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首页> 外文会议>AIAA/CEAS aeroacoustics conference >Experimental Study of Slat Noise from 30P30N Three-Element High-Lift Airfoil in JAXA Kevlar-Wall Low-Speed Wind Tunnel
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Experimental Study of Slat Noise from 30P30N Three-Element High-Lift Airfoil in JAXA Kevlar-Wall Low-Speed Wind Tunnel

机译：雅克凯夫拉墙低速风洞30P30N三元高升降机翼型板块噪声的实验研究

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摘要

Aeroacoustic measurements associated with noise radiation from the leading-edge slat of the canonical, unswept 30P30N three-element high-lift airfoil configuration have been obtained in a 2 m x 2 m Kevlar-wall wind tunnel at the Japan Aerospace Exploration Agency (JAXA). Performed as part of a collaborative effort on airframe noise between JAXA and the National Aeronautics and Space Administration (NASA), the model geometry and majority of instrumentation details are identical to a NASA model with the exception of a larger span. The measurements have been designed to provide an important component of the dataset for Category 7 of the AIAA workshops on Benchmark problems for Airframe Noise Computations (BANC) and, more generally, an improved understanding and characterization of the noise source mechanisms associated with a leading-edge slat. Following the first phase of measurements at the Hard-wall test section in 2013 to obtain reliable near-field data with quasi-two-dimensional near-field characteristics, the second phase of measurements has been performed to obtain more reliable dataset of the acoustic data and the data with higher angles of attack where no significant narrowband peaks (NBPs) are observed in the spectra. The results in the Kevlar-wall wind tunnel exhibit better quantitative surface pressure spectra as well as the acoustic spectra obtained by integrating the noise source maps. The directivity characteristic of acoustic spectra obtained by the phased-microphone array is also shown.
机译：在日本航空航天勘探机构（JAXA）的2米x 2 M Kevlar-Wall风洞中获得了与典型的前沿板的噪声辐射相关的空气声学测量。作为JAXA与美国国家航空航天局（NASA）之间的机身噪声的协作努力的一部分，模型几何和大多数仪器细节与NASA模型相同，除了更大的跨度。该测量旨在提供关于机机噪声计算（BANC）的基准问题的AIAA研讨会的第7类别的数据集的重要组成部分，并且更重要的是，更改进的理解和表征与前导相关联的噪声源机制边板块。在2013年硬墙测试部分的第一阶段进行测量，以获得具有准二维近场特性的可靠近场数据，已经执行了第二阶段的测量阶段以获得更可靠的声学数据集和具有较高角度的数据，在光谱中观察到没有明显的窄带峰（Nbps）。 Kevlar-Wall风洞的结果表现出更好的定量表面压力光谱以及通过积分噪声源图而获得的声光谱。还示出了通过相位麦克风阵列获得的声光谱的方向性特性。

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