Dependence of flow classification on the Reynolds number for a two-cylinder wake |
| |
| Institution: | 1. Institute for Turbulence-Noise-Vibration Interactions and Control, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China;2. Key Lab of Advanced Manufacturing Technology, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China;3. School of Civil and Resource Engineering, The University of Western Australia, Australia;1. School of Computing, Engineering and Mathematics, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia;2. School of Civil, Environmental and Mining Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;3. Center for Deepwater Engineering, Dalian University of Technology, Dalian 116024, China;1. Institute for Turbulence-Noise-Vibration Interaction and Control, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen Graduate School, Shenzhen, China;2. Key Lab of Advanced Manufacturing Technology, School of Mechanical Engineering and Automation, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, China;1. Department of Civil Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China;2. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China;3. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, No. 800, Dongchuan Road, Shanghai 200240, China;4. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China;5. Department of Aeronautics, Imperial College London, London SW7 2AZ, UK;6. Cullen College of Engineering, University of Houston, Houston, TX 77204, USA |
| |
| Abstract: | This work aims to investigate the dependence of flow classification on the Reynolds number (Re) for the wake of two staggered cylinders. The Re examined ranges from 1.5×103 to 2.0×104. The pitch ratio, P?=P/d examined is 1.2–6.0 (d is the cylinder diameter), and angle (α) is 0–90°, where P is the center-to-center spacing between two cylinders and α is the angle between the incident flow and the line through the cylinder centers. Two single hotwires were used to measure simultaneously the fluctuating streamwise velocities (u) in the vortex streets generated by the two cylinders. The power spectral density functions and the Strouhal numbers were then obtained from the u signals, based on which the flow structure pattern or mode could be determined. Over two hundred configurations of two staggered cylinders have been examined for each Re. It is found that Re has an appreciable effect on the dependence of the flow mode on P? and α. The observation is connected to the Re effect on the generic features of a two-cylinder wake such as flow separation, boundary layer thickness, gap flow deflection and vortex formation length. |
| |
| Keywords: | Two-cylinder wake Vortex shedding Flow classification |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
