Wind and Structures

  • 제34권1호
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  • Pages.91-100
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  • 2022
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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Numerical studies of unsteady flow field and aerodynamic forces on an oscillating 5:1 rectangular cylinder in a sinusoidal streamwise flow

  • Ma, Ruwei (Research Center for Wind Engineering, Southwest Jiaotong University) ;
  • Zhou, Qiang (Research Center for Wind Engineering, Southwest Jiaotong University) ;
  • Wang, Peiyuan (Research Center for Wind Engineering, Southwest Jiaotong University) ;
  • Yang, Yang (Research Center for Wind Engineering, Southwest Jiaotong University) ;
  • Li, Mingshui (Research Center for Wind Engineering, Southwest Jiaotong University)
  • 투고 : 2019.07.26
  • 심사 : 2020.08.05
  • 발행 : 2022.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Numerical simulations are conducted to investigate the uniform flow (UF) and sinusoidal streamwise flow (SSF) over an oscillating 5:1 rectangular cylinder with harmonic heaving motion at initial angles of attack of α = 0° and 3° using two-dimensional, unsteady Reynolds-averaged Navier-Stokes (URANS) equations. First, the aerodynamic parameters of a stationary 5:1 rectangular cylinder in UF are compared with the previous experimental and numerical data to validate the capability of the computationally efficient two-dimensional URANS simulations. Then, the unsteady flow field and aerodynamic forces of the oscillating 5:1 rectangular cylinder in SSF are analysed and compared with those in UF to explore the effect of SSF on the rectangular cylinder. Results show that the alternative vortex shedding is disturbed by SSF both at α = 0° and 3°, resulting in a considerable decrease in the vortex-induced force, whereas the unsteady lift component induced by cylinder motion remains almost unchanged in the SSF comparing with that in UF. Notably, the strong buffeting forces are observed at α = 3° and the energy associated with unsteady lift is primarily because of the oscillations of SSF. In addition, the components of unsteady lift induced by the coupling effects of SSF and cylinder motion are discussed in detail.

키워드

과제정보

The work was supported by the National Natural Science Foundation of China (Grant No. 52078437, 52008357, 51878580) and Sichuan Science and Technology Plan (No. 2021YJ0075).

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