Numerical Simulation and Experimental Study of Gas-liquid Two-phase Flow in a Centrifugal Pump
The split vane impeller is widely used in the petroleum industry because the separation and offset of its blades can handle the gas-liquid flow well.In this paper,visualization and numerical simulation are used to study the gas-liquid flow characteristics in the split vane impeller.In the impeller,the gas pocket first appears at the inlet of the inner blade and the suction surface of the outer blade.The gas pocket is impacted by the fluid from the adjacent flow channel as it extends to the position where the blade is separated and offset.When the Eulerian-Eulerian model is used,the gas-liquid flow in the impeller obtained by numerical simulation is consistent with that obtained by visualization.In the impeller channel,the area occupied by the gas pocket loses the pressurization capability,while the area not occupied by the gas pocket still retains some pressurization capability.
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