Full-Scale Noise Testing on Airbus Landing Gears in the German-Dutch Wind Tunnel.
Full-Scale Noise Testing on Airbus Landing Gears in the German-Dutch Wind Tunnel.
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在德国-荷兰风洞中对空中客车起落架进行全面噪声测试。
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
H. Buchholz
中科院分区：
文献类型：
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作者：
W. Dobrzynski;H. Buchholz
现代飞机在进场布局中（即缝翼、襟翼和起落架展开时）的声学飞越特征通常由机身噪声贡献主导。为了研究相关的源和辐射特性，在德国-荷兰风洞中进行了机身噪声试验，首次采用了A320飞机的全尺寸起落架。在风速范围为40至78 m/s时，确定了不同齿轮配置（从基本配置开始，随后用流线型整流罩覆盖更多齿轮元件）的远场噪声特性。起落架气动产生的噪声具有宽带特性，其恒定水平（在1/3-Oct.频带内）可达几kHz。因此，一个最重要的结果是起落架噪声根本不是“低频现象”。此外，水平随着流速的6次方而增加。
The acoustic flyover signature of modern aircraft in their approach configuration - i.e. with slats, flaps and gears deployed - are often dominated by airframe noise contributions. To study relevant source and radiation characteristics, airframe noise tests were performed in the German-Dutch Wind Tunnel employing- for the first time ever - full-scale landing gears of an A320 aircraft. Farfield noise characteristics were determined for different gear configurations (starting form the base configuration and subsequently covering ever more gear elements with streamlined fairings) at wind speeds ranging from 40 to 78m/s. Aerodynamically generated noise from landing gears turnes out to be of broadband nature with constant levels (in 1/3-oct. bands) up to several kHz. One most essential result therefore is that landing gear noise, is not at all a "low-frequency phenomenon". Moreover, levels increase with the 6th power of flow velocity.