Flow Field Effects of Control on Supersonic Open Cavities
Flow Field Effects of Control on Supersonic Open Cavities
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超声速开腔控制的流场效应
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
L. Cattafesta
中科院分区：
文献类型：
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作者：
Taylor Lusk;J. Dudley;L. Ukeiley;L. Cattafesta
研究了长深比为6的凹腔前缘控制对马赫数为1.4的流动的影响。通过三种不同的前缘缝吹配置来改变流动，这些配置被应用于修改空腔上方的剪切层的特性。表面压力测量和粒子图像测速仪被用来表征流场内部的空腔和剪切层的空腔。结果表明，5槽的配置是最有效的考虑，因为它导致了最显着的抑制波动的表面压力水平的均方根压力水平降低高达44%，最低的质量流量。此外，在受控情况下的流场显示清楚地表明，剪切层被提升出空腔，因此不再撞击后壁。
The effects of leading edge control on Mach 1.4 flow over a length-to-depth ratio 6 cavity are investigated. The flow was altered through three different leading edge slot blowing configurations which were applied to modify the properties of the shear layer above the cavity. Surface pressure measurements and particle image velocimetry were used to characterize the flowfield inside the cavity and in the shear layer over the cavity. The results indicate the 5-slot configuration was the most effective of those considered because it resulted in the most significant suppression of the fluctuating surface pressure levels–up to 44% reduction in root-mean-square pressure levels–with the lowest mass flow. Further, flowfield visualization in the controlled cases clearly shows the shear layer lifted out of the cavity and therefore no longer impinging on the aft wall.