Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity

doi:10.1016/j.ast.2022.107779

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity
	Lu WS(陆维爽)1,2,3,4; Liu, Peiqing 2,3,4; Guo, Hao 2,3,4
刊名	AEROSPACE SCIENCE AND TECHNOLOGY
	2022-09-01
卷号	128 页码:9
关键词	Krueger flap Storage cavity Aero-acoustic Noise characteristics Band-pass filtering
ISSN号	1270-9638
DOI	10.1016/j.ast.2022.107779
通讯作者	Guo, Hao(guohao@buaa.edu.cn)
英文摘要	With the aim of investigating noise characteristics of tonal noise generated from a Krueger storage cavity, aero-acoustic experiments on a two-dimensional, Krueger flap configuration with an open or closed gap were conducted in the D5 aero-acoustic wind tunnel at Beihang University. The angles of attack are from 4 degrees to 8 degrees, and the free-stream velocities are from 45 m/s to 60 m/s. To study further the noise temporal characteristics and generation mechanism, experimental results were analyzed using a band-pass filtering method. The results show that low-frequency noise generated by the Krueger storage flow is dominant when the Krueger flap is deployed without a gap. For the Krueger configuration with a closed gap, low -frequency multiple tones observed at a free-stream velocity above 45 m/s are generated by self-excited oscillation within the storage cavity. The frequencies corresponding to these tonal noises have an octave relationship and satisfy the Strouhal number related scaling law. Filtering results reveal further that these low-frequency tones are intermittently and alternately excited in time and satisfy the oscillation mode switching mechanism.(c) 2022 Elsevier Masson SAS. All rights reserved.
分类号	一类
资助项目	National Natural Science Foun-dation of China ; [12072016] ; [1217021666] ; [11772033] ; [11721202]
WOS关键词	SELF-EXCITED OSCILLATION ; EDGE SLAT COVE ; UNSTEADY-FLOW ; TONES ; IMPINGEMENT ; LAYER
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000879854200001
资助机构	National Natural Science Foun-dation of China
其他责任者	Guo, Hao
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90765]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China; 3.Beihang Univ, Key Lab Fluid Mech, Minist Educ, Beijing 100191, Peoples R China; 4.Beihang Univ, Key Lab Aeroacoust, Minist Ind & Informat Technol, Beijing 100191, Peoples R China;
推荐引用方式 GB/T 7714	Lu WS,Liu, Peiqing,Guo, Hao. Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2022,128:9.
APA	陆维爽,Liu, Peiqing,&Guo, Hao.(2022).Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity.AEROSPACE SCIENCE AND TECHNOLOGY,128,9.
MLA	陆维爽,et al."Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity".AEROSPACE SCIENCE AND TECHNOLOGY 128(2022):9.