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Investigation on the Unsteady Aerodynamic Force on a 3:2 Rectangular Section under Accelerating Airflow

 Investigation on the Unsteady Aerodynamic Force on a 3:2 Rectangular Section under Accelerating Airflow
Auteur(s): , ,
Présenté pendant IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022, publié dans , pp. 758-766
DOI: 10.2749/nanjing.2022.0758
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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 c...
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Détails bibliographiques

Auteur(s): (Department of Bridge Engineering / State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China)
(Department of Bridge Engineering / State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China)
(Department of Bridge Engineering / State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China)
Médium: papier de conférence
Langue(s): anglais
Conférence: IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022
Publié dans:
Page(s): 758-766 Nombre total de pages (du PDF): 9
Page(s): 758-766
Nombre total de pages (du PDF): 9
DOI: 10.2749/nanjing.2022.0758
Abstrait:

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.

Mots-clé:
essai en soufflerie
Copyright: © 2022 International Association for Bridge and Structural Engineering (IABSE)
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