The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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A Basic Study on the Aero-acoustic Noise Characteristics around a Circular Cylinder using the Large Eddy Simulation

대와류모사법을 이용한 원주 주위의 공력소음 특성에 관한 기초연구

  • 모장오 (한국해양대학교 해양에너지 전문인력양성사업단) ;
  • 이영호 (한국해양대학교 기계.정보공학부)
  • Received : 2009.04.10
  • Accepted : 2010.03.30
  • Published : 2010.06.01
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Abstract

As a basic study of the aero-acoustic noise, Large eddy simulations were carried out for a fixed circular cylinder at Renolds number (Re=$9.0\times10^4$) using commercial CFD code, FLUENT. The subgrid-scale turbulent viscosity was modeled by Smagorinsky-Lilly model adapted to structured meshes. The results of analysis showed that time-averaged value, $\bar{C}_D$ is approximately 1.47 which is considerably adjacent with the experimentally measured value of 1.32 in comparison to the values performed by previous researchers. It is observed that there are the very small acoustic pressure fluctuation with the same frequency of the Karman vortex street.

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References

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