304 低流量域におけるねじ形遠心ポンプ内部流れの三次元数値シミュレーション(O.S.2-1 ターボ機械I)(O.S.2 内部流れと流体機械・機器の諸特性)

概要

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This paper describes a numerical simulation of three dimensional flow in a screw-type centrifugal pump with tip clearance at different now rates (Q/Q_d=1.0, 0.8, 0.6). A reliable commercial three-dimensional Navier-Stokes code with a standard k-ε turbulence model, CFX-TASCflow, was used for this study. The Transient Sliding Interface condition was used to catch up the interaction between the impeller and volute casing. At the design point the calculated now was reasonable and they agreed well with the experimental results. However, the simulation results show that the flow pattern is changed by the flow rate and the influence of tip clearance is remarkable in this pump type.
社団法人日本機械学会の論文
2000-10-17