Indian Journal of Science and Technology
Year: 2016, Volume: 9, Issue: 47, Pages: 1-5
R. Praveen kumar1 , M. Sasikumar1* and S. Dinesh Kumar2
1 School of Mechanical and Building Sciences (SMBS), VIT University, Chennai Campus, Chennai – 600127, Tamil Nadu, India; [email protected], [email protected] 2 Department of Automobile Engineering, Karpaga Vinayaga College of Engineering and Technology, Chennai - 600024, Tamil Nadu, India; [email protected]
*Author for correspondence
School of Mechanical and Building Sciences (SMBS), VIT University, Chennai Campus, Chennai – 600127, Tamil Nadu, India; [email protected]
Objective: The main aim of this paper is redesigning Muffler internal layout to improve the attenuation based on the critical parameters. Analyzing the baseline muffler design, the area of improvement is identified as frequency range of 250Hz–800Hz. Methods: By keeping the volume of muffler constant and varying the critical parameters such as perforation size, length of perforations on the pipe, length of intermediate pipes and the position of baffles thirty iterations were performed. Finding: The exhaust gas flow path was modified in the new concept for better attenuation. Second and fourth chambers were made as expansion chambers. First and third chambers were made as Helmholtz chambers. With this basic flow path, further fine tuning was done by varying the critical parameters. Applications: With this current design and optimistic characteristic, the candidate’s muffler design can be used as noise reduction muffler in automobile industries.
Keywords: Acoustics, Muffler, Sensitivity Analysis, Transmission Loss
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