Physical mechanisms and performance of slitted leading-edge profiles for the reduction of broadband aerofoil interaction noise
Physical mechanisms and performance of slitted leading-edge profiles for the reduction of broadband aerofoil interaction noise
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减少宽带翼型相互作用噪声的狭缝前缘轮廓的物理机制和性能
DOI：
10.1016/j.jsv.2020.115214
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发表时间：
2020
影响因子：
4.7
通讯作者：
P. Chaitanya
中科院分区：
文献类型：
--
作者：
M. Cannard;P. Joseph;J. Turner;J. Kim;P. Chaitanya
机翼湍流相互作用 (ATI) 噪声是一种由湍流撞击机翼前缘而产生的无粘现象。本文讨论了一种新颖的前沿锯齿几何结构，由窄缝组成，可降低 ATI 噪声。最近发现这些轮廓比传统的前缘几何形状具有明显更好的降噪效果。对其降噪机制和性能进行了数值和分析研究。远场辐射被证明受到影响平板上源分布的感应涡流系统以及狭缝两端产生的两个源之间的相消干涉的影响。开发了一个简单的双源模型来预测获得的远场降噪效果并与直前缘翼型进行比较。
Aerofoil Turbulence Interaction (ATI) noise is an inviscid phenomenon generated by the impingement of turbulent flows onto the leading-edge of an aerofoil. This paper deals with a novel leading-edge serration geometry, composed of narrow slits, to reduce ATI noise. These profiles have been recently found to provide significantly better noise reductions than conventional leading edge geometries. A numerical and analytic investigation is performed into the mechanism and performance of its noise reduction. The far-field radiation is shown to be influenced by a system of induced vortices affecting the distribution of sources on the flat-plate and by destructive interference between the two sources generated at both ends of the slit. A simple two-source model is developed to predict the far-field noise reduction obtained and compared to straight leading-edge aerofoils.
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降低翼型前沿噪声的分析解决方案
DOI：
10.2514/6.2018-3284
发表时间：
2018
期刊：
--
影响因子：
--
作者：
Ayton L
通讯作者：
Ayton L
用于降低机翼相互作用噪音的前沿型材
影响因子：
2.5
作者：
Chaitanya P
通讯作者：
Chaitanya P
DOI：
10.1016/j.jcp.2015.01.039
发表时间：
2015-04
期刊：
J. Comput. Phys.
影响因子：
--
作者：
J. Kim;S. Haeri
通讯作者：
J. Kim;S. Haeri
影响因子：
4.7
作者：
Lau, Alex S. H.;Haeri, Sina;Kim, Jae Wook
通讯作者：
Kim, Jae Wook