Application of Wavenumber-frequency Method for Characteristic Frequency Prediction of Cavity Noise at Subsonic Speeds
文献类型：期刊论文
| 作者 | Lu WS(陆维爽); Wei L; Wang Y; Yang GW(杨国伟) ; Zheng GN(郑冠男); Sun ZX(孙振旭)
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| 刊名 | JOURNAL OF APPLIED FLUID MECHANICS
 |
| 出版日期 | 2024-02-01 |
| 卷号 | 17期号:2页码:370-383 |
| ISSN号 | 1735-3572 |
| 关键词 | Cavity noise Flow-acoustic feedback Wavenumber-frequency analysis Pressure fluctuation Flow instability |
| DOI | 10.47176/jafm.17.02.2081 |
| 通讯作者 | Zheng, G.(zhengguannan@imech.ac.cn) |
| 英文摘要 | Flow-acoustic feedback is one of the main types of noise in a cavity, is caused by the instability of the cavity shear layer and is enhanced through an acoustic -wave feedback mechanism. The flow characteristics of the cavity boundary/shear layer and the characteristic frequencies of the flow-acoustic feedback in the cavities are studied numerically, with aspect ratios ranging from 1/2 to 4/3. The freestream Mach number is equal to 0.11, corresponding to an Re-based cavity length of 2.1x105. Improved Delayed Detached Eddy Simulations combined with Ffowcs Williams-Hawkings acoustic analogy are used to simulate the flow and noise characteristics of the cavities. Auto -correlation analysis of flow field fluctuations is used to establish a link between the boundary/shear layer pressure fluctuations and flow-acoustic feedback noise. For the low aspect ratio cavities investigated in this paper, convection velocities along the shear layer development direction are obtained using wavenumber-frequency analysis. The deeper the cavity, the lower the shear layer flow velocity. Correspondingly, the characteristic frequencies of the narrowband noise generated by the flow-acoustic feedback shift linearly toward the low frequency band as the cavity depth increases. The results of the predicted noise characteristic frequencies obtained using wavenumber-frequency analysis and Rossiter's empirical formula are in agreement with the calculated results. |
| 分类号 | Q4 |
| WOS关键词 | EDDY SIMULATION ; OSCILLATIONS ; TURBULENCE |
| 资助项目 | National Key Research and Development Program[2022YFB2603400] ; Postdoctoral Fund of Chinese Academy of Sciences[E2XM0404] |
| WOS研究方向 | Thermodynamics ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001117853800012 |
| 资助机构 | National Key Research and Development Program ; Postdoctoral Fund of Chinese Academy of Sciences |
| 其他责任者 | Zheng, G. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/94255]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 推荐引用方式 GB/T 7714 | Lu WS,Wei L,Wang Y,et al. Application of Wavenumber-frequency Method for Characteristic Frequency Prediction of Cavity Noise at Subsonic Speeds[J]. JOURNAL OF APPLIED FLUID MECHANICS,2024,17(2):370-383. |
| APA | 陆维爽,Wei L,Wang Y,杨国伟,郑冠男,&孙振旭.(2024).Application of Wavenumber-frequency Method for Characteristic Frequency Prediction of Cavity Noise at Subsonic Speeds.JOURNAL OF APPLIED FLUID MECHANICS,17(2),370-383. |
| MLA | 陆维爽,et al."Application of Wavenumber-frequency Method for Characteristic Frequency Prediction of Cavity Noise at Subsonic Speeds".JOURNAL OF APPLIED FLUID MECHANICS 17.2(2024):370-383. |
入库方式： OAI收割
来源：力学研究所
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