Analysis of Steady Flow Characteristics and External Characteristics of Vortex Pump
Vortex pump has typical external characteristics such as high head,steep drop in head curve and a struc-tural feature that is easy to process,making it widely used in industries such as chemical and pharmaceutical in-dustries.In order to investigate the complex internal flow characteristics of the vortex pump and analyze its exter-nal characteristics,a standard k-e two-equation model is adopted for numerical simulation of the full flow path and full flow rate operating conditions of the vortex pump.The results show that the external characteristic curve indi-cates that the vortex pump has a maximum efficiency of about 35％and the head has a steep drop feature.The a-nalysis of the internal flow field reveals that the pressure distribution characteristics are uniform and present a cer-tain pressure gradient,and there is obvious circulating motion in the impeller flow passage.Under high flow rate conditions,the length of the circulating area is approximately 2/3 of the peripheral length of the impeller,which represents the optimal operating condition for the vortex pump.
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