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CFD and CAA Analysis of Centrifugal Fan for Noise Reduction
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 86 - Number 7 |
| Year of Publication: 2014 |
| Authors: S. Ramakrishna, Vommi Krishna, A. Ramakrishna, K. Ramji |
10.5120/14996-3008
|
S. Ramakrishna, Vommi Krishna, A. Ramakrishna, K. Ramji . CFD and CAA Analysis of Centrifugal Fan for Noise Reduction. International Journal of Computer Applications. 86, 7 ( January 2014), 10-16. DOI=10.5120/14996-3008
Abstract
Centrifugal fans usually operate at high rotating speeds and hence generate high levels of noise whose reduction over a broad range of operating conditions is a key concern for the designer. An important first step in this direction is identification of noise sources and its quantification. For this purpose, Computational Fluid Dynamics (CFD) and computational aeroacoustic analyses is performed on centrifugal fans with backward impeller, radial impeller and forward impellers using CFD code FLUENT. To validate these results noise measurements are performed on centrifugal fans with backward impeller, radial impeller and forward impellers. The results so obtained from numerical analyses are compared with the measurement results. It is found that there is good agreement between numerical and experimental results. From these results it is observed that least noise of 92. 6 dB(A) and high flow rate of 0. 399 m3/sec occurs with backward impeller whereas large noise of 102. 5 dB(A) and least discharge of 0. 365 m3/sec is observed with forward impeller. The present study concludes that backward impeller radiates less noise and high discharge compared to radial and forward impellers.
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