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Development of Shipboard Large-sized Low-noise Room Unit with Multiple Outlets

다수의 출구를 가진 선박용 대형 저소음 룸유닛 개발

  • 김상렬 (한국기계연구원 시스템다이나믹스 연구실 음향소음팀) ;
  • 김현실 (한국기계연구원 시스템다이나믹스연구실) ;
  • 이성현 (한국기계연구원 시스템다이나믹스연구실) ;
  • 박근효 (하이에어코리아 기술연구소)
  • Received : 2012.03.21
  • Accepted : 2012.04.20
  • Published : 2012.05.20

Abstract

In this paper, the acoustic performance of a shipboard large-sized room unit is studied. The room unit is a kind of rectangular absorptive chamber with a partition whose surface absorptive material with fabric skin is attached to. The room unit has one inlet and three outlets. At the inlet, a plane damper is installed to control the flow rate. The acoustic performance of a prototype room unit is measured using a HVAC mock-up. It is shown that its insertion loss is comparable with that of a commercially-used room unit but the developed room unit generates flow noise higher than the other one. The major source of flow noise is analyzed by NADS-R, the noise analysis program for room unit. Cone-shaped dampers are proposed to be used as the damper of a room unit to reduce flow noise. It is shown that the cone-shaped damper decrease flow noise remarkably.

Acknowledgement

Grant : 차세대 고부가가치선박의 저진동.소음 기술개발

Supported by : 지식경제부

References

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