A methodological method based on the use of theory preferred numbers has been proposed in order to improve most important parameters working bodies noise mufflers. As a result many years scientific research, authors have established previously unknown theoretical relationship between main series numbers, golden ratio and Fibonacci numbers. new direction development number considered paper, its ...

PT. XYZ merupakan sebuah perusahaan manufaktur yang bergerak dibidang otomotif dan sudah berjalan sebagai supplier komponen untuk beberapa terkemuka di Indonesia. Kebanyakan proses produksi pada dengan baik. Tetapi terdapat salah satu sub produk mereka memiliki kendala dalam produksinya yaitu muffler K-59J. Pada lintasan K-59J dinilai kurang optimal produksinya. Hal tersebut dilihat dari banyak...

Internal combustion engines and blowers frequently utilize silencers to reduce exhaust noise. In the current paper, transmission loss of reactive is predicted using plane wave decomposition method a three-dimensional (3-D) time-domain computational fluid dynamics (CFD) approach. A mass-flow-inlet boundary condition first used perform steady flow computation, which serves as an initial for two s...