Muffler resonance frequency
Muffler resonance frequency
(OP)
Hi,
I am new to this forum :)
I am trying to design a muffler and so am in the process of determining how much fiber glass I need behind the perforated pipe. I was wondering if anyone knows how to workout the resonance frequency for a muffler? I have a 599cc engine with 11000 rpm and 70bhp. I know if I put 6 inches of fiber glass then it will absorb around 99% of the sound frequencies but I wanna reduce the amount of space needed for the fiber glass to say 3 inches. So it only absorbs to the required frequencies and hence reducing the overall size of the muffler. Its on be put on a race car with a skeleton chassis.
If I can get a resonance frequency then I can workout the diameter of the perforations required for the space available.
I am new to this forum :)
I am trying to design a muffler and so am in the process of determining how much fiber glass I need behind the perforated pipe. I was wondering if anyone knows how to workout the resonance frequency for a muffler? I have a 599cc engine with 11000 rpm and 70bhp. I know if I put 6 inches of fiber glass then it will absorb around 99% of the sound frequencies but I wanna reduce the amount of space needed for the fiber glass to say 3 inches. So it only absorbs to the required frequencies and hence reducing the overall size of the muffler. Its on be put on a race car with a skeleton chassis.
If I can get a resonance frequency then I can workout the diameter of the perforations required for the space available.





RE: Muffler resonance frequency
"Schiefgehen will, was schiefgehen kann" - das Murphygesetz
RE: Muffler resonance frequency
either way thx for the help :)
RE: Muffler resonance frequency
I don't see how the hole diameters of perforates relates to packaging constraints.
If this is FSAE, you could use one of the tools you'll have been provided by the sponsoring companies to test out some different muffler configurations. Your engine guys will probably have a performance model to hand.
- Steve
RE: Muffler resonance frequency