Numerical Investigation of Secondary Flow in 3 Pump Stages: Centrifugal Multistage/Mixed-flow Stage/ Axial-flow Stage

원심형, 사류형, 축류형 펌프단에서 살펴본 이차유동의 수치적 고찰

Centrifugal pump shows the strongest secondary flow. Wake is formed near pressure surface close to hub at impeller exit for centrifugal pump impeller. Pressure gradient drives secondary flow in the inducer region, while in the remaining region the following sources drive together: > Pressure gradient > Coriolis force Low-momentum fluid near suction surface hub moves toward pressure surface hub in mixed-flow pump impeller. Tip leakage vortex dominate secondary flow in axial-flow pump impeller. Tip leakage vortex dominate secondary flow in axial-flow in axial-flow pump impeller