Clocking effect in a centrifugal pump with a vaned diffuser

• DOI: 10.1142/s0217984920502863
• Publication Date: 2020-07-09T14:21:26Z
• Authors: Fen Lai; Xiangyuan Zhu; Yongqiang Duan; Guojun Li
• Keywords: Volute; Diffuser (optics); Total pressure; Centrifugal fan; Specific speed; Static pressure

The performance and service life of centrifugal pumps can be influenced by the clocking effect. In this study, 3D numerical calculations based on k-omega shear stress transport model are conducted to investigate effect in a pump. Time-averaged behavior transient analyzed. Results show that optimum diffuser installation angle pump is [Formula: see text] due minimum total pressure loss radial force acting impeller. Total loss, particularly volute, considerably difference volute at different positions 2.75 m under design flow rate. large primarily caused gradient within vicinity tongue. impeller also affected When text], rate fluctuations passage minimal, distribution more uniform than those other angles. Moreover, static midsection inlet section value. These phenomena explain findings study provide useful reference for pumps.