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http://dx.doi.org/10.5050/KSNVE.2011.21.8.726

Noise Reduction of a Blower for an Automatic Car Washer by Using Dissipative Silencers  

Kim, Jae-Young (전북대학교 기계공학과, 한국지엠)
Lee, Il-Jae (전북대학교 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.21, no.8, 2011 , pp. 726-732 More about this Journal
Abstract
Straight absorptive silencers have been designed to reduce the noise level of a centrifugal blower. Three-dimensional boundary element method is used for the design of absorptive silencers which consist of a perforated main pipe and a outer chamber filled with fibrous material. The experimental results show that the absorptive silencer reduces up to 8 dB(A) in the overall sound pressure level of the blower and up to 15 dB at the blade passing frequency. It is also found that the gap between the silencer and the impeller may substantially alter the acoustic performance of the silencers. The transmission loss predicted by the boundary element method follows overall trends of the measured insertion loss. The experiments also show that the impact of the silencers on the aerodynamic performance of the blower is minimum.
Keywords
Blower; Silencers; Noise Reduction;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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