An experimental investigation into model-scale installed jet–pylon–wing noise
An experimental investigation into model-scale installed jet–pylon–wing noise
复制标题
模型规模安装的喷气-塔-机翼噪声的实验研究
DOI：
10.1017/jfm.2021.831
复制
发表时间：
2021
影响因子：
3.7
通讯作者：
R. Camussi
中科院分区：
文献类型：
--
作者：
S. Meloni;A. Proença;J. Lawrence;R. Camussi
摘要南安普顿大学对一种已安装的喷射式塔翼结构进行了模型尺度试验研究，以研究塔架对噪声产生的影响，并阐明其对脉动壁压荷载的影响。该装置由两个单流喷嘴、一个基线轴对称环形喷嘴和一个部分堵塞的环形塔式喷嘴组成。这些喷嘴首先被隔离测试，然后安装在NACA4415机翼旁边的单一喷嘴-机翼位置。喷流马赫数在$0.5\leq M_{j}\leq 0.8$之间变化，并在静态和飞行环境流动条件下进行测量，直到${M_{f}=0.2}$。用单速度分量热线风速计探头进行了射流流场定标。利用两个微型壁面压力传感器研究了机翼表面的压力场，这两个压力传感器在机翼压力侧内沿流向和跨向平装。一个线性的立交桥麦克风阵列被用来记录辐射到远场的噪声。使用多变量统计在时间域和频域分析了非稳定压力数据，突出了仅在安装情况下塔架的存在所提供的远场噪声降低。此外，塔架后面产生的尾迹场可以显著地修正壁面压力波动，特别是在靠近塔架后缘的流向位置。
Abstract A model-scale experimental investigation of an installed jet–pylon–wing configuration was conducted at the University of Southampton, with the scope to study the effect a pylon has on noise generation and to clarify its impact on the fluctuating wall-pressure load. The set-up consisted of two single-stream nozzles, a baseline axisymmetric annular nozzle and a partially blocked annular pylon nozzle. The nozzles were tested first isolated and then installed next to a NACA4415 aerofoil ‘wing’ at a single nozzle–wing position. The jet Mach number was varied between $0.5 \leq M_{{j}} \leq 0.8$ and measurements were performed both under static and in-flight ambient flow conditions up to ${M_{{f}} = 0.2}$. The jet flow-field qualification was carried out using a single-velocity-component hot-wire anemometer probe. The pressure field on the wing surface was investigated using two miniature wall-pressure transducers that were flush-mounted in the streamwise and spanwise directions within the pressure side of the wing. A linear ‘flyover’ microphone array was used to record the noise radiated to the far field. The unsteady pressure data were analysed in both time and frequency domains using multi-variate statistics, highlighting a far-field noise reduction provided by the presence of the pylon only in the installed case. Furthermore, the wake field generated behind the pylon is seen to significantly modify the wall-pressure fluctuations, particularly at streamwise locations close to the pylon trailing edge.
已安装喷射配置的 GPU CABARET 流量和噪声解决方案
DOI：
10.2514/6.2020-2563
发表时间：
2020
期刊：
--
影响因子：
--
作者：
Markesteijn A
通讯作者：
Markesteijn A