Numerical and Experimental Study of a passive reflection silencer to reduce marine engine exhaust noise (A case of Study of diesel generator MTU 183 AA)

Depending on the type of mission high speed craft, reducing engine noise is essential. To reduce noise, amuffler system is used, that is installed in the exhaust outlet. Sample Study to reduce noise, is MTU 183 AA diesel. Due to natural aspirated system, it has a lot of sound and noise. Analysis of computational fluid method and software FLUENT is used. In this study, to reduce engine noise, back pressure has been noted that not out of range. The results show that the use of perforated tube in passive reflection silencer, noise reduction is acceptable. The passive reflection silencer was designed to reduce the noise to an acceptable level and the back pressure does not rise. The numerical results obtained from CFD compared with experimental results are satisfactory.