Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)

  • 2011.10a
  • /
  • Pages.687-692
  • /
  • 2011
  • /
  • 1598-2548(pISSN)
The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Experimental analysis on noise reduction of subsonic jet flow with chevron nozzle

노즐 출구 형상에 따른 아음속 제트 유동의 소음 저감에 대한 실험적 연구

  • 배주현 (서울대학교 기계항공공학부) ;
  • 이규호 (서울대학교 기계항공공학부) ;
  • 공병학 (서울대학교 기계항공공학부) ;
  • 김민우 (서울대학교 기계항공공학부) ;
  • 이수갑 (서울대학교 기계항공공학부)
  • Published : 2011.10.27
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Abstract

Experimental analysis has been carried out on noise reduction of subsonic jet flow with chevron nozzle to investigate relationships between geometry variation of chevron nozzles and jet noise reduction. Including base nozzle, seven nozzles are tested at Mach number 0.9. Parametric variables are chevron count, chevron length, and chevron shape. From these experiment, the more chevron count increase, the more jet noise reduction gain. Varying the chevron length, short chevron nozzle increase the jet noise at certain direction all the more. Chevron shape is also considered as important factor to reduce the jet noise.

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