Numerical Investigation of a Simplified Wing–body Junction Flow
Numerical Investigation of a Simplified Wing–body Junction Flow
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DOI：
10.1080/10618562.2022.2162892
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发表时间：
2022-09
影响因子：
1.3
通讯作者：
Zi-Qiao Wei;J. Li;Songxiang Tang
中科院分区：
文献类型：
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作者：
Zi-Qiao Wei;J. Li;Songxiang Tang
采用剪切层自适应改进的延迟分离涡模拟（SLA-IDDES）方法模拟了简化翼身结合部的绕流，在边界区域采用了适当的亚网格尺度，以防止亚网格尺度涡粘性的过度产生。数值计算结果与Ölçmen和Simpson的实验结果基本吻合。对马蹄涡在两种流动模式之间的自诱导混沌切换进行了模拟和分析，并研究了其对涡腿及其固有振荡的影响。发现角涡也呈现出与马蹄涡基本相同频率的交替形成和破裂过程。角分离被发现也受到影响的上游马蹄涡和固有的振荡的涡腿。
The flow past a simplified wing-body junction configuration is simulated using a shear layer adaptive improved delayed detached-eddy-simulation (SLA-IDDES) approach in which an appropriate subgrid lengthscale is adopted in the boundary region, where the grid may be strongly anisotropic, to prevent the excessive generation of subgrid-scale eddy viscosity. The numerical results show overall good agreement with the experiment carried out by Ölçmen and Simpson. The self-induced chaotic switching of the horseshoe vortex between two flow modes is simulated and analysed, and its effects on the vortex legs and their inherent oscillation are also investigated. It is found that the corner vortex also exhibits an alternating formation and breakdown process with basically the same frequency as the horseshoe vortex. Corner separation is found to be affected also by the upstream horseshoe vortex and the inherent oscillation of the vortex legs.