Fan Noise Control by a Flexible Casing Structure

  • Z. B. Wang
  • Y. S. ChoyEmail author
  • Q. Xi
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


The work presented here examines the performance and effectiveness of fan noise control in a duct by using light panels with backing cavity. The method aims to suppress the low-frequency noise by destructive interference between the acoustic field in the duct and sound radiation from the panel. A three-dimensional numerical model is established to investigate the details of flow-structure interaction and its influence on the fan noise suppression. The aerodynamic characteristics near the fan blades and the vibration of the flexible structure also plays an important role in the noise suppression. The findings of this study will provide an alternative method of fan noise abatement focusing on the source.


Fan noise Flexible structure Flow-structure interaction 



The authors wish to acknowledge the funding support from NSFC-2012,51205337, the Research Grants Council of the Hong Kong SAR (BQ33E) and The Hong Kong Polytechnic University for the research studentship.


  1. Choy YS, Huang LX (2002) Experimental studies of a drumlike silencer. J Acoust Soc Am 112:2026–2035CrossRefGoogle Scholar
  2. Choy YS, Hung LX (2005) Effect of flow on the drumlike silencer. J Acoust Soc Am 118:3077–3085CrossRefGoogle Scholar
  3. Huang LX (2002) Modal analysis of a drumlike silencer. J Acoust Soc Am 112:2014–2025CrossRefGoogle Scholar
  4. Liu Y et al (2012) Noise suppression of a dipole source by tensioned membrane with side-branch cavities. J Acoust Soc Am 132:1392–1402CrossRefGoogle Scholar
  5. Liu Y et al (2014) Reactive control of subsonic axial fan noise in a duct. J Acoust Soc Am 136:1619–1630CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringThe Hong Kong Polytechnic UniversityHong KongChina

Personalised recommendations