Abstract
Noise generated in flow duct propagates extensively through the connected ductwork. Its propagation through the outlets would contribute to indoor acoustic discomfort and results in environmental problem. Silencers with acoustic lining are commonly adopted for noise mitigation in flow duct. Researchers have been devoting many numerical efforts in assessing the performance of a liner design. In general, numerical studies are performed by either time domain or frequency domain approach. This paper reports a development of calculation method solving Acoustic Perturbation Equations and Time-Domain Impedance Boundary on the Conservation Element and Solution Element (CE/SE) framework to calculate duct noise problem in time domain. In this paper, three benchmark cases are presented to verify the capability of the proposed method on calculating the flow induced acoustic generation, propagation, and the acoustic behavior at the impedance boundaries in the presence and absence of flow.
Original language | English |
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Title of host publication | INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering |
Subtitle of host publication | Improving the World Through Noise Control |
Publisher | Australian Acoustical Society |
ISBN (Electronic) | 9780909882037 |
Publication status | Published - 1 Jan 2014 |
Event | 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014 - Melbourne, Australia Duration: 16 Nov 2014 → 19 Nov 2014 |
Conference
Conference | 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014 |
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Country/Territory | Australia |
City | Melbourne |
Period | 16/11/14 → 19/11/14 |
Keywords
- CE/SE
- Duct noise
- Liner
ASJC Scopus subject areas
- Acoustics and Ultrasonics