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Noise reduction in automobile muffler(silencer) using CFD

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Old   January 9, 2010, 11:29
Question Noise reduction in automobile muffler(silencer) using CFD
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aniket
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This is a B.E project.I'm using a resonator geometry(set of tubes with holes in them) for noise reduction.Is d analysis of such a geometry possible using CFD???
Also do the holes behave as wall only?
Right now i know that only mass flow rate values can be given at inlet.What should be the inertia and viscous resistances values (if these can b d other parameters) at muffler inlet to obtain noise reduction after d muffler??
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Old   February 17, 2010, 12:54
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Quote:
Originally Posted by aniket View Post
This is a B.E project.I'm using a resonator geometry(set of tubes with holes in them) for noise reduction.Is d analysis of such a geometry possible using CFD???
Also do the holes behave as wall only?
Right now i know that only mass flow rate values can be given at inlet.What should be the inertia and viscous resistances values (if these can b d other parameters) at muffler inlet to obtain noise reduction after d muffler??
hi...im tryin to do the same thing
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Old   February 24, 2010, 19:00
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You need to first decide on the time you have in hand and the computing power that you have. The holes you can model them as a cavity region. The more the complexity that you introduce, the uncertanities increases with them.
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Old   February 24, 2010, 22:22
Default Regarding analysis of muffler using cfd.
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Sir,
Thank you so much for replying. We have got a geometry of a perforated pipe type of muffler that has been developed in CATIA V5 R17.. Can we import that file in GAMBIT and then create a mesh on it? If yes, then please guide us how? It is our final year B.E. project and we have time till March End.
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Old   March 7, 2010, 03:34
Post Meshing perforated tube
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how do v mesh a perforated tube.there r 3 perforated tubes inside the muffler body n 1 of the tube is vertical .so how can v use Cooper scheme for meshing....if not then which scheme should v use.
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