Abstract:In the case of different impeller outlet diameters,the flow field in six centrifugal pumps was simulated by using FLUENT code.The standard k-ε turbulence model and SIMPLEC algorithm were chosen in FLUENT.The simulation was steady and moving reference frame was used to consider rotor-stator interaction.According to the simulation results,the head and shaft power of the model were predicted and the results were in accordance with cutting law,but the prediction efficiency was not constant.The flow analysis indicates that the change of impeller outlet diameter has obvious effects on static pressure and total pressure at impeller outlet and in volute.Also the change of impeller outlet diameter has important impacts on absolute velocity distribution,especially near the cutwater of the volute.When the cutting quantity is greater than 4%,the flow separation at the diffusion section of volute will disappear.
谈明高, 刘厚林, 王勇, 王凯, 董亮. 叶轮外径对离心泵内流影响的CFD分析[J]. 排灌机械工程学报, 2009, 27(5): 314-318.
Tan Minggao,Liu Houlin,Wang Yong,Wang Kai,Dong Liang. CFD analysis on effects of impeller outlet diameter on flow field in centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2009, 27(5): 314-318.
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