Investigation on energy dissipation mechanism in a double-suction centrifugal pump based on Rortex and enstrophy

Since double-suction centrifugal pumps consume quantities of energy, revealing critical factors for energy dissipation is helpful energy-saving design. This study aims to investigate the relationship between and vortex based on Rortex method in a pump. Detached eddy simulation was applied obtain flow field. Enstrophy used present strength local rigid shear. The results indicate that shear dominates Owing jet flows, loss blade leading edges (LE) trailing (TE) were 102-103 times middle region at 0.4Qd ten 1.4Qd. pressure sides (PS) greater than suction (SS) TE, while separation SS caused by wake increased nearly PS. Jet-wake near volute inlet dominant factor part-load, flows discharge more significant overload. induced high responsible dissipation. Therefore, reducing potential approach pumps.