Estimating flow-induced noise of a circular cylinder using numerical and analytical acoustic methods

In this paper, the flow-induced noise around the circular cylinder is investigated by using numerical and analytical methods. The steady and transient flow field data required for acoustic analysis are calculated by employing Computational Fluid Dynamics (CFD) using finite volume method. The turbulence is modelled by using the two-equation turbulence models. The flow-induced noise has been calculated by solving Ffowcs Williams and Hawkings (FW-H) equations. A k–ε sound model based on Proudman analogy is also employed to approximate the total sound power and flow noise generated by turbulent flow past over the circular cylinder, analytically. The results obtained using the FW-H and the k–ε sound methods are presented and compared with experimental and numerical data in the literature. The k–ε sound method can predict discrete values of sound pressure levels and has compatible harmonics into the broadband noise, especially. The agreement between the results are found to be good.