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首页> 外文会议>International Congress and Exposition on Noise Control Engineering >Experimental Investigation of an Under-expanded Single Stream Jet Interacting with a Tangential Flat Plate: Flow Visualizations and Wall Pressure Statistics
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Experimental Investigation of an Under-expanded Single Stream Jet Interacting with a Tangential Flat Plate: Flow Visualizations and Wall Pressure Statistics

机译：膨胀不足的单流射流与切向平板相互作用的实验研究：流动可视化和壁压统计

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This paper is devoted to the experimental study of a circular converging nozzle in under-expanded conditions interacting with a tangential flat plate. Measurements were carried out in the semi-anechoic chamber of the Fluid Dynamic laboratory at the University Roma Tre. Wall pressure fluctuations are acquired by means of flush mounted Kulite sensors displaced at several streamwise positions. Qualitative flow visualizations are obtained as well, through the Background Oriented Schlieren technique that provides density gradient fields integrated along the optical path. A parametric study is carried out in terms of jet/plate distance and nozzle pressure ratio. The investigation provides, for the first time, a detailed characterization of the wall pressure statistics also correlating the achieved statistics with the shock cell structure.
机译：本文致力于圆形膨胀喷嘴在膨胀条件下与切向平板相互作用的实验研究。在Roma Tre大学的流体动力学实验室的半消声室中进行测量。壁面压力波动是通过在多个水流位置位移的齐平安装的Kulite传感器获得的。通过背景导向的Schlieren技术也可以获得定性流动可视化，该技术提供了沿光路集成的密度梯度场。根据射流/平板距离和喷嘴压力比进行了参数研究。该研究首次提供了壁压统计数据的详细特征，也将获得的统计数据与激波单元结构相关联。

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