前缘波浪结构对轴流风机气动性能影响试验研究OA

The leading edge geometry of blades plays a critical role in the inlet flow characteristics,pressure fluctuations,and vortex evolution within axial fans.To enhance the aerodynamic performance and reduce noise,three bionic wave leading edge structures with varying amplitudes and wavelengths were designed based on biomimetic principles.The IDDES hybrid turbulence model and the Ffowcs-Williams&Hawkings(FW-H)acoustic analogy were conducted for numerical simulation,and the re-liability of the numerical model was verified by experimental data.The results demonstrate excellent agreement between simulations and experiments,with discrepancies within 2%.The comparative analy-sis indicates that the wave leading edge structures generate counter-rotating vortex pairs near wave troughs,effectively suppressing total vorticity and broadband noise.Among the tested configurations,the A7W10 design(A/C=7.6%,W/C=10%)exhibits optimal performance,achieving a 17.0%in-crease in total pressure,a 5.9%improvement in efficiency,and a 2.83 dB noise reduction at the moni-toring point.This study elucidates the mechanism of vortex control and noise mitigation induced by wave leading edges structure,providing a theoretical basis for designing high-efficiency and low-noise axial fans.