Modeling for Transmission Loss Prediction of Different Shapes of Acoustic Muffler with an Experimental Analysis

Abstract

Muffler’s noise reduction is generally calculated by transmission loss and insertion loss. Single expansion chamber is generally used as silencing elements in intake and exhaust systems. The main aim of this paper is to study use of FEA (Finite element analysis) as well as experimental methods for various shapes of Mufflers with constant volume for transmission loss measurement. Various shapes are available for muffler like cylindrical, elliptical cylindrical, box with rectangular and square cross section, conical and venturi etc. Finite element analysis is generally used for virtual reality. So it saves substantial amount of time and resources. The acoustic characteristics of all shapes of muffler with single central inlet and single central outlet are also investigated in detail by experimental methods as well FEA results. Set up of two load method is used here for transmission loss measurement. By comparing the experimental results with FEA results shows the validation of results. This paper is investigating the shape of muffler which is capable to reduce noise level.
Keywords: Muffler’s shape, transmission loss, WAVE 1-D, finite element analysis
Cite this Article:Amit Kumar Gupta, Ashesh Tiwari. Modeling for Transmission Loss Prediction of Different Shapes of Acoustic Muffler with an Experimental Analysis. Journal of Experimental & Applied Mechanics (JoEAM). 2015; 6(1): 57–61p.