Unsteady Wake of the NASA Common Research Model in Low-Speed Stall
Unsteady Wake of the NASA Common Research Model in Low-Speed Stall
复制标题
NASA 低速失速通用研究模型的不稳定尾迹
DOI：
10.2514/1.c033413
复制
发表时间：
2016
影响因子：
2.2
通讯作者：
E. Krämer
中科院分区：
文献类型：
--
作者：
A. Waldmann;Philipp P. Gansel;T. Lutz;E. Krämer
随着欧洲战略风洞改进研究潜力测试活动在欧洲跨音速风洞中的完成，存在着大量数据用于比较和验证高雷诺数下的计算结果。在低速失速条件下，使用NASA共同研究模型进行了非定常模拟。该流场具有大范围分离和高度非定常尾迹的特点。在非定常雷诺平均Navier-Stokes和延迟分离涡模拟中，在网格尾流区嵌入了高分辨率的六面体块来提高湍流的分辨率。风洞中发生的模型变形被纳入到计算设置中。计算流体力学预测与风洞测量的力和机翼压力非常吻合。由时间分辨粒子图像测速仪测量的尾迹中的平均和起伏数据与延迟分离的涡旋相匹配。
Following the completion of the European Strategic Wind Tunnel Improved Research Potential test campaign in the European Transonic Windtunnel, a large amount of data exists for comparison and validation of computational results at high Reynolds numbers. Unsteady simulations were performed using the NASA Common Research Model at a low-speed stall condition. The flowfield is characterized by large scale separation and a highly unsteady wake. An embedded high-resolution hexahedron block in the wake region of the grid has been used to improve resolution of the turbulence in unsteady Reynolds-Averaged Navier–Stokes and delayed detached eddy simulations. Model deformation occurring in the wind tunnel was incorporated into the computational setup. The computational fluid dynamics predictions match the force and wing pressure measurements from the wind tunnel very well. The mean and fluctuation data from the time-resolved particle image velocimetry measurements in the wake is matched by the delayed detached eddy ...