南方科技大学知识苑(SUSTech KC): Flow and aerodynamic noise control of a circular cylinder by local blowing

题名	Flow and aerodynamic noise control of a circular cylinder by local blowing
作者	Maryami, Reza1 ; Arcondoulis, Elias J. G.1,2 ; Liu, Yu1,3
通讯作者	Liu, Yu
发表日期	2024-02-08
DOI	10.1017/jfm.2024.39
发表期刊	JOURNAL OF FLUID MECHANICS 影响因子和分区
ISSN	0022-1120
EISSN	1469-7645
卷号	980
摘要	In this experimental study, the impact of symmetric local blowing on suppressing the vortex-induced noise of a circular cylinder was investigated. A highly instrumented cylinder with pressure taps and a series of blowing chambers was used to inject air along the span (seven times the cylinder diameter) at circumferential angles theta(b) = +/- 41 degrees, +/- 90 degrees and +/- 131 degrees corresponding to the boundary layer, shear layers on the cylinder and separated shear layers, respectively. The investigation aimed to understand the noise reduction mechanism of local blowing by conducting near-field pressure and far-field noise measurements in synchronisation with flow field velocity measurements. Near-field pressure was measured around the circumference of the cylinder using a remote-sensing technique and planar particle image velocimetry was implemented to measure the velocity of the wake flow field at a diameter-based Reynolds number of Re = 7 x 10(4). The results revealed that the interaction of the rolling up separated shear layers, under the influence of high-momentum fluid travelling from the free stream to the wake, induced significant vertical flow movement in the vortex-formation region. This movement led to strong alternating surface pressure fluctuations at the cylinder's shoulders, contributing to the scattering of noise. It was demonstrated that local blowing delayed vortex shedding for all cases, except at theta(b) = +/- 90 degrees, which elongated the shear layers and pushed the high-momentum transfer area farther downstream. The application of local blowing at theta(b) = +/- 41 degrees was particularly effective in increasing the vortex formation size due to reduced entrainment of fluid-bearing vorticity.
关键词	aeroacoustics vortex shedding
相关链接	[来源记录]
收录类别	SCI ; EI
语种	英语
学校署名	第一 ; 通讯
资助项目	National Natural Science Foundation of China["12111530102","12272163"] ; Department of Science and Technology of Guangdong Province[2023B1212060001] ; Natural Science Foundation of Shenzhen Municipality[20220814230752003]
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
WOS记录号	WOS:001157318200001
出版者	CAMBRIDGE UNIV PRESS
ESI学科分类	ENGINEERING
来源库	Web of Science
引用统计	被引频次[WOS]：6
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/789294
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.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Guangdong, Peoples R China 2.Univ Bristol, Sch Civil Aerosp & Design Engn, Bristol BS8 1TR, England 3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Turbulence Res & Applicat, Shenzhen 518055, Guangdong, Peoples R 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	Maryami, Reza,Arcondoulis, Elias J. G.,Liu, Yu. Flow and aerodynamic noise control of a circular cylinder by local blowing[J]. JOURNAL OF FLUID MECHANICS,2024,980.
APA	Maryami, Reza,Arcondoulis, Elias J. G.,&Liu, Yu.(2024).Flow and aerodynamic noise control of a circular cylinder by local blowing.JOURNAL OF FLUID MECHANICS,980.
MLA	Maryami, Reza,et al."Flow and aerodynamic noise control of a circular cylinder by local blowing".JOURNAL OF FLUID MECHANICS 980(2024).