关键词: 黏性泵, 双级泵, 流场, 漩涡

Abstract:

The flow dynamic behaviors and characteristics of a staggered viscous pump with two rotating cylinders were numerically investigated by 2-D laminar model.The flow field of the staggered viscous pump can be divided into three regions, or the downstream region without vortex, the upstream region with vortex, and the region between two rotors.The flow field in the region between two rotors develops with the rotor spacing rising, and there appears obvious vortex with large rotor spacing.As Reynolds number increases, the dimensionless flow rate significantly drops for large vortex, and it approaches to constant at low Reynolds number.As the rotor eccentricity rises, the dimensionless flow flux increases almost linearly for the nonequilibrium effect, and the dimensionless driving power increases with smaller amplify.When the rotor spacing rises, the dimensionless flow flux drops, while the driving power will first increase and then decrease.

Key words: 黏性泵, 双级泵, 流场, 漩涡