In this paper,Fluent is applied in the 3D steady and unsteady numerical simulation of internal air flow of the multi-blade centrifugal fan,and the results are analyzed,the comparison between the numerical simulation re-sults and the experimental results demonstrate the good accordance and the reliability of the numerical simulation.And then,aero-acoustics numerical prediction is carried out based on the result of flow field,the result demon-strates that we can obtain the frequency character in the acoustic receiving location of the dominant aerodynamic noise source of the multi-blade centrifugal fan according to the FW-H acoustic model based on the result of un-steady flow field.All above can be helpful in the research on the noise character of noise source,and make sure the frequency section which the peak value is corresponding to,in the meantime,it can offer powerful suggestion and di-rection for the research on the following special noise control.
Multi-blade centrifugal fanAero-acousticsnumerical predictionFW-H acoustic model
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