Abstract: This paper describes predicted results of the Acoustic Transmission Loss, Insertion Loss & Back Pressure. Noise emitted from the automobiles Engines need to be controlled due to environmental concerns. Hence good design of the muffler should give the best noise reduction and offer optimum backpressure for the engine. Transmission Loss, IL & Back pressure are the important performance parameters for optimization of muffler. Design of mufflers is a complex function that affects noise characteristics, emission and fuel efficiency of engine. Therefore muffler design becomes more and more important for noise reduction. Traditionally, muffler design has been an iterative process by trial and error. However, the theories and science that has undergone development in recent years has given a way for an engineer to cut short number of iteration.
The muffler geometry can be optimized consequently, to attenuate or remark certain spectral components of the engine noise, according to the results expected. Then modify the muffler design by increasing the no. of holes on the baffle plate or by some other means. In particularly 1-D GT-Power Simulation tool has been applied to predict the muffler behaviour in time & frequency domain. In this process very efficient muffler is taken for bench marking & tested for transmission loss, Insertion loss & Back pressure. These results are validated in the GT-power. Depending on the performance of this muffler the targets are set for the new muffler.
Keywords: Silencer, Insertion Loss, Engine Noise, Backpressure.
Title: Design Analysis and Testing of Silencer
Author: Mohit juneja, Dilip verma, Anoop singh chauhan,Shivam pathak, Mohit yadav, Ashish gupta
International Journal of Mechanical and Industrial Technology
ISSN 2348-7593 (Online)
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