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- Title
Conditional Averaging of TR-PIV Measurements of Wake Behind Square Cylinder Using an Improved Cross-Correlation Approach.
- Authors
Yu, Jun; Shi, Liu-liu; Wang, Wei-zhe; Liu, Ying-zheng
- Abstract
An improved phase averaging method based on cross-correlation of the instantaneous velocity field determined by TR-PIV measurements is proposed in this article. A Time-Resolved Particle Image Velocimetry (TR-PIV) is used to measure the two-dimensional wake behind the square cylinder. The phase signals associated with the deterministic appearance of the Karman vortex street are obtained by calculating the correlation matrix of the low-pass filtered velocity field, and can provide the complete information of the phase-averaged wake flow. The results show the advantages of the enhanced methodology in extracting the quasi-periodic flow patterns related to the shedding coherent structures without using additional reference signals.
- Publication
Journal of Hydrodynamics, 2010, Vol 22, Issue 1, p29
- ISSN
1001-6058
- Publication type
Article
- DOI
10.1016/S1001-6058(09)60024-X