Incompressible flow calculations of blunt leading edge separation for a 53 degree swept diamond wing (Invited)
Incompressible flow calculations of blunt leading edge separation for a 53 degree swept diamond wing (Invited)
复制标题
53度后掠菱形翼钝前缘分离的不可压缩流动计算（特邀）
DOI：
10.2514/6.2015-0065
复制
发表时间：
2015
影响因子：
2.2
通讯作者：
S. Toxopeus
中科院分区：
文献类型：
--
作者：
M. Visonneau;E. Guilmineau;S. Toxopeus
模拟空气动力学流动的挑战之一是准确预测分离的开始和发展。在早期的STO研究中，人们发现，由于分离区预测位置的不同，在攻角下对三维翼型的各种预测显示出不同的俯仰力矩。因此，在NATO STO AVT-183研究小组内研制了一种菱形机翼，以分离钝前缘分离并了解其物理机制。在本文中，两个粘性流动求解器专用于流体动力学应用程序被用来预测绕菱形翼的流动。这两个代码解决不可压缩流使用非结构化网格和有限体积离散。结果包括不同的网格设置，有/没有佩尼切和不同的湍流模型，从各向同性或各向异性的统计湍流封闭混合LES湍流模型。此外，所发挥的作用的离散化误差进行评估，通过使用各向异性的自动网格细化程序的基础上流相关的标准。进行了详细的讨论，突出的相似性和差异的结果，建模和离散化误差的各自的影响，并显示潜在的CFD工具来预测所考虑的流的类型。
One of the challenges in simulating aerodynamic flows is the accurate prediction of onset and progression of separation. In earlier STO research, it was found that various predictions for three-dimensional airfoils at angle of attack showed different pitch moments due to differences in the predicted location of separation areas. Therefore, a diamond shaped wing was developed within the NATO STO AVT-183 research group, to isolate the blunt leading edge separation and understand the underlying physical mechanisms. In the present paper, two viscous-flow solvers dedicated to hydrodynamic applications are used to predict the flow around the diamond wing. Both codes solve the incompressible flow using unstructured grids and finite volume discretisation. The results comprise different grid set-ups, with/without peniche and different turbulence models ranging from isotropic or anisotropic statistical turbulence closures to hybrid LES turbulence models. Moreover, the role played by the discretisation error is assessed by using anisotropic automatic grid refinement procedures based on flow-related criteria. A detailed discussion is made, highlighting the similarities and differences of the results, the respective influence of modeling and discretisation errors and showing the potential of CFD tools to predict the type of flow under consideration.