Aeroacoustic Performance Evaluation of Milling Cutters Based on the Flow Field on the Cutter Surface

Abstract:

Many workers all over the world suffer significant hearing loss as well as psychological and physical stress as a result of exposure to high levels of aeroacoustic noise. Dipole sources are the major noise sources in aeroacoustic noise generation in rotating face milling cutters. A noise model based on the Ffowcs Williams-Hawkings Equation is used to predict aeroacoustic noise; the noise predicted was 2.5dB less than the experimental observations. Flow field of cutter surface was numerically simulated by the resolution of the Navier-Stokes equations (CFD) and five zones on cutter surface were founded to be the important noise source. The broadband noise spreads over a broad range of frequencies and contributes significantly to overall noise, but the discrete noise at the rotational frequency is usually higher and more detrimental to the body.

• Periodical: Advanced Materials Research (Volume 188)
• Pages: 398-403
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.188.398
• Online since: March 2011
• Authors: Chun Hui Ji, Zhan Qiang Liu
• Keywords: Aeroacoustic Noise, Face Milling Cutter, Numerical Simulation, Spectra Analysis

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