불균일 유입유동이 축류팬의 성능 및 소음에 미치는 영향에 대한 실험적 연구

초록

The flow field and noise characteristics from an propeller fan designed previously under non-uniform inlet conditions were measured to reveal the mechanism for tonal radiation. A study was carried out to vary the intensity and orientation of turbulence deliberately generated in the fan inflow using a set of circular rods with non-uniform mean flows. To control the tonal components, wavy-walled inlet guide was deliberately designed and tested under the fore-mentioned non-uniform inflow conditions. The results provide new information and insight into the prediction and control of tonal noise component.