%0 Journal Article
	%A Zeynep Parlar and  Şengül Ari and  Rıfat Yilmaz and  Erdem Özdemir and  Arda Kahraman
	%D 2013
	%J International Journal of Mechanical and Mechatronics Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 75, 2013
	%T Acoustic and Flow Field Analysis of a Perforated Muffler Design
	%U https://publications.waset.org/pdf/11998
	%V 75
	%X New regulations and standards for noise emission increasingly compel the automotive firms to make some improvements about decreasing the engine noise. Nowadays, the perforated reactive mufflers which have an effective damping capability are specifically used for this purpose. New designs should be analyzed with respect to both acoustics and back pressure. In this study, a reactive perforated muffler is investigated numerically and experimentally. For an acoustical analysis, the transmission loss which is independent of sound source of the present cross flow, the perforated muffler was analyzed by COMSOL. To be able to validate the numerical results, transmission loss was measured experimentally. Back pressure was obtained based on the flow field analysis and was also compared with experimental results. Numerical results have an approximate error of 20% compared to experimental results.

	%P 447 - 451