주거환기용 시로코홴의 공력 및 소음 특성 연구

초록

This paper presents a procedure for the aerodynamic and aeroacoustic characteristics of sirocco fan. For the aerodynamic and aeroacoustic analyses of sirocco fan, three-dimensional steady state and unsteady Reynolds-averaged Navier-Stokes equations are solved with the shear stress transport turbulence model as a turbulence closure model. Flow analyses are performed on a hexahedral grid through a finite-volume solver. The validation of the numerical results is performed through experimental data for the pressure, efficiency and power. The internal flow analyses of sirocco fan are performed in order to understand the unstable flow phenomenon in casing through the wall pressure and internal flow characteristics at each position. As results of these analyses, it is found that the fluctuations of the pressure value and locally concentrated noise sources are observed near the cut-off and expansion region of casing.