Book chapter
Vortex Formation in the Wake of a Streamwisely Oscillating Cylinder in Steady Flow
Fluid-Structure-Sound Interactions and Control, pp.429-434
Lecture Notes in Mechanical Engineering, Springer Berlin Heidelberg
18/12/2015
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Abstract
This study presents the vortex formation in the wake of a cylinder undergoing streamwise oscillations in steady flow. It is found that the global wake structure possesses a spatial-temporal symmetry over N periods of cylinder oscillation when sub-harmonic synchronizations occur. The sub-harmonic synchronization modes are characterized by shedding of M pairs (1 ≤ M < N) of vortices in N periods of cylinder oscillation. The wake of M/N modes is comprised of vortex groups of M vortices arranged in a similar way to Kármán vortex street. The lift force shows excellent periodicity when lock-on occurs, and presents multiple peaks in its spectrum. The primary flow mechanism responsible for the sub-harmonic lock-on is identified as the interaction of the small sized shear bands induced by the cylinder oscillation with the shear layers induced by the steady flow.
Details
- Title
- Vortex Formation in the Wake of a Streamwisely Oscillating Cylinder in Steady Flow
- Creators
- G. Tang - Dalian University of TechnologyL. Cheng - Dalian UniversityL. Lu - Dalian University of TechnologyM. Zhao - Western Sydney UniversityF. Tong - University of Western AustraliaG. Dong - Dalian University of Technology
- Contributors
- Yu Zhou (Editor of compilation) - Harbin Institute of Technology Shenzhen Graduate SchoolA D Lucey (Editor of compilation) - Curtin UniversityYang Liu (Editor of compilation) - Hong Kong Polytechnic University (The)Lixi Huang (Editor of compilation) - University of Hong Kong
- Publication Details
- Fluid-Structure-Sound Interactions and Control, pp.429-434
- Series
- Lecture Notes in Mechanical Engineering
- Publisher
- Springer Berlin Heidelberg; Berlin, Heidelberg
- Identifiers
- 991013042413602368
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Book chapter