Advanced Search
SONG Miaoyan, DING Cunwei, CHEN Hongqing, et al. Research on the noise reduction design of an axial flow fan based on shape optimization[J]. Technical Acoustics, 2025, 45(0): 1-11. DOI: 10.16300/j.cnki.1000-3630.24071702
Citation: SONG Miaoyan, DING Cunwei, CHEN Hongqing, et al. Research on the noise reduction design of an axial flow fan based on shape optimization[J]. Technical Acoustics, 2025, 45(0): 1-11. DOI: 10.16300/j.cnki.1000-3630.24071702

Research on the noise reduction design of an axial flow fan based on shape optimization

  • Aiming at the aero-acoustics problem of an axial flow fan, the aerodynamic and acoustic characteristics of the axial flow fan are analyzed by using Detached Eddy Simulation (DES) and the acoustic analogy method. Based on the semi-anechoic chamber of AVIC Aerodynamic Research Institute, the noise is tested to verify the reliability of the numerical method. By analyzing the reasons for noise production, the design direction is determined. By modifying the structure of the moving blades and adjusting the mounting angle of the stationary blade, the aerodynamic noise of the fan is optimized, and the effect is analyzed. The results show that tip leakage flow leads to a larger low-pressure zone in the 1/3 chord length of the blade, causing severe flow separation around the trailing edge of the stationary blade, resulting in higher tonal noise at 1BPF and higher broadband noise in the range from 5000 Hz to 8000 Hz for this axial flow fan. By changing the shape of the blade and adjusting the mounting angle of the stationary blade, the strength of the tip leakage flow vortex is reduced, and the interaction between the tip leakage flow vortex and the stationary blade is weakened. The noise at 1BPF, 2BPF, and 3BPF is reduced. The total noise reduction at a specific monitoring point reaches up to 2.2 dBA.
  • loading

Catalog

    Turn off MathJax
    Article Contents

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return
    Disclaimer: The English version of this article is automatically generated by iFLYTEK Translation and only for reference. We therefore are not responsible for its reasonableness, correctness and completeness, and will not bear any commercial and legal responsibilities for the relevant consequences arising from the English translation.