Investigation on the Unsteady Aerodynamic Force on a 3:2 Rectangular Section under Accelerating Airflow
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Bibliographic Details
| Author(s): |
Xiuyu Chen
(Department of Bridge Engineering / State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China)
Ledong Zhu (Department of Bridge Engineering / State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China) Zhongxu Tan (Department of Bridge Engineering / State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022 | ||||
| Published in: | IABSE Congress Nanjing 2022 | ||||
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| Page(s): | 758-766 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/nanjing.2022.0758 | ||||
| Abstract: |
Unsteady characteristics of aerodynamic force and wind-induced pressure on a 3:2 rectangular section under accelerating airflow are investigated through wind tunnel experiments. Three aerodynamic coefficients, drag coefficient Cd(t), RMS of lift coefficient Clrms(t), Strouhal number of the rectangular section in the accelerating airflow with or without initial velocity are compared with those of the steady flow. Results show that in the cases of airflow accelerated from the static state, significant unsteady feature appears in all three aerodynamic coefficients, 𝐶𝐶𝑑𝑑(𝑡𝑡) and Clrms(t) decreases and St number increases in the early accelerating stage. For accelerating airflow with an initial velocity, the three aerodynamic characteristics fit well with steady flow values, indicating negligible impact on any of these variables. |
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| Keywords: |
wind tunnel test rectangular section accelerating airflow unsteady aerodynamic force
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| Copyright: | © 2022 International Association for Bridge and Structural Engineering (IABSE) | ||||
| License: | This creative work is copyrighted material and may not be used without explicit approval by the author and/or copyright owner. |
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