Design Analysis & Modification of Exhaust Muffler of Agriculture Diesel Engine on the Basis of CAE Modeling and Simulation

Vibration and noise reduction methods are essential research area in many industries. Mufflers are widely used in automobile industries to reduce noise and vibration transmission. The noise of agriculture diesel engine under the working condition is becomes a serious problem. Generally, noise level of more than 80 dB is harmful for human being. The intensity of noise can be reduced by using muffler at the exhaust system of I.C. Engine. High noise level can be harmful to people and can lead not only to psychological but also leads the hearing defects. Therefore the demand of low noise level becomes vital and more competitive. The noise level can be reduced by modifying the design of existing silencer on the arrangement of baffles. The baffle creates an obstruction to the flow of exhaust gas which will causes the great amount of backpressure at the exhaust port thus losing engine power, increasing fuel consumption and piston effort to exhale the gases out. Therefore it is required to design the silencer on the arrangement of baffle to minimum back pressure of exhaust gas. This research paper work deals CAE approach with comparison of newly designed model of chambered exhaust silencer and concludes the best possible design for least pressure drop. Field view is used for post processing the CFD results and reviewing the airflow streamlines. The exhaust gas velocity and pressure graphs are studied across the internal tube and holes. The new design of silencer with less noise and minimum backpressure is suggested.