Noise suppression mechanism of flow in annular cavity using annular groove at subsonic speeds
文献类型：期刊论文
| 作者 | Lu WS(陆维爽)2; Zheng GN(郑冠男)1,2 |
| 刊名 | JOURNAL OF VIBRATION AND CONTROL
 |
| 出版日期 | 2025-08-08 |
| 页码 | 18 |
| 关键词 | Cavity noise noise reduction passive control flow-acoustic feedback acoustic resonance |
| ISSN号 | 1077-5463 |
| DOI | 10.1177/10775463251355441 |
| 通讯作者 | Zheng, Guannan(zhengguannan@imech.ac.cn) |
| 英文摘要 | To investigate the mechanism of noise reduction of landing gear hubs, the noise suppression effect and mechanism of an annular groove (simplification of an annular wheel hub rim) on an annular cavity (simplification of an annular wheel hub) have been studied computationally using the Detached Eddy Simulation method combined with the Ffowcs Williams-Hawkings acoustic analogy in this paper. The Mach number of the freestream is from 0.13 to 0.21. The results demonstrated that the annular groove alters the boundary layer profile in the vicinity of the annular cavity. This causes the kinetic energy within the boundary layer to move towards the upper boundary layer, the boundary layer displacement thickness to increase, and the flow mass loss to increase. Concurrently, the annular groove results in a reduction in shear layer flow velocity, thereby weakening the interaction of the flow with the center cylinder (simplification of a wheel axle), the rear-edge and the internal wall of the annular cavity, reducing the velocity fluctuation and the turbulent kinetic energy near the annular cavity walls. This suppresses the intensity of flow-acoustic feedback noise, while simultaneously suppresses the intensity of both the acoustic feedback noise and the turbulent broadband noise. |
| 分类号 | 二类 |
| WOS关键词 | OSCILLATIONS |
| 资助项目 | Chinese Academy of Sciences[E2XM0404] ; Laboratory of Aerodynamic Noise Control of China Aerodynamics Research and Development Center[ANCL20230107] |
| WOS研究方向 | Acoustics ; Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001545977300001 |
| 资助机构 | Chinese Academy of Sciences ; 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/311007/102205]  |
| 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, Peoples R China 2.Chinese Acad Sci, Inst Mech, 15,North 4th Ring West Rd, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Lu WS,Zheng GN. Noise suppression mechanism of flow in annular cavity using annular groove at subsonic speeds[J]. JOURNAL OF VIBRATION AND CONTROL,2025:18. |
| APA | 陆维爽,&郑冠男.(2025).Noise suppression mechanism of flow in annular cavity using annular groove at subsonic speeds.JOURNAL OF VIBRATION AND CONTROL,18. |
| MLA | 陆维爽,et al."Noise suppression mechanism of flow in annular cavity using annular groove at subsonic speeds".JOURNAL OF VIBRATION AND CONTROL (2025):18. |
入库方式： OAI收割
来源：力学研究所
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