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임종수(Jongsoo Im),김창성(Changseong Kim),신동신(Dongshin Shin),노오현(Ohyun Rho),이수갑(Soogab Lee) 한국유체기계학회 1998 유체기계 연구개발 발표회 논문집 Vol.- No.-
Flow field and near-field noise of a centrifugal fan has been studied with an efficient compressible method and STAR-CD. The flow field of the centrifugal fan is assumed two-dimensional. Most of the compressible studies has been done by inviscid solver because viscous simulation shows little difference. The near field noise is estimated in terms of sound pressure level in frequency domain transformed from the computed pressure fluctuations using FFT. The simulation has been done on various design elements such as impeller blade shapes, the number of blades and cut-off clearance. The comparison shows that the number of blades has a significant effect on near-field noise without losing aerodynamic performance.