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http://dx.doi.org/10.7776/ASK.2014.33.1.040

Analysis of Relative Contributions of Tonal Noise Sources in Volute Tongue Region of a Centrifugal Fan  

Heo, Seung (부산대학교 기계공학부)
Kim, Daehwan (부산대학교 기계공학부)
Cheong, Cheolung (부산대학교 기계공학부)
Publication Information
The Journal of the Acoustical Society of Korea / v.33, no.1, 2014 , pp. 40-47 More about this Journal
Abstract
Interaction between the unsteady flow emitted from the blade of the centrifugal fan and the volute tongue region of fan duct is known as the main noise source of the centrifugal fan. In this paper, the relative contributions of the volute tongue region of the centrifugal fan is analyzed to utilize as the foundation data of low noise design. The internal hybrid CAA (Computational Aero-Acoustics) method is used to predict noise radiated from the main noise source. This method is the noise prediction technique using CFD (Computational Fluid Dynamics), Acoustic analogy, and BEM(Boundary Element Method). The relative contributions of the centrifugal fan volute tongue region using the hybrid CAA method show that the region between the cut-off and the scroll has high contribution than the region between the cut-off and the outlet and the hub region of blade has high contribution than the shroud region of blade. These results is utilized as the important data for the development of low noise centrifugal fan.
Keywords
Centrifugal fan; Volute tongue region; Hybrid CAA method; Relative contribution; Low noise;
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Times Cited By KSCI : 2  (Citation Analysis)
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