Abstract:The internal 3D flow field of rotational flow self-priming pump was simulated numerically by using commercial CFD software FLUENT.Standard k-ε model was adopted in calculation,and reference frame model was chosen to couple the static-dynamic flow field of impeller and volute.The flow fields of pressure and turbulent kinetic energy near guide wall were obtained,and guide wall influence on flow field was analyzed.A performance prediction model was established.The influence of guide wall structure on performance was discussed by comparing the prediction performances of three models with diffe-rent guide wall wrap angles of 55°,65°,70°.It is shown that the guide wall structure has some influence on the performance and wrap angles of 65° is the optimal structure from three guide wall structures.The predicted results are also in agreement with experimental results.
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