GA optimization on single-chamber muffler hybridized with extended tube under space constraints

Mufflers are habitually adopted in gas venting systems
under space constraint for maintenance and operation. The shape optimization in
the muffler to maximize the sound performance is then highly focused,
accordingly. In this paper, the shape design of a muffler with extended tubes
optimized by the genetic algorithm (GA) is presented. A numerical case in
eliminating the pure tone noise is introduced. Before optimization, the
mathematical model is compared by the experimental data for an accuracy check.
The results indicate that the sound transmission loss (STL) is maximized exactly
at the designed frequency. Consequently, we demonstrate a successful GA
application on the muffler design. Key words: single-chamber muffler hybridized
with extended tube, transfer matrix method, space constraints, GA optimization.