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http://dx.doi.org/10.5050/KSNVE.2012.22.5.468

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

Kim, Sang-Ryul (한국기계연구원 시스템다이나믹스 연구실 음향소음팀)
Kim, Hyun-Sil (한국기계연구원 시스템다이나믹스연구실)
Lee, Sung-Hyun (한국기계연구원 시스템다이나믹스연구실)
Park, Keun-Hyo (하이에어코리아 기술연구소)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.22, no.5, 2012 , pp. 468-473 More about this Journal
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.
Keywords
Room Unit; Insertion Loss; Flow Noise; Damper; HVAC Element;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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2 NORSOK Standard S-002 Rev.4:2004, Working Environment, Annex A.
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9 Kim, S. R., Kim, H.-S., Kim, J.-S., Kim, B.-K. and Lee, S.-H., 2011, Measurement of Noise Characteristics of Shipboard Room Units with Multiple Outlets, Proceedings of the Acoustic Society of Korea Annual Spring Conference, Vol. 30, No. 1, pp. 63-66.
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