Measurement and discovery of shedding vortex noise

被引：0

作者：

Qiao, W.Y. ^{[1
]}

Tang, D.Y. ^{[1
]}

Michel, U. ^{[1
]}

机构：

[1] Northwest Polytechnical Univ., Xi'an 710072, China

来源：

Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University | 2001年 / 19卷 / 02期

关键词：

Acoustic arrays - Acoustic radiators - Aircraft landing - Microphones - Spectrum analysis - Vortex shedding;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The two dimensional mapping of noise sources during a commercial airplane landing was studied. The measurement principle with large planar microphone array and its experimental equipment were presented. A new noise source, shedding vortex noise source, was discovered which is located in the wing near to wing tip. Form the SPL spectrum, it is shown that the noise source is a typical single tone noise source, its frequency increases with increasing airplane speed. The shedding vortex noise source is of obvious directivity. When the radiation angle changes from 60°C to 120°C, SPL of the noise decreases by about 5-8 dB(A).

引用

页码：200 / 204