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-   -   Noise reduction in automobile muffler(silencer) using CFD (http://www.cfd-online.com/Forums/main/71621-noise-reduction-automobile-muffler-silencer-using-cfd.html)

 aniket January 9, 2010 11:29

Noise reduction in automobile muffler(silencer) using CFD

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??:confused:

 kapil mohadikar February 17, 2010 12:54

Quote:
 Originally Posted by aniket (Post 241969) 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??:confused:
hi...im tryin to do the same thing:)

 harishg February 24, 2010 19:00

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.

 kapil mohadikar February 24, 2010 22:22

Regarding analysis of muffler using cfd.

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.

 aniket March 7, 2010 03:34

Meshing perforated tube

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.:confused:

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