Abstract：The internal flow in an axial flow tandem pump at various flow rates was computed numerically using CFD code to predict the pump performance of the pump and analyze the interaction between tandem impellers. The FBM turbulence model, in which RANS and LES are blended, was adopted in the computation, and validated against the experimental data, suggesting the model not only is able to predict the performance more precisely but also has a better resolution than the standard k-ε turbulence model. It was demonstrated that the pump head decreases monotonously but the shaft power rises slightly with increasing flow rate, showing a good regulating characteristic. The front impeller has almost the same characteristics with conventional axial flow impellers; however, the front impeller performance at a low flow rate is clearly improved by the rear impeller. Comparing with conventional axial flow impellers, the rear impeller exhibits a stable head curve over a significantly wide range of flow rate because the flow pattern in its entrance has been improved by the front impeller.
赵宇, 王国玉, 白泽宇, 俞启东. 串列式轴流泵首次级叶轮能量特性及相互作用[J]. 排灌机械工程学报, 2013, 31(3): 210-214.
ZHAO Yu, WANG Guo-Yu, BAI Ze-Yu, YU Qi-Dong. Characteristics and interaction of front and rear impellers of axial flow tandem pump. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(3): 210-214.
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