Wind and Structures

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Aerodynamic characteristics of wavy splitter plate on circular cylinder

  • Liang Gao (School of Civil Engineering and Architecture, Xi'an University of Technology) ;
  • J. Jegadeeshwaran (Turbulence & Flow Control Lab, School of Mechanical Engineering, SASTRA Deemed University) ;
  • S. Ramaswami (Turbulence & Flow Control Lab, School of Mechanical Engineering, SASTRA Deemed University) ;
  • S. B. M. Priya (School of Electrical and Electronics Engineering, SASTRA Deemed University) ;
  • S. Nadaraja Pillai (Turbulence & Flow Control Lab, School of Mechanical Engineering, SASTRA Deemed University)
  • Received : 2023.02.23
  • Accepted : 2023.08.03
  • Published : 2023.11.25
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Abstract

The aerodynamic characteristics of a circular cylinder with a wavy splitter plate were experimentally studied, specifically the potential reduction of drag and fluctuations in drag. To study the individual effects of amplitude and wavelength, the experiments were conducted by varying one parameter at a time while holding the other one constant. To study the effect of amplitude (A), the wavelength to diameter ratio (λ/D) was fixed at 0.115 and the amplitude to diameter ratio (A/D) was varied as 0.005, 0.010, 0.015 and 0.020. Similarly, to study the effect of wavelength, A/D was fixed as 0.020 and λ/D was varied as 0.46, 0.23, 0.15 and 0.12. Analysis of the data indicated that the wavy splitter plate caused a significant reduction in both the magnitude and the fluctuation of drag. The variation of aerodynamic forces and the fluctuations with them corresponding to different Reynolds numbers were computed and the spectral aspects of fluctuating forces due to vortex shedding is analysed and effective reduction in both shedding frequency and magnitude was observed.

Keywords

Acknowledgement

Authors are grateful for the project supported by Natural Science Basic Research Plan in Shaanxi Province of China (Program No. 2022JM-282 & 2018JQ5081) and Natural Science Foundation of Shaanxi Provincial Department of Education (17JK0567).

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