Flow in a Centrifugal Pump Impeller at Design and Off-Design Conditions—Part II: Large Eddy Simulations
作者： Rikke K. Byskov , Christian B. Jacobsen , Nicholas Pedersen
DOI: 10.1115/1.1524586
关键词: Computational fluid dynamics 、 Physics 、 Turbulence 、 Turbomachinery 、 Mechanics 、 Classical mechanics 、 Impeller 、 Centrifugal pump 、 Reynolds-averaged Navier–Stokes equations 、 Particle image velocimetry 、 Large eddy simulation
摘要: The flow field in a shrouded six-bladed centrifugal pump impeller has been investigated using large eddy simulation (LES). effect of the subgrid scales modeled through localized dynamic Smagorinsky model implemented commercial CFD code FINE/Turbo. A detailed analysis results LES at design load, Q =Q d , and severe off-design conditions, quarter-load Q=0.25Q is presented. At load reveals well-behaved with no significant separation. differences between adjacent passages are revealed. steady nonrotating stall phenomenon observed entrance one passage relative develops remaining part passage. unblocks which exhibits dominated by rotational effects. Velocities predicted steady-state Reynolds averaged Navier-Stokes (RANS) simulations based on Baldwin-Lomax Chien k-e turbulence models compared experimental data obtained from particle image velocimetry (PIV)
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