Marine diesel engine is essential on a ship, but emits extremely loud noise harmful to human hearing. Therefore, it is mandatory to use silencers to reduce the venting noise of the marine diesel engine. An advanced silencer with a new acoustical element of a curved tube, along with perforated holes, is presented to suppress the noise wave. To predict the silencer's acoustical performance for high-order waves, a finite element model was built using COMSOL. The influence of the silencer's noise reduction ability was investigated by exploring sensitivity using acoustical simulations on COMSOL, regarding the silencer's geometric factors. The results proved that the silencer, featuring a perforated coiled tube and a perforated straight tube, is effective in noise elimination.
Chiu, Min-Chie and Cheng, Ho-Chih
"Numerical Analysis of Silencer with a Coiled Tube and Straight Perforated Tube Using FEM,"
Journal of Marine Science and Technology: Vol. 31:
2, Article 4.
Available at: https://jmstt.ntou.edu.tw/journal/vol31/iss2/4