Volume 1, Issue 2, December 2016, Page: 46-54
Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers
Mostafa Ranjbar, Mechanical Engineering Department, Yildirim Beyazit University, Ankara, Turkey
Maryam Alinaghi, Mechanical Engineering Department, Eastern Mediterranean University, Gazimagusa, Turkey
Received: Aug. 27, 2016;       Accepted: Nov. 2, 2016;       Published: Nov. 25, 2016
DOI: 10.11648/j.mma.20160102.13      View  3569      Downloads  101
The reduction of the emitted noise pollution from the exhaust system of engines is a real challenge for various industries. At this regard, mufflers have been used to reduce the transmitted noise from the engine of vehicles into the surrounding environment. Mufflers are designed to reflect the sound waves produced by the engine in such a way that they partially cancel themselves out. Noise transmission loss performance in muffler depends on its geometry. Therefore, maximization of noise transmission loss in mufflers using shape modification concept is an important research area. In this paper research, maximization of noise transmission in mufflers is studied and investigated. A model is developed to present the absorptive muffler. The muffler structure and its sound absorbing layer are modeled using shells elements. This model analyzes the muffler structure which has effects on the transmission loss (TL). The results are compared to a model without any absorbing layer. It indicates that the thickness and material type of absorbing layer have distinctive effects on the amount of noise transmission loss of muffler over a wide frequency range.
Absorptive Muffler, Noise Transmission Loss, Sound Absorbing Material, Shell
To cite this article
Mostafa Ranjbar, Maryam Alinaghi, Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers, Mathematical Modelling and Applications. Vol. 1, No. 2, 2016, pp. 46-54. doi: 10.11648/j.mma.20160102.13
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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