Ahmed Elsayed

Work place: Institute for Advanced Manufacturing Engineering (AME)

E-mail: ahmed.elsayed.1981@gmail.com


Research Interests: Software, Software Development Process, Software Engineering, Software Notations and Tools


Ahmed Elsayed has a PhD degree in thermal engineering from mechanical engineering at the University of Birmingham 2011 experiencing in modelling and testing of boiling and condensation heat transfer. During his career he joined several research projects including adsorption cooling systems for Weatherite Air Conditioning Limited 2012-2014 with Knowledge transfer partner (KTP) project, Stirling engines research program at university of Birmingham 2014-2015, and Computational fluid dynamics analysis for various exhaust systems using OpenFoam at Coventry University 2015-2016. He completed several consultation projects including development of thermosyphon performance software tool for Sterling Thermal Technology, enhanced coated condensers for Alkemy. Dr Elsayed has more than 30 published articles in peer reviewed international journals, conferences and 3 book chapters

Author Articles
Enhancing Noise Attenuation in Exhaust Mufflers on Response to Baffle Configuration

By Ahmed Elsayed Christophe Bastien Humberto Medina Steve Jones Hassan Kassem

DOI: https://doi.org/10.5815/ijem.2017.04.02, Pub. Date: 8 Jul. 2017

Using baffles in exhaust mufflers is known to improve transmission loss and reduce the noise emitted to the environment. This paper postulates that baffle cut ratio affects the muffler performance in the same effect as a shell-and-tube heat exchanger, consequently the baffle cut ratio should affect the muffler performance. This study presents a parametric study on the effect of baffle configuration on predicted transmission loss and pressure drop. The effect of baffle cut ratio, baffle spacing, number of baffle holes, and hole pattern distribution on transmission loss was investigated. Results showed that reducing the baffle cut ratio increased the transmission loss at intermediate frequencies by up to 45% while decreasing the spacing between muffler plates improved the muffler transmission loss by 40%. The assessment of the baffle effect on flow using a thermal baffle approach model indicated a sudden drop in fluid temperature in axial flow direction by 15% as the baffle cut ratio changed from 75% to 25. To the best of authors knowledge, the effect of baffle cut ratio configuration on acoustic response and back pressure has not been previously reported or investigated.

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