Title: Performance Prediction of a Supercritical Boiler Feed Water Pump Based on Subsection Characteristics and Turbulence Models
Abstract:With the type CHTZ6/6supercritical boiler feed water pump as the study model,the 3Dmodel of internal flow passage of the multistage-pump was established.Based on the CFD technology and the large-scale...With the type CHTZ6/6supercritical boiler feed water pump as the study model,the 3Dmodel of internal flow passage of the multistage-pump was established.Based on the CFD technology and the large-scale parallel computer,the steady numerical simulation of multi-operating points were conducted.It was shown that the simulated performance parameters of RNG mode obtained at the rated point and at the maximum flow point closely coincided with the experimental ones while the simulation error at the minimum flow point was large.A contrast between rated conditions and low flow condition showed that there were lots of shedding vortexes and rotating stall groups in the flow passage when the third channel center section was under the low flow condition.And then the SST model was used to piecewise calculate the low flow conditions,and when the SST simulation model was below 0.8 qv,n,the efficiency of the simulations was increased and the numerical error was decreased.Thus,the external characteristic curve that is closer to the real performance of the curve was obtained.Read More
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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