【摘要】 应用SSTkω-湍流模型对Rushton搅拌釜流场进行了计算,并与文献报道实验数据以及标准k-ε模型、RNGkω-模型预测结果进行了比较。结果表明SSTkω-模型所计算的排除流量准数与实验值相差较小,桨叶区速度场与实验数据吻合较好,略优于标准k-ε模型,同时也给出了近壁区的计算结果。在湍动动能的预报上,SSTk-ω模型值与标准k-ε模型比较接近,优于RNGkε-模型,但与实验值都还不同程度地存在着一些差异。更多还原

【Abstract】 The shear-stress transport(SST) k-ω turbulence model was a viscous two-equation turbulence model(established) on Boussinesq hypothesis,which combined both the advantage of k-ω model simulation in boundary(layer) and the advantage of k-ω model simulation in main flow region.The results of numerical simulation by SST k-ω model for(velocity) field in standard Rushton stirred tank were slightly better than those simulated by standard k-ε model and also well fitted the reported experimental data.The value of pumping number calculated by SST k-ε model was slightly lower than experimental value and the predicted velocity data near wall region also were provided.The prediction ability for turbulent energy by SST kω model approached standard k-ε model′s ability,and both of them were better than RNG k-ε model.However there still are some differences between model values and(experimental) data in this aspect.更多还原