Abstract
Noise prediction of centrifugal fan is difficult because flows are turbulent and locally separated in the blade flow passages. It is important to realize that the far-field acoustics are dominated by the internal pressure fluctuations inside the fan motor housing, comprised of rotating impellers, diffusers, return channels, motor stands, etc. In the present study, an uRANS-based approach with k-ω SST turbulence model is used to predict the fan performance as well as the noise characteristics of the centrifugal fans. The near-field pressure fluctuation spectra computed by uRANS are in good agreement with the measured far-field SPL spectra in a relative manner, if the flow rate is not too off from the peak efficiency. It is expected that the uRANS can be used as a tool for optimizing the fan noise characteristics, as long as the fan is enclosed with the fan motor housing.
| Original language | English |
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| Title of host publication | FAN 2015 - International Conference on Fan Noise, Technology and Numerical Methods |
| Publisher | Institution of Mechanical Engineers |
| Volume | 2015-April |
| ISBN (Electronic) | 9780957237438 |
| Publication status | Published - 2015 Jan 1 |
| Event | International Conference on Fan Noise, Technology and Numerical Methods, FAN 2015 - Lyon, Villeurbanne, France Duration: 2015 Apr 15 → 2015 Apr 17 |
Other
| Other | International Conference on Fan Noise, Technology and Numerical Methods, FAN 2015 |
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| Country/Territory | France |
| City | Lyon, Villeurbanne |
| Period | 15/4/15 → 15/4/17 |
ASJC Scopus subject areas
- Acoustics and Ultrasonics