Recognition of Tollmien-Schlichting waves excited by acoustic disturbances using discrete wavelet transform
文献类型：期刊论文
| 作者 | Cao, Zhen2,3; Li, Dong2,3; Li, Peifan2,3; Chen, Shusheng2,3; Wang G(王刚)1,3
|
| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 37期号:2页码:13 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0251926 |
| 通讯作者 | Chen, Shusheng(sshengchen@nwpu.edu.cn) |
| 英文摘要 | Localized acoustic receptivity experiments are conducted on a two-dimensional flat plate in a low-turbulence wind tunnel. Discrete wavelet transform (DWT) is employed to detect and identify Stokes waves and Tollmien-Schlichting (T-S) waves within the boundary layer. The effects of disturbance frequency and roughness thickness on the amplitude of T-S waves are examined separately in a low-speed regime. The phase velocities of the T-S waves at each measurement location are validated and found to be in good agreement with theoretical predictions. Additionally, the velocity profiles of both T-S and Stokes waves closely matches those predicted by linear stability theory. Time-frequency analysis of the DWT signals is performed using the short-time Fourier transform, revealing a narrow frequency bandwidth. The error between the peak frequency of the T-S waves and the forcing frequency is found to be less than 5%. Local receptivity coefficients are estimated using an extrapolation method, which shows that at a dimensionless forcing frequency of 79.92, the receptivity growth rate in the streamwise direction is higher compared to that at a dimensionless frequency of 99.90. This novel method offers a more precise recognition of T-S waves, simplifying the measurement process compared to traditional pulsed sound techniques. It eliminates the need for ensemble averaging based on repeated measurements and improves the frequency resolution of the T-S waves. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | BOUNDARY-LAYER RECEPTIVITY ; TRANSITION ; DECOMPOSITION ; SOUND |
| 资助项目 | National Natural Science Foundation of China10.13039/501100001809[92371109] ; National Natural Science Foundation of China10.13039/501100001809[11772260] ; National Natural Science Foundation of China |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001418796100049 |
| 资助机构 | National Natural Science Foundation of China10.13039/501100001809 ; National Natural Science Foundation of China |
| 其他责任者 | Chen, Shusheng |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/100074]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.Natl Key Lab Aircraft Configurat Design, Xian 710072, Peoples R China; 3.Northwestern Polytech Univ, Sch Aeronaut, Xian 710072, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Cao, Zhen,Li, Dong,Li, Peifan,et al. Recognition of Tollmien-Schlichting waves excited by acoustic disturbances using discrete wavelet transform[J]. PHYSICS OF FLUIDS,2025,37(2):13. |
| APA | Cao, Zhen,Li, Dong,Li, Peifan,Chen, Shusheng,&王刚.(2025).Recognition of Tollmien-Schlichting waves excited by acoustic disturbances using discrete wavelet transform.PHYSICS OF FLUIDS,37(2),13. |
| MLA | Cao, Zhen,et al."Recognition of Tollmien-Schlichting waves excited by acoustic disturbances using discrete wavelet transform".PHYSICS OF FLUIDS 37.2(2025):13. |
入库方式： OAI收割
来源：力学研究所
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