Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/37607
Title: Wavelet analysis of memory effects on turbulence structures in a far wake
Authors: Li, H
Zhou, Y
Takei, M
Saito, Y
Horii, K
Keywords: Turbulence
Wakes
Wavelets
Issue Date: 2002
Source: Proceedings of the ASME 2002 Joint U.S.-European Fluids Engineering Division Conference, Montreal, Quebec, Canada, July 14–18, 2002, v. 1, paper no. FEDSM2002-31115, p. 1563-1569 How to cite?
Abstract: Initial condition effects in a self-preserving plane wake were investigated for two wake generators, i.e. a triangular cylinder and a screen of 50% solidity. Two orthogonal arrays of sixteen X-wires, eight in the (x, y)-plane, i.e. the plane of mean shear, and eight in the (x, z)-plane, which is parallel to both the cylinder axis and the streamwise direction, are used to simultaneously obtain velocity data in the experimental investigation. Measurements were made at x/h (x is the streamwise distance downstream of the cylinder and h is the height of the wake generator) = 330 for the triangular cylinder and 220 for the screen. A two-dimensional orthogonal wavelet transform is used to analyze the measured hot-wire data. This technique enables the turbulence structures of various scales to be separated and characterized. Discernible differences are observed between the two wake generators in the turbulence structures of large- down to intermediate-scales. The differences are quantified in terms of the Reynolds shear stress, kinetic energy and root mean square vorticity values.
URI: http://hdl.handle.net/10397/37607
ISBN: 0-7918-3615-0
0-7918-3600-2 (E-ISBN)
DOI: 10.1115/FEDSM2002-31115
Appears in Collections:Conference Paper

Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page view(s)

18
Last Week
0
Last month
Checked on Aug 20, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.