Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack
In the present study, multiple-fan active control wind tunnel tests are conducted to investigate the aerodynamic forces on a 5:1 rectangular cylinder in sinusoidal streamwise winds with different angles of attack (AoA). The effects of the frequency, amplitude, and AoA of the sinusoidal flow on the s...
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MDPI AG
2022-07-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/12/7/1033 |
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| author | Bo Wu Jianting Zhou Jingzhou Xin Hong Zhang Liangliang Zhang Xianyi Yang |
| author_facet | Bo Wu Jianting Zhou Jingzhou Xin Hong Zhang Liangliang Zhang Xianyi Yang |
| author_sort | Bo Wu |
| collection | DOAJ |
| description | In the present study, multiple-fan active control wind tunnel tests are conducted to investigate the aerodynamic forces on a 5:1 rectangular cylinder in sinusoidal streamwise winds with different angles of attack (AoA). The effects of the frequency, amplitude, and AoA of the sinusoidal flow on the statistical parameters, spectral characteristics, and spanwise distributions of drag, lift, and moment coefficients are analyzed. Results show that each force has two components: the one induced by the approaching velocity oscillation and the one induced by wake vortex-shedding—this is quite different from that in the smooth flows, where the fluctuating forces are totally due to wake vortex-shedding. For each force, changes of the two components and their relationship with the frequency, amplitude, and AoA are presented. The drag fluctuations are generally dominated by the approaching velocity oscillations, whereas the lift and moment are more sensitive to wake vortex-shedding. Therefore, the drag force has better spanwise correlations than the lift and moment forces. Meanwhile, at a non-zero AoA, the inflow amplitude has different effects on the vortex-shedding-induced component as that at a zero AoA. The differences of spanwise distributions between the sinusoidal flow cases and the smooth flow cases are analyzed. |
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| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T10:21:24Z |
| publishDate | 2022-07-01 |
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| spelling | doaj.art-964e92628b3b4f2ebb62a95a3397bf722023-12-01T21:58:48ZengMDPI AGBuildings2075-53092022-07-01127103310.3390/buildings12071033Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of AttackBo Wu0Jianting Zhou1Jingzhou Xin2Hong Zhang3Liangliang Zhang4Xianyi Yang5State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaIn the present study, multiple-fan active control wind tunnel tests are conducted to investigate the aerodynamic forces on a 5:1 rectangular cylinder in sinusoidal streamwise winds with different angles of attack (AoA). The effects of the frequency, amplitude, and AoA of the sinusoidal flow on the statistical parameters, spectral characteristics, and spanwise distributions of drag, lift, and moment coefficients are analyzed. Results show that each force has two components: the one induced by the approaching velocity oscillation and the one induced by wake vortex-shedding—this is quite different from that in the smooth flows, where the fluctuating forces are totally due to wake vortex-shedding. For each force, changes of the two components and their relationship with the frequency, amplitude, and AoA are presented. The drag fluctuations are generally dominated by the approaching velocity oscillations, whereas the lift and moment are more sensitive to wake vortex-shedding. Therefore, the drag force has better spanwise correlations than the lift and moment forces. Meanwhile, at a non-zero AoA, the inflow amplitude has different effects on the vortex-shedding-induced component as that at a zero AoA. The differences of spanwise distributions between the sinusoidal flow cases and the smooth flow cases are analyzed.https://www.mdpi.com/2075-5309/12/7/1033bluff-body structuresinusoidal flowfluctuating aerodynamic forcesangle of attackmultiple-fan active control wind tunnelBARC benchmark |
| spellingShingle | Bo Wu Jianting Zhou Jingzhou Xin Hong Zhang Liangliang Zhang Xianyi Yang Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack Buildings bluff-body structure sinusoidal flow fluctuating aerodynamic forces angle of attack multiple-fan active control wind tunnel BARC benchmark |
| title | Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack |
| title_full | Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack |
| title_fullStr | Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack |
| title_full_unstemmed | Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack |
| title_short | Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack |
| title_sort | aerodynamic forces on a bluff cylinder in sinusoidal streamwise winds with different angles of attack |
| topic | bluff-body structure sinusoidal flow fluctuating aerodynamic forces angle of attack multiple-fan active control wind tunnel BARC benchmark |
| url | https://www.mdpi.com/2075-5309/12/7/1033 |
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