Shape Optimization of Multi-chamber Side Inlet/Outlet Mufflers with Reverse-Flow Ducts by Simulated Algorithm

To proficiently enhance the acoustical performance within a constrained space, the selection of an appropriate acoustical mechanism and optimizer becomes crucial. A multi-chamber side muffler hybridized with reverse-flow ducts which can visibly increase the acoustical performance is rarely addressed; therefore, the main purpose of this paper is to numerically analyze and maximize the acoustical performance of this muffler within a limited space. In this paper, a simulated annealing (SA) algorithm, a robust scheme in searching for the global optimum by imitating the softening process of metal, has been used during the optimization process. A noise elimination of a fan noise at pure tones is introduced. The optimal result in eliminating pure tone noise reveals that the STL is efficiently and precisely eliminated at the targeted frequency.