Effects of freestream turbulence on streamwise pressure measured on a square-section cylinder |
| |
| Affiliation: | 1. Centre for Building Studies, Concordia University, 1455 de Maisonneuve Blvd. W, Montreal, Quebec, Canada H3G 1M8;2. Department of Mechanical Engineering, Monash University, Clayton, Vic., Australia;1. Department of Radiology and Radiological Science, The Johns Hopkins Hospital, Baltimore, Maryland;2. CBS News Digital, New York, New York;1. Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Portugal;2. Canal de Experiências Hidrodinâmicas de El Pardo, Madrid, Spain;1. School of Civil Engineering, Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China;2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;1. College of Mechanics and Materials, Hohai University, Nanjing, 210098, PR China;2. School of Aeronautics and Astronautics, Dalian University of Technology, Dalian, 116024, PR China;3. Department of Meteorological Observatory, Quanzhou Meteorological Bureau, Quanzhou, 362000, PR China;4. Faculty of Civil Engineering, University of Zagreb, Zagreb, 10000, Croatia;5. The State Key Laboratory for the Safety and Health of Long-Span Bridges in Service, Jiangsu Transportation Research Institute, Nanjing, 210098, PR China;1. Key Laboratory of New Technology for Construction of Cities in Mountain Area, School of Civil Engineering, Chongqing University, Chongqing, 400045, PR China;2. School of Civil Engineering, State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China |
| |
| Abstract: | Wind tunnel experiments were performed to study the effects of freestream turbulence on the flow around a square cylinder. The results indicate that the pressure fluctuations on streamwise surfaces are produced mainly by periodic vortex shedding when turbulence intensity, σu/U, is less than 12%. As σu/U approaches 20%, vortex shedding weakens significantly and pressure fluctuations occur over a broad range of frequency. Flow visualization experiments show that extreme negative pressure peaks in highly turbulent flow are associated with intermittent reattachment of separated shear layers. The results also show that an increase in turbulence scale causes peak pressure coefficients to increase. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
