| Issue |
E3S Web Conf.
Volume 615, 2025
2024 International Conference on Environmental Protection and Pollution Control (EPPC 2024)
|
|
|---|---|---|
| Article Number | 01010 | |
| Number of page(s) | 9 | |
| Section | Research on Environment and Ecosystem Optimisation and Management | |
| DOI | https://doi.org/10.1051/e3sconf/202561501010 | |
| Published online | 14 February 2025 | |
Research on Noise Reduction of Axial Flow Fan Cover Based on CFD/CAA
Nanjing Research Institute of Electronics Technology, Nanjing 210039, China
* Corresponding author: chkyx2011@163.com
Taking an axial fan for an electronic equipment chassis as the research object, combining the theories of Computational Fluid Dynamics (CFD) and Computational Aerodynamic Acoustics (CAA), the steady state and non-stationary analyses are carried out by using the RNG k – ε turbulence model and the Large Eddy Simulation (LES) method. The distribution of dipole noise on the surface of the fan cover and the aerodynamic noise characteristics of the fan’s far-field are analysed by the wide-frequency noise model and the FW-H model. The aerodynamic noise of the wind turbine has discrete peaks at the fundamental frequency and its higher harmonics. The broadband noise part gradually decreases with the increase of frequency and tends to level off. Numerical simulation results show that: the aerodynamic noise of the fan without fan cover is 55dB, and the installation of fan cover will increase the total sound pressure level and shift the octave peak to the right. The aerodynamic noise of cross-circle type fan cover is 60.4dB, the aerodynamic noise of cross type fan cover is 59.7dB, and the performance of honeycomb type and rectanglenet type fan covers are comparable, which are 58.4dB and 58.2dB, respectively.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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