| 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, Peiqing1,2,3; Guo, Hao1,2,3 | |
| Corresponding Author | Guo, Hao([email protected]) |
| Source Publication | AEROSPACE SCIENCE AND TECHNOLOGY
 |
| 2022-09-01 | |
| Volume | 128Pages:9 |
| ISSN | 1270-9638 |
| Abstract | 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. |
| Keyword | Krueger flap Storage cavity Aero-acoustic Noise characteristics Band-pass filtering |
| DOI | 10.1016/j.ast.2022.107779 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000879854200001 |
| WOS Keyword | SELF-EXCITED OSCILLATION ; EDGE SLAT COVE ; UNSTEADY-FLOW ; TONES ; IMPINGEMENT ; LAYER |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Aerospace |
| Funding Project | National Natural Science Foun-dation of China ; [12072016] ; [1217021666] ; [11772033] ; [11721202] |
| Funding Organization | National Natural Science Foun-dation of China |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Guo, Hao |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/90766 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Beihang Univ, Key Lab Aeroacoust, Minist Ind & Informat Technol, Beijing 100191, Peoples R China; 2.Beihang Univ, Key Lab Fluid Mech, Minist Educ, Beijing 100191, Peoples R China; 3.Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation 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.Rp_Au:Guo, Hao |
| 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. |
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| Jp2022FA178_2022_Ban（1786KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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