Experimental Study on Noise Reduction through Trailing Edge Brushes
Experimental Study on Noise Reduction through Trailing Edge Brushes
复制标题
后缘电刷降噪实验研究
DOI：
10.1007/978-3-540-33287-9_45
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发表时间：
2006
影响因子：
2.2
通讯作者：
M. Herr
中科院分区：
文献类型：
--
作者：
M. Herr
在布伦瑞克气动声学风洞（AWB）进行了尾缘降噪实验研究，考察了尾缘刷装置的声学和气动效应。在零升力通用板模型（Re = 2.1至7.9 x 106）上进行定向麦克风和热线测量。测试了不同的刷概念，以澄清设计参数与随后的气动声学性能之间的函数关系。这项正在进行的工作的第一个结果表明，显著的源噪声降低超过10 dB，从而揭示了两种相关的降噪机制。除了宽频带湍流边界层后缘噪声外，边缘涡脱落的窄频带贡献也得到了缓解。
Within an experimental trailing edge noise reduction study in the Aeroacoustic Wind Tunnel Braunschweig (AWB) both acoustic and aerodynamic effects of trailing edge brush devices were examined. Directional microphone and hot wire measurements were undertaken on a zero-lift generic plate model (Re = 2.1 to 7.9 x 106). Various brush concepts were tested to clarify the functional relationship between design parameters and the ensuing aeroacoustic properties. First results of this ongoing work indicate a significant source noise reduction in excess of 10 dB, thereby revealing two relevant noise reduction mechanisms. In addition to broadband turbulent boundary layer trailing edge noise also narrow band contributions due to vortex shedding from the edge were alleviated.