Experimental study on the pressure distribution of a low aspect-ratio circular cylinder and interference effects of a square cylinder in downburst flows

Huang, Hanjie; Yan, Zhitao; Zeng, Yujie; Yue, Tingrui; Yan, Jian-feng; Fu, Heng-ren

doi:10.1007/s40430-021-02943-4

Cited by 2 publications

(1 citation statement)

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“…Unlike the abovementioned airfoil, circular cylinder, square cylinder, and streamlined bridge decks, a lot of bluff structures (for example, building structures) are relevant to wind engineering applications [17,18] that encounter flow separation and reattachment [19]. Among them, the most representative is the rectangular cylinder with a 5:1 chord-todepth ratio, which is the topic of the BARC project (a Benchmark on the Aerodynamics of a Rectangular 5:1 Cylinder) announced by the International Association for Wind Engineering (IAWE).…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack

Zhou

Xin

et al. 2022

Buildings

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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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Section: Introductionmentioning

confidence: 99%