首页> 外文会议>41st AIAA fluid dynamics conference and exhibit 2011 >Experiments on the Influence of a Microramp Array on a Hypersonic Shock Turbulent Boundary Layer Interaction
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Experiments on the Influence of a Microramp Array on a Hypersonic Shock Turbulent Boundary Layer Interaction

机译:微斜坡阵列对高超音速冲击湍流边界层相互作用的影响的实验

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Experiments were performed to study the effects of an array of microramp sub-boundary layer vortex generators on a hypersonic shock/turbulent boundary layer interaction. First the interaction between the turbulent boundary layer over a smooth plate and the oblique shock wave generated at a 33° compression corner was investigated in a Mach 7.2 flow. Then two staggered rows of microramps were installed upstream of the interaction region, and the influence of these vortex generators on the flow field and the separation region in particular was studied. Mean flow surveys and turbulence measurements were performed using Particle Image Velocimetry (PIV). The microramps strongly altered the flow field, decreasing the mean velocity at the spanwise locations downstream of the microramp vertices, and increasing it at the spanwise locations in between vertices. The previously two-dimensional interaction region with a large separated zone in the vicinity of the ramp corner is broken up into a three-dimensional interaction, where separation is diminished at the spanwise positions in between the microramp vertices, but increased downstream of the vertices.
机译:进行实验以研究微斜坡次边界层涡流发生器阵列对高超音速冲击/湍流边界层相互作用的影响。首先,在7.2马赫流中研究了光滑板上的湍流边界层与在33°压缩角处产生的倾斜冲击波之间的相互作用。然后在相互作用区域的上游安装了两排交错的微斜坡,并研究了这些涡流发生器对流场和分离区域的影响。使用粒子图像测速(PIV)进行平均流量调查和湍流测量。微斜坡强烈改变了流场,降低了微斜坡顶点下游的展向位置处的平均速度,并在顶点之间的展向位置处增大了平均速度。在斜坡拐角附近具有较大分离区域的先前的二维交互作用区域被分解为三维交互作用,其中在微斜坡顶点之间的展向位置上的间隔减小,但在顶点下游增加。

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