DNS of a Large-Domain, Mach 3 Turbulent Boundary Layer: Turbulence Structure
DNS of a Large-Domain, Mach 3 Turbulent Boundary Layer: Turbulence Structure
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大域、马赫 3 湍流边界层的 DNS：湍流结构
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Priebe
中科院分区：
文献类型：
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作者：
I. Beekman;S. Priebe
我们引入2.9马赫，Re？= 640，在一个非常大的区域上进行空间上的直接数值模拟，该区域在流方向上大约有60个来流边界层厚度。使用Xu & Martin的重新缩放技术1，在出口附近的重新缩放平面上，在大约57来流边界层厚度处（入口下游不到0.4米），我们获得了一个干净的流入，即使是最大尺度的采样也很好。我们表明，模拟可以长时间运行，450‐/U1，而不需要在自由流中施加人工声学模式。我们继续通过光谱分析和过滤瞬时流场来研究湍流结构。特别关注最大的结构，湍流建模，特别是可压缩边界层的独特方面。
We introduce a Mach 2.9, Re? = 640, spatially developing direct numerical simulation on a very large domain which is about 60 incoming boundary layer thicknesses long in the streamwise direction. Using the rescaling technique of Xu & Martin, 1 with the rescaling plane taken near the exit, at about 57 incoming boundary layer thicknesses (just under 0.4 meters downstream of the inlet), we obtain a clean inflow with a good sampling of even the largest scales. We show that the simulation can be run for long times ‚ 450‐/U1 without the forcing of artificial acoustic modes in the free stream. We proceed to examine the turbulence structure through spectral analysis and filtered instantaneous flow fields. Special attention is paid to the largest structures, with turbulence modeling, especially aspects unique to compressible boundary layers, in mind.