The effect of the flange attached to the inclined exit of tube on the noise radiation

관 경사출구에 부착된 플랜지가 소음방사에 미치는 영향

  • 백두산 (서울과학기술대학교 일반대학원 기계공학과) ;
  • 양윤상 (서울과학기술대학교 에너지환경대학원 에너지시스템공학과) ;
  • 이동훈 (서울과학기술대학교 기계공학과) ;
  • 이영균 (서울과학기술대학교 기계공학과)
  • Published : 2014.10.29

Abstract

The noise reduction performance of a passive facility is dependent on the its length or volume. In other words, this means that the larger the size of passive facility is, the better the noise reduction performance is. The sound directivity control has been proposed as an alternative for the noise reduction without a passive facility. The purpose of this study is to investigate the correlation between the flange attached to inclined exit of the tube and sound directivity when the sound radiates from the tube to the outside. As a result, the sound radiated from flanged tube had weak sound directivity in the wide angle. Also as the flange was bigger, the sound pressure level was lower in the behind the flange.

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