| 张雪,陈宝,卢清华.Amiet剪切层理论的角度折射验证研究[J].,2014,33(5):433-438 |
| Amiet剪切层理论的角度折射验证研究 |
| Verification of angle refraction correction based on Amiet’s shear layer theory |
| 投稿时间：2013-07-18 修订日期：2014-08-21 |
| 中文摘要: |
| 在开口射流风洞中进行气动噪声的定位测量试验时，射流边界的剪切层会对声传播产生折射影响，在处理过程中需要对传声器测量的信号进行剪切层修正，修正结果将直接影响到波束形成对气动噪声源定位的准确性。本文针对经典的Amiet剪切层修正理论，综合CAA数值计算与试验测试，对该理论进行了验证，研究表明CAA计算与Amiet理论吻合，Amiet理论能够有效修正剪切层对声波的角度折射影响。 |
| 英文摘要: |
| Aeroacoustic location measurements in open jet wind tunnel, the shear layer at jet boundary will cause the sound refraction effects. The measured signals by microphones need to be corrected in the process. The correction results directly affect the accuracy of beamforming. In terms of Amiet's sheay layer theory, this paper validated the classical theory combining CAA with test. Study shows that Amiet's theoretical coincides to the CAA calculation and could be effectively corrected the angle of refraction effects on acoustic |
| DOI：10.11684/j.issn.1000-310X.2014.05.009 |
| 中文关键词: 声折射,剪切层,气动噪声,开口风洞 |
| 英文关键词: Refraction of sound,Shear layer,Aeroacoustic,Open jet wind tunnel |
| 基金项目: |
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