Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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DEVELOPMENT OF UNEVEN FAN BY AERO-ACOUSTICS ANALYSIS & OPTIMIZATION METHOD

공력소음해석과 최적화 기법을 통한 비등간격 팬 개발

  • Kim, J.S. (LG Electronics, CTO, HAE Lab.) ;
  • Kim, H.S. (LG Electronics, HA Division, DE Group) ;
  • Hyun, K.T. (LG Electronics, CTO, HAE Lab.)
  • Received : 2011.10.12
  • Accepted : 2012.03.16
  • Published : 2012.03.31
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Abstract

Acoustic pressure field around the centrifugal fan is predicted by a aero-acoustic splitting method. Unsteady flow field is obtained by solving the incompressible Navier-Stokes equations using commercial code, while the acoustic waves generated inside the centrifugal fan and shroud are predicted by solving the far field acoustics analysis. Computational results show that the acoustic waves of BPF tone are generated by interactions of the blades with the shroud. Acoustic results is validated by experimental results This paper describes the influence of geometric parameters on the noise generation from the section of blades and shroud. One of the effective ways to reduce BPF noise is optimization method using Genetic Algorithm, which effectively minimize eccentricity, is suggested. New improving design was developed by optimization method.

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References

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