采用基于k-ωsst湍流模型的延迟脱体涡模拟DDES(Delayed-Detached Eddy Simulation)混合算法对施加Gurney襟翼的两段翼进行了数值模拟,重点讨论了DDES与非定常雷诺平均方法 URANS(Unsteady Reynolds-Averaged Navier-Stokes)对Gurney襟翼分离绕流的数值模拟能力,并与试验结果进行对比。计算结果表明DDES方法结合了URANS与大涡模拟LES(Large Eddy Simulation)的优点,在分离流场脱体涡模拟方面具有优势,在Gurney襟翼的流场研究中体现出更强的模拟能力。 A two-stage wing with Gurney flaps was simulated by the Delayed-Detached Eddy Simulation (DDES) algorithm based on the k-ωsst turbulence model. The DDES and Unsteady Reynolds Average Method URANS (Unsteady Reynolds-Averaged Navier-Stokes) on the Gurney flaps were compared with the experimental results. The results show that the DDES method combines the advantages of URANS and LES (Large Eddy Simulation), and has advantages in the separation of flow field and extrinsic eddy simulation. It shows more simulation capability in the study of flow field of Gurney flaps.