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Abstract
The aerodynamic noise characteristic of a multi-blade centrifugal fan was studied by using numerical analysis and experimental test methods respectively. The unsteady flow dynamics analysis method and aeroacoustics based on finite element method were used to predict the spectral characteristics of noise of the fan. And then the spectral characteristic of noise of the centrifugal fan was measured in a semianechoic room. A good match was obtained respectively by using the numerical analysis and the experimental test. Based on this work, for now, the numerical analysis method of aerodynamic noise can be used to judge qualitatively the noise level of multi-blade centrifugal fans by adjusting the unsteady flow analysis model.
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