• Pritam Saha
• Harshpreet Singh Kaberwal
• Amit Kumar Mishra
• Md Mahtab Alam
• Nagarjuna Kadiyala ,Ujjal Kalita

Day by day as the number of vehicles are increasing, the noise produce by the exhaust system is also increasing which is affecting the common people. Muffler is one such device used for reducing the noise emitted by this exhaust system of an internal combustion engine or automobile. In this study the aerodynamic performance of muffler is considered for study. Initially performance of an existing muffler used in four-cylinder petrol engine of 91 bhp, 6000 RPM is determined. By keeping the volume of muffler constant, a better optimized muffler is proposed by performing CFD analysis. Four different models are simulated at different velocity of 20m/s, 40m/s, 60m/s and 80m/s and compared with each other to find the best performing muffler design. From the analysis it was observed that model 2 produces around 21%, 11% and 43% increase in pressure drop as compared to model 1, model 3 and model 4 respectively. Thus, from this study model 2 is proposed as the best optimized muffler for use for this petrol engine. Here, Creo Parametric and Ansys Design modeler is used to design these mufflers and Ansys Fluent is used for flow analysis and aerodynamic performance estimation.

Muffler, Noise reduction, Automobile, Pressure drop, Maruti Ciaz

"DESIGN AND PERFORMANCE ESTIMATION OF AN AUTOMOBILE MUFFLER USING COMPUTATIONAL FLUID DYNAMICS ANALYSIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 4, page no.11-19, April-2021, Available :http://www.jetir.org/papers/JETIR2104203.pdf

"DESIGN AND PERFORMANCE ESTIMATION OF AN AUTOMOBILE MUFFLER USING COMPUTATIONAL FLUID DYNAMICS ANALYSIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 4, page no. pp11-19, April-2021, Available at : http://www.jetir.org/papers/JETIR2104203.pdf