Direct numerical simulations were performed of a free shear layer developing downstream from a no-slip splitter plate. The simulation results show that three-dimensional streaky perturbations developing in the boundary layer on the high-speed side of the splitter plate are convected downstream from the trailing edge and influence the development of three-dimensional perturbations in the planar free shear layer. Simulations are performed in which a spanwise-wavy shape is introduced to the trailing edge of the splitter plate to influence the downstream development of the free shear layer. Introduction of the spanwise-waviness to the trailing edge results in significantly earlier small-scale breakdown of the free shear layer.

中文翻译：

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层流平面自由剪切层二次失稳被动受力数值研究

对从无滑移分流板下游形成的自由剪切层进行直接数值模拟。模拟结果表明，分流板高速侧边界层中产生的三维条纹扰动在后缘下游对流，影响平面自由剪切层中三维扰动的产生。进行了模拟，其中在分流板的后缘引入展向波浪形状以影响自由剪切层的下游发展。向后缘引入展向波度会导致自由剪切层更早地发生小规模破裂。