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Aeroacoustics of du...
Aeroacoustics of duct branches : with application to silencers
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- Karlsson, Mikael (författare)
- Swenox AB
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- Åbom, Mats (författare)
- KTH,Farkost och flyg
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- Glav, Ragnar, 1960- (författare)
- Scania AB
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(creator_code:org_t)
- 2011-09-11
- 2011
- Engelska.
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Ingår i: SAE technical paper series. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International. - 0148-7191.
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.4...
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visa färre...
Abstract
Ämnesord
Stäng
- The inclusion of flow-acoustic interaction effects in linear acoustic multiport models has been studied. It is shown, using a T-junction as illustration example, that as long the acoustic system is linear the required information is included in a scattering matrix obtained by experimental or numerical studies. Assuming small Mach numbers and low frequencies-as in most automotive silencer applications-the scattering matrix for the T-junction can be approximated using quasi-steady models. Models are derived that holds for all possible configurations of grazing and bias flow in the T-junctions. The derived models are then used to predict the performance of a novel silencer concept, where a resonator is formed by acoustically short-circuiting the inlet and outlet ducts of a flow reversal chamber. The agreement between experiments and simulations is excellent, justifying the use of the quasi-steady modeling approach.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- Acoustic systems
- Flow reversals
- Flow-acoustic interaction
- Multi-port
- Numerical studies
- Outlet duct
- Quasi-steady model
- Quasi-steady modeling
- Scattering matrices
- T junctions
- Acoustic fields
- Mach number
- Scattering parameters
- Vehicles
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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