This work provides an experimental investigation into the interaction between a jet flow and a semi-finite plate parallel to the jet. Wall pressure fluctuations have been measured in a high compressible subsonic regime and for different distances between the jet and the plate trailing edge. The experiment has been carried out in the ISVR anechoic Doak Laboratory at the University of Southampton, using wall pressure transducers flush mounted on the plate surface. Signals were acquired in the stream-wise direction along the jet centreline and in the span-wise direction in a region close to the trailing edge. The radial position of the flat plate was fixed very close to the jet axis to simulate a realistic jet–wing configuration. The plate was moved axially in order to investigate four different jet-trailing edge distances and to include measurements upstream of the nozzle exhaust. The acquired database was analyzed in both the frequency and the time domains providing an extensive statistical characterization in terms of spectral uni– and multi–variate quantities as well as high order statistical moments. A wavelet analysis was performed as well to investigate the time evolution of the wall pressure events.

中文翻译：

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单股射流在半有限板上引起的壁压波动

这项工作提供了对射流和平行于射流的半有限板之间相互作用的实验研究。壁压力波动已在高可压缩亚音速状态下以及射流和板后缘之间的不同距离测量。该实验是在南安普敦大学的 ISVR 消声 Doak 实验室进行的，使用壁压力传感器齐平安装在板表面。在沿喷气中心线的气流方向和靠近后缘区域的展向方向上采集信号。平板的径向位置固定在非常靠近喷气轴的位置，以模拟真实的喷气机翼配置。为了研究四种不同的射流后缘距离并包括喷嘴排气上游的测量，该板被轴向移动。在频域和时域中对获取的数据库进行了分析，提供了在光谱单变量和多变量数量以及高阶统计矩方面的广泛统计特征。还进行了小波分析以研究壁压力事件的时间演变。