CFD simulations on flow field of centrifugal pumps are widely used to investigate the inner flow and predict pump performance due to its convenience and accuracy, which have already been an effective tool in fluids machinery field. However, CFD research of the shutoff is currently performed by means of the minor-flow assumption, which is different from real operating conditions and difficult to well predict pump performances at shutoff conditions. In this paper, the zero-flow boundary condition is applied to numerical simulation of unsteady flow for the IS125 centrifugal pump with the unsteady CFD techniques. The pump performances are predicted and verified by the pump performance test. The numerical result shows that there are different distributions of flow field and flow rates in the impeller channels, leading to serious fluctuations of pump performance. At the shutoff, the volute tongue suffers from the most serious flow impact among various operating conditions. It is also found that the channels of the impeller close to the upstream of volute are water-discharging, but the channels of the impeller near the downstream of volute are water-inhaling. This method enables effective investigation of the flow field and characteristics at shutoff conditions. The obtained impeller channel flow ability may have academic and engineering values.
HUANG Si
,
YANG Wenjuan
,
SU Xianghui
,
OU Guowei
. Flow Performance Analysis of Shutoff Condition in Centrifugal Pump Based on CFD Simulation[J]. Science & Technology Review, 2014
, 32(10)
: 80
-83
.
DOI: 10.3981/j.issn.1000-7857.2014.10.014
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