A High-Speed PIV Study on Trailing-Edge Noise Sources

A High-Speed PIV Study on Trailing-Edge Noise Sources
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关于后沿噪声源的高速 PIV 研究

DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Thomas Lauke
Thomas Lauke
中科院分区：
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文献类型：
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作者：
A. Schröder;U. Dierksheide;M. Herr;Thomas Lauke

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机体噪声本质上是由于非定常流，主要是湍流与飞机结构的相互作用，特别是由旋涡引起的
Airframe noise is essentially due to the interaction of unsteady, mostly turbulent flow with the structure of the airplane, particularly caused by vortical flows around edges or over open cavities. A classical problem in this field is the trailing edge noise, which involves different noise generating mechanisms. Extensive investigations have been conducted on airfoil- and on flat plate trailing edges. According to [380, 381, 382] the major noise contribution is provided by the span-wise component of vorticity, the corresponding dipole (”principal edge noise dipole”) is the sc. perturbed Lamb vector being perpendicular to the plane of the plate. A numerical simulation of trailing edge noise can be performed, based on such HS-PIV input data.