Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Theoretical and Experimental Study on Airfoil Singing

날개 명음소음에 관한 이론 및 실험 연구

  • 안병권 (충남대학교 항공우주선박해양공학부) ;
  • 이종현 (충남대학교 항공우주선박해양공학부) ;
  • 이욱 (충남대학교 항공우주선박해양공학부) ;
  • 최종수 (충남대학교 항공우주선박해양공학부)
  • Published : 2010.02.20
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Abstract

Periodic vortex separations generate periodic vertical forces acting on a trailing edge of an airfoil. When a natural frequency of the trailing edge of the airfoil is close to a vortex shedding frequency, an amplitude of the edge oscillation becomes maximal; it makes intensive noise called singing. Motion of the trailing edge may also feedback to the vortex shedding so that self-sustained oscillation appears, and a resonant frequency is locked in some interval of the speed of the incident flow. In this study, a theoretical model is proposed and applied for modeling an airfoil singing. Results are compared with experimental measurements which are carried out in an anechoic wind tunnel.

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References

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Cited by

  1. Vortex Shedding Frequency for a 2D Hydrofoil with a Truncated Trailing Edge vol.51, pp.6, 2014, https://doi.org/10.3744/SNAK.2014.51.6.480