Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Self-Noise Prediction from Helicopter Rotor Blade

헬리콥터 로터 블레이드의 자려소음 예측

  • 김효영 (전북대학교 대학원 항공우주공학과) ;
  • 유기완 (전북대학교 공과대학 기계항공시스템공학부)
  • Received : 2007.02.20
  • Accepted : 2007.03.19
  • Published : 2007.03.31
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Abstract

Self-noise from the rotor blade of the UH-1H Helicopter is obtained numerically by using the Brooks' empirical noise model. All of the five noise sources are compared with each other in frequency domain. From the calculated results the bluntness noise reveals dominant noise sources at small angel of attack, whereas the separation noise shows main noise term with gradually increasing angel of attack. From the results of two different tip Mach numbers with the change of angel of attack, the OASPLs at M = 0.8 show about 15dB larger than those at M = 0.4.

Keywords