Experimental investigation of the micro-ramp based shock wave and turbulent boundary layer interaction control

Experimental investigation of the micro-ramp based shock wave and turbulent boundary layer interaction control
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基于微斜坡的激波与湍流边界层相互作用控制的实验研究

DOI:
10.1063/1.4719146
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发表时间:
2012-05
期刊:
影响因子:
4.6
通讯作者:
Wang Chao
Wang Chao
中科院分区:
工程技术2区
文献类型:
--
作者:
Wang Bo;Liu Weidong;Zhao Yuxin;Fan Xiaoqiang;Wang Chao

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利用纳米粒子平面激光散射技术和超音速粒子图像测速技术,研究了在马赫数为2.7、雷诺数为Rθ = 5845的低噪声超音速风洞中,微斜坡控制对入射激波和边界层相互作用(SWBLI)的影响。微坡道下游存在高时空分辨率的尾流结构,其复杂的演化过程包括沿流方向反向旋转的涡对和大尺度的发夹状涡,Strouhal数Stδ约为0.5 ~ 0.65。大型构筑物在通过SWBLI区域时仍能存活。反射的冲击波明显被扭曲,并伴有高频波动。微斜坡应用对SWBLI油田的流动模式有明显的影响,这种影响取决于展向位置。激波脚和分离线都表现出相应的波动,与入射气流速度分布的变化相对应。
Using a nanoparticle-based planar laser-scattering technique and supersonic particle image velocimetry, we investigated the effects of micro-ramp control on incident shockwave and boundary-layer interaction (SWBLI) in a low-noise supersonic wind-tunnel with Mach number 2.7 and Reynolds number Rθ = 5845. High spatiotemporal resolution wake structures downstream of the micro-ramps were detected, while a complex evolution process containing a streamwise counter-rotating vortex pair and large-scale hairpin-like vortices with Strouhal number Stδ of about 0.5–0.65 was revealed. The large-scale structures could survive while passing through the SWBLI region. Reflected shockwaves are clearly seen to be distorted accompanied by high-frequency fluctuations. Micro-ramp applications have a distinct influence on flow patterns of the SWBLI field that vary depending on spanwise locations. Both the shock foot and separation line exhibit undulations corresponding with modifications of the velocity distribution of the inco...
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