Inner flow characteristics at impeller of submersible mixer with two blades
1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.National Research Center of Pumps and Pumping System Engineering and Technology, Zhenjiang, Jiangsu 212013, China
Abstract：To investigate the performance of submersible mixer, according to k-ε turbulence model and SIMPLE algorithm, the fluid in the cesspools with submersible mixer was simulated by Fluent 6.3 MRF technology. Inner velocity flow, pressure and circulation of high speed submersible mixer were analyzed. The numerical simulation results show that the gradient of velocity and pressure is significant from blade working face to back in impeller. The fluid velocity near blade working face is low with high pressure. There are high velocity and negative pressure zones near suction side. The axial velocity shows a parabolic distribution at impeller inlet and outlet with gentle change of velocity circulation. The axial velocity is approximately uniform at blade outlet with linear distribution of velocity circulation at blade inlet and outlet. The inner flow in impeller is stable to ensure decreased inverse flow with high operating efficiency of impeller.
2013, Vol. 34 
