第1个回答 2012-12-26
With CFD technology as the foundation, contrast speed 84.5 single-stage single-suction centrifugal pump and transport the internal flow, the three-dimensional unsteady full flow field numerical simulation calculation, the Reynolds time-averaged equation and standard k - ɛ turbulence model, the pressure and velocity coupling the SIMPLEC algorithm, the centrifugal pump two-way operation at the same speed, different flow conditions, axial force characteristic analysis, analysis of the centrifugal pump in the pump working condition and turbine condition, cover, leaf, inner surface produced by the axial force changes, and illustrates the reasons, and further study the pump working condition and turbine conditions total axial force change trend. The simulation results show that with the increase of flow, pump under the condition of total axial force decrease gradually, and the empirical formula change trend match, turbine conditions total axial force increase gradually, its reason still needs further research. In their respective optimal condition near, turbine condition of total axial force is pump working condition the total axial force of 1.2 times the left and right sides.