Measurement and analysis of performance and noise from centrifugal blowers

초록

The prediction method of performance and aerodynamic noise form a centrifugal blower called a sirocco fan was developed and verified by measured data. To predict the performance of the sirocco fan, the well-known slip coefficients and various loss models were tested and applied to the forwardcuved sirocco impeller and casing, the predicted performance characteristics were in good agreement with measured ones using an ANSI test plenum. Various scaling models for aerodynamic noise from the sirocco fan were evaluated against measured power levels in terms of the flow coefficient. It was shown that the turbulent broadband sound power form the sirocco fan can be modeled effectively by the trailing edge noise.