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http://dx.doi.org/10.5293/KFMA.2010.13.3.005

A Basic Study on the Aero-acoustic Noise Characteristics around a Circular Cylinder using the Large Eddy Simulation  

Mo, Jang-Oh (한국해양대학교 해양에너지 전문인력양성사업단)
Lee, Young-Ho (한국해양대학교 기계.정보공학부)
Publication Information
The KSFM Journal of Fluid Machinery / v.13, no.3, 2010 , pp. 5-11 More about this Journal
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.
Keywords
Large Eddy Simulation(LES); Aero-acoustic Noise; Strouhal Number; Ffowcs-Williams and Hawkings Model;
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