Experimental Study of Near Wake of Micro Vortex Generators in Supersonic Flow

Experimental Study of Near Wake of Micro Vortex Generators in Supersonic Flow
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DOI：
10.2514/6.2010-4623
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发表时间：
2010-06
期刊：
--
影响因子：
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通讯作者：
F. Lu;Adam Pierce;Y. Shih
F. Lu;Adam Pierce;Y. Shih
中科院分区：
其他
文献类型：
--
作者：
F. Lu;Adam Pierce;Y. Shih

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详细的纹影和激光光片可视化的近尾微涡发生器（MVG）显示大的结构，是不同于那些未受干扰的湍流边界层。这些结构归因于主尾涡对的快速破裂。击穿被认为是由一个圆柱形的Kelvin-Helmholtz不稳定面引起的。结构似乎是发夹或环状的性质，显示喷发到自由流动，夹带它。
Detailed schlieren and laser lightsheet visualizations of the near wake of micro vortex generator (MVG) revealed large structures that were different from those of the undisturbed turbulent boundary layer. These structures were attributed to the rapid breakdown of the primary trailing vortex pair. The breakdown was thought to arise from a cylindrical Kelvin–Helmholtz-like instability surface. The structures appear to be hairpin or ring-like in nature that showed eruptions into the freestream flow, entraining it.