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A Study of Active Control of Blade Rotation Noise of a Fan
Ren Baosheng  Zhang Kemeng
£¨Xi'an Jiaotong University, 710049£©
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Abstract: The acoustic model of blade rotation noise and rotor-stator interaction noise of fan's rotation has been deduced, also, the expression of sound power has been done. Based on the minimum sound power radiated theory, the active control equation of resource attenuation has been deduced and the influence of parameters of secondary source, such as radius and the number of secondary point source, on attenuation effect has been discussed.
Keywords: noise, active control, fan blade.

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