory of particles in fluid becomes smoother. At the inlet region of the guide vane, particles mainly enter the guide vane passage from the back of the guide vane, and the proportion of particles entering the guide vane from this position gradually decreases with the increase of particle diameter, and first increases and then decreases with the increase of particle density. The probability of collision between particles and guide vane head increases with the increase of particle diameter, and decreases with the increase of particle density.
