Aerodynamic Noise Analysis of Wood Milling Cutter Based on FLUENT
In order to reduce the aerodynamic noise of woodworking cutters during discharge,the acoustic analogy Lighthill combined with the Realizable K-E model is used for stable simulation.After stabilization,the FFOWS Wil-liams Hawkins(FW-H)model is used for numerical simulation during the transition period to calculate the aerody-namic far-field noise.Analysis of flow and velocity distribution,sound power distribution,pressure fluctuations and aerodynamic far-field noise on the surface of the cutter and its surroundings.The results suggest that the front of the woodworking cutter,the groove area and the blade structure B are the key areas for the formation of shot vortices,which are the main sources of aerodynamic noise.In particular,the vortex on the surface of the front blade can cause significant pressure fluctuations,which have a particularly strong effect on the aerodynamic noise.In order to effec-tively reduce noise when optimizing the geometric structure of milling cutters,special attention should be paid to the area of the front blade,the area of the chute and the structure of the milling body B.The research results of this arti-cle aim to provide a theoretical basis for the design of low-noise woodworking cutters.
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