Sajben扩压器复杂流动中湍流模型的性能评估

用8个常用的湍流模型对Sajben扩压器中跨声速流动进行了数值模拟，评估了Spalart-Allmaras， 标准k-ε， RNG (re-normalization group) k-ε，realizable k-ε，标准k-ω，SST(shear stress transport) k-ω，v2-f，Reynolds stress共8个湍流模型对激波/湍流边界层相互作用的模拟预测能力.通过与实验数据比较发现:SST k-ω模型和v2-f模型比其他模型模拟的更准确，其中SST k-ω模型比v2-f更能准确地预测壁面压力，然而对于分离点、再附点以及分离区长度v2-f比SST k-ω预测得更准确. 

Performance evaluation of turbulence models for complex flows in Sajben diffuser

Eight turbulence models were employed in the detailed numerical investigations for transonic flows in the Sajben diffuser,so as to assess the predictive capabilities of the turbulence models for shock-wave/turbulent boundary layer interactions in internal flows,including the Spalart-Allmaras model,the standard k-ε model,the RNG (re-normalization group) k-ε model,the realizable k-ε model,the standard k-a model,the SST (shear stress transport) k-ω model,the v2-f model,and the Reynolds stress model.The performance of these different turbulence models was systematically assessed by comparing the numerical results with the available experimental data.The v2-f model and the SST k-ω model performed much better than other models,and the SST k-ω model predicted a little better than the v2-f model for pressure on walls,while v2-f model predicted a little better than the SST k-ω model for separation location,reattachment location and separation length in strong shock case.