Experimental study on spectrum and multi-scale nature of wall pressure and velocity in turbulent boundary layer | |
Zheng Xiao-Bo1; Jiang Nan1,2,3; Jiang, N (reprint author), Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China. | |
Source Publication | CHINESE PHYSICS B |
2015-06-01 | |
Volume | 24Issue:6Pages:64702 |
ISSN | 1674-1056 |
Abstract | When using a miniature single sensor boundary layer probe, the time sequences of the stream-wise velocity in the turbulent boundary layer (TBL) are measured by using a hot wire anemometer. Beneath the fully developed TBL, the wall pressure fluctuations are attained by a microphone mechanism with high spatial resolution. Analysis on the statistic and spectrum properties of velocity and wall pressure reveals the relationship between the wall pressure fluctuation and the energy-containing structure in the buffer layer of the TBL. Wavelet transform shows the multi-scale natures of coherent structures contained in both signals of velocity and pressure. The most intermittent wall pressure scale is associated with the coherent structure in the buffer layer. Meanwhile the most energetic scale of velocity fluctuation at y(+) = 14 provides a specific frequency f(9) approximate to 147 Hz for wall actuating control with Re-tau = 996.; When using a miniature single sensor boundary layer probe, the time sequences of the stream-wise velocity in the turbulent boundary layer (TBL) are measured by using a hot wire anemometer. Beneath the fully developed TBL, the wall pressure fluctuations are attained by a microphone mechanism with high spatial resolution. Analysis on the statistic and spectrum properties of velocity and wall pressure reveals the relationship between the wall pressure fluctuation and the energy-containing structure in the buffer layer of the TBL. Wavelet transform shows the multi-scale natures of coherent structures contained in both signals of velocity and pressure. The most intermittent wall pressure scale is associated with the coherent structure in the buffer layer. Meanwhile the most energetic scale of velocity fluctuation at y(+) = 14 provides a specific frequency f(9) approximate to 147 Hz for wall actuating control with Re-tau = 996. |
Keyword | Multi-scale Coherent Structures Hot Wire Anemometry Microphone Wavelet Transform |
Subject Area | Physics |
DOI | 10.1088/1674-1056/24/6/064702 |
URL | 查看原文 |
Indexed By | SCI ; EI ; CSCD |
Language | 英语 |
WOS ID | WOS:000358130200042 |
WOS Keyword | HIGH-REYNOLDS-NUMBER ; WAVELET REPRESENTATION ; STREAMWISE VORTICES ; SPATIAL-RESOLUTION ; DRAG REDUCTION ; FLUCTUATIONS ; FLOW ; BENEATH ; DECOMPOSITION |
WOS Research Area | Physics |
WOS Subject | Physics, Multidisciplinary |
Funding Organization | National Basic Research Program of China [2012CB720101, 2012CB720103] ; National Natural Science Foundation of China [11272233, 11332006, 11411130150] |
Classification | 二类/Q2 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/55333 |
Collection | 非线性力学国家重点实验室 |
Corresponding Author | Jiang, N (reprint author), Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China. |
Affiliation | 1.Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China 2.Tianjin Key Lab Modern Engn Mech, Tianjin 300072, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
Recommended Citation GB/T 7714 | Zheng Xiao-Bo,Jiang Nan,Jiang, N . Experimental study on spectrum and multi-scale nature of wall pressure and velocity in turbulent boundary layer[J]. CHINESE PHYSICS B,2015,24,6,:64702. |
APA | Zheng Xiao-Bo,Jiang Nan,&Jiang, N .(2015).Experimental study on spectrum and multi-scale nature of wall pressure and velocity in turbulent boundary layer.CHINESE PHYSICS B,24(6),64702. |
MLA | Zheng Xiao-Bo,et al."Experimental study on spectrum and multi-scale nature of wall pressure and velocity in turbulent boundary layer".CHINESE PHYSICS B 24.6(2015):64702. |
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