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Modal Analysis of an Axial Flow Fan and the Formula to Estimate Blade Swing Induced Tonal Noise

[+] Author Affiliations
Yuan-Sheng Qi

Beijing Institute of Graphic Communication

Xian-Jun Wu

Wuhan University of Technology

Shi-Jian Zhu

Naval University of Engineering

Paper No. IMECE2006-13626, pp. 89-92; 4 pages
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Noise Control and Acoustics
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Noise Control and Acoustics Division
  • ISBN: 0-7918-4776-4 | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME


Modal analysis is performed on an axial flow fan of air-conditioner. Modal test is performed for verification. Results indicate that in the low frequency ranges the vibrating shape is dominantly the blades swing around the hub because the rigidity is very small at this position. The low frequency vibrations contribute greatly on turbine noise. A formula to estimate the blade swing induced noise is deduced for reference.

Copyright © 2006 by ASME



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