Experimental study on spectrum and multi-scale nature of wall pressure and velocity in turbulent boundary layer

doi:10.1088/1674-1056/24/6/064702

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	Experimental study on spectrum and multi-scale nature of wall pressure and velocity in turbulent boundary layer
	Zheng Xiao-Bo 1; Jiang Nan1,2,3 ; Jiang, N (reprint author), Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China.
发表期刊	CHINESE PHYSICS B
	2015-06-01
卷号	24 期号:6 页码:64702
ISSN	1674-1056
摘要	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.
关键词	Multi-scale Coherent Structures Hot Wire Anemometry Microphone Wavelet Transform
学科领域	Physics
DOI	10.1088/1674-1056/24/6/064702
URL	查看原文
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:000358130200042
关键词[WOS]	HIGH-REYNOLDS-NUMBER ; WAVELET REPRESENTATION ; STREAMWISE VORTICES ; SPATIAL-RESOLUTION ; DRAG REDUCTION ; FLUCTUATIONS ; FLOW ; BENEATH ; DECOMPOSITION
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
项目资助者	National Basic Research Program of China [2012CB720101, 2012CB720103] ; National Natural Science Foundation of China [11272233, 11332006, 11411130150]
论文分区	二类/Q2
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/55333
专题	非线性力学国家重点实验室
通讯作者	Jiang, N (reprint author), Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China.
作者单位	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
推荐引用方式 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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