Modeling, attenuation and flow field analysis of diesel engine muffler using fluid structure interaction approach and experimental analysis

P. V. Shinde, R. G. Desavale, V. R. Patil, P. M. Gawali, S. M. Patil
2020 SN Applied Sciences  
The acoustic attenuation and acoustic pressure levels of a single-cylinder diesel engine are computed using COMSOL Multiphysics tool to evaluate the performance of the reactive muffler. To increase the travel of exhaust gas, internal modifications in the geometry of the muffler has been done. The experimental analysis shows that the pressure drop for the new developed model is much lesser than that of the existing model for same conditions. CFD approach is employed to investigate the effect of
more » ... low velocity and temperature on the acoustic attenuation performances of both muffler models. The experimental and numerical results of transmission loss have been validated. The results of the numerical analysis show close agreement with the experimental results. It is observed that the backpressure of the new developed muffler faces 42% reduction. Increasing the volume of the muffler with a single perforated baffle plate leads to noise reduction of 5.5%. The new developed muffler has been used to study the effects of transmission loss, acoustic attenuation analysis and acoustic pressure levels for the low-frequency range.
doi:10.1007/s42452-020-2683-6 fatcat:qu3inoui3rayxan3bhsuybqrgy