南方科技大学知识苑(SUSTech KC): Flow and acoustic characterization of turbulence grids at wind tunnel nozzle exit

题名	Flow and acoustic characterization of turbulence grids at wind tunnel nozzle exit
作者	Li，Lin 1 ; Zhu，Haonan 1 ; Maryami，Reza1 ; Zhang，Xianzhi 1; Liu，Yu1,2
通讯作者	Liu，Yu
发表日期	2024-11-10
DOI	10.1016/j.jsv.2024.118535
发表期刊	Journal of Sound and Vibration 影响因子和分区
ISSN	0022-460X
EISSN	1095-8568
卷号	590
摘要	This study investigates the flow and acoustic characteristics of turbulence grids mounted at a wind tunnel nozzle exit, which is crucial for generating essential turbulence in the research of turbulence interaction noise. Diverse grid parameters, including bar diameter, mesh size, solidity, and geometry, were manipulated to measure flow (turbulence intensity, integral length scale, isotropy) and acoustic (grid self-noise, turbulence–airfoil interaction noise) properties. The study reveals that the grids produced turbulence intensity exceeding 3%, showcasing nearly isotropic flow downstream from the grids. Additionally, noise levels were affected by grid parameters, with smaller bar diameters and lower solidities resulting in reduced noise. Notably, bi-planar grids displayed lower noise levels and the absence of tonal peaks compared to single-planar grids. The signal-to-noise ratio of the turbulence interaction noise was also higher for the bi-planar grids. The introduction of acoustic material on the downstream surface of grid bars demonstrated promise in mitigating grid self-noise while preserving turbulence isotropy. These findings provide valuable insights for optimizing grid configurations in turbulence interaction noise research.
关键词	Aeroacoustics Grid self-noise Turbulence grid Turbulence–airfoil interaction noise
相关链接	[Scopus记录]
收录类别	SCI
语种	英语
学校署名	第一 ; 通讯
ESI学科分类	ENGINEERING
Scopus记录号	2-s2.0-85195583722
来源库	Scopus
引用统计
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/778551
专题	工学院_力学与航空航天工程系南方科技大学
作者单位	1.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Guangdong,Shenzhen,518055,China 2.Guangdong Provincial Key Laboratory of Turbulence Research and Applications,Southern University of Science and Technology,Guangdong,Shenzhen,518055,China
第一作者单位	力学与航空航天工程系
通讯作者单位	力学与航空航天工程系; 南方科技大学
第一作者的第一单位	力学与航空航天工程系
推荐引用方式 GB/T 7714	Li，Lin,Zhu，Haonan,Maryami，Reza,et al. Flow and acoustic characterization of turbulence grids at wind tunnel nozzle exit[J]. Journal of Sound and Vibration,2024,590.
APA	Li，Lin,Zhu，Haonan,Maryami，Reza,Zhang，Xianzhi,&Liu，Yu.(2024).Flow and acoustic characterization of turbulence grids at wind tunnel nozzle exit.Journal of Sound and Vibration,590.
MLA	Li，Lin,et al."Flow and acoustic characterization of turbulence grids at wind tunnel nozzle exit".Journal of Sound and Vibration 590(2024).