Investigation of flow dynamics and decrease of vortex noise inside volute of centrifugal fans

LI Chunxi, WANG Songling

PDF(398 KB)
PDF(398 KB)
Front. Energy ›› 2008, Vol. 2 ›› Issue (2) : 235-240. DOI: 10.1007/s11708-008-0040-3

Investigation of flow dynamics and decrease of vortex noise inside volute of centrifugal fans

  • LI Chunxi, WANG Songling
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Abstract

The characteristics of three-dimension flow dynamics inside the volute of a G4-73No.8D centrifugal fan was simulated numerically using a computational fluid dynamics(CFD) technique. The generation, evolution, and noise of the vortex were investigated when cylinder-shaped and cone-cylinder-shaped anti-vortex rings were added separately. Numerical results showed that large-scale vortices were broken effectively and the flow fields inside the fan were more uniform with the two anti-vortex rings installed. Experimental results indicated A-sound level and spectrum noise of the refitted fan decreased and the two anti-vortex rings were effective in decreasing vortex noise. The cone-cylinder-shaped anti-vortex ring was more effective than the cylinder-shaped one in breaking large-scale vortexes and decreasing vortex noise.

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LI Chunxi, WANG Songling. Investigation of flow dynamics and decrease of vortex noise inside volute of centrifugal fans. Front. Energy, 2008, 2(2): 235‒240 https://doi.org/10.1007/s11708-008-0040-3

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