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首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >Open-Type Separation on Delta Wings for Leading-Edge Bluntness
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Open-Type Separation on Delta Wings for Leading-Edge Bluntness

机译：三角翼上的开放式分隔，可实现先进的钝度

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摘要

A numerical simulation was carried out corresponding to recent experiments using delta wings with sharp and blunt leading-edges, which indicates the second primary vortex, at NASA Langley Research Center. However, the experimental data did not reveal the detailed physical phenomena regarding the second primary vortex, because the experiment used only on-the-body-surface data. In the present study, the physical phenomena were revealed using Reynolds-averaged Navier-Stokes computations with three one-equation turbulence models on an unstructured hybrid mesh. The adaptive mesh refinement method in the vicinity of the vortex center was also applied to have more mesh resolution. Consequently, the result quantitatively revealed that appropriate modeling regarding turbulent kinematic viscosity was significant. Moreover, the three-dimensional visualization of the computational fluid dynamics results suggested that the second primary vortex was a developing shear layer merging into an open-type separation generated late by the primary vortex.
机译：与最近的实验相对应的数值模拟是在NASA兰利研究中心使用具有锋利而钝的前缘的三角翼完成的，这表明第二个主要涡旋。但是，实验数据并未揭示有关第二个初级涡旋的详细物理现象，因为实验仅使用了体表数据。在本研究中，物理现象是通过在非结构化混合网格上使用雷诺平均Navier-Stokes计算和三个单方程湍流模型揭示的。涡旋中心附近的自适应网格细化方法也被应用以具有更高的网格分辨率。因此，结果定量地表明，关于湍流运动粘度的适当建模是重要的。此外，对计算流体动力学结果的三维可视化表明，第二个初级涡旋是一个发展中的剪切层，合并到该初级涡旋后期产生的开放式分离中。

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