Experimental studies on flow noise interference mechanism of tandem shallow cavities with different spacings at subsonic speeds
文献类型：期刊论文
| 作者 | Lu WS(陆维爽)4; Jiang, Shujie3,4; Qiu, Fusheng2,3; Sun, Yulong3; Zheng GN(郑冠男)1,4; Yang GW(杨国伟)4 |
| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 37期号:7页码:16 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0276445 |
| 通讯作者 | Zheng, Guannan(zhengguannan@imech.ac.cn) |
| 英文摘要 | Regarding the flow noise interference mechanism of tandem shallow cavities, experimental research on the near-field flow field characteristics and far-field acoustic field characteristics of two cavities of the same size along the flow direction in tandem was carried out. The incoming flow velocity was adjusted from 60 to 80 m/s at the intervals of 5 m/s, which corresponded to Reynolds numbers from 6.6 x 10(5) to 8.8 x 10(5). A spacing distance between the tandem cavities is from 0.25 to 4 times the cavity length. The experimental results show that the variations of all the fluctuation characteristics basically occur below 500 Hz, both for the near-field wall pressure and for the far-field acoustic pressure. When the spacing distance is small, the near-field flow characteristics of the upstream cavity change very little, but the low-frequency broadband pressure fluctuation of the downstream cavity is excited; when the spacing distance is large, the low-order flow-acoustic feedback modes of the upstream cavity are excited, and the intensity of pressure fluctuation in the corresponding characteristic frequency as well as the nearby frequency bands increase significantly, while the intensity of pressure fluctuation in the downstream cavity decreases slightly. This leads to a significant increase in the far-field noise of the tandem cavities below 500 Hz, and the increase is larger in the upstream of the tandem-cavity system than in the downstream. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | SELF-SUSTAINED OSCILLATIONS ; SIDE-BRANCHES |
| 资助项目 | National Key Laboratory of Aerodynamic Noise Control of China Aerodynamics research and Development Center[ANCL20230107] ; Key Laboratory of Aerodynamic Noise Control of China Aerodynamics Research and Development Center |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001534572800021 |
| 资助机构 | National Key Laboratory of Aerodynamic Noise Control of China Aerodynamics research and Development Center ; Key Laboratory of Aerodynamic Noise Control of China Aerodynamics Research and Development Center |
| 其他责任者 | 郑冠男 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/102295]  |
| 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.Univ Chinese Acad Sci, Sch Engn, Beijing 100191, Peoples R China 2.Sun Yat Sen Univ, Sch Aeronaut & Astronaut, Guangzhou 510275, Guangdong, Peoples R China; 3.State Key Lab Aerodynam, Mianyang 621000, Sichuan, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Lu WS,Jiang, Shujie,Qiu, Fusheng,et al. Experimental studies on flow noise interference mechanism of tandem shallow cavities with different spacings at subsonic speeds[J]. PHYSICS OF FLUIDS,2025,37(7):16. |
| APA | 陆维爽,Jiang, Shujie,Qiu, Fusheng,Sun, Yulong,郑冠男,&杨国伟.(2025).Experimental studies on flow noise interference mechanism of tandem shallow cavities with different spacings at subsonic speeds.PHYSICS OF FLUIDS,37(7),16. |
| MLA | 陆维爽,et al."Experimental studies on flow noise interference mechanism of tandem shallow cavities with different spacings at subsonic speeds".PHYSICS OF FLUIDS 37.7(2025):16. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。