Semi-Physical Modelling Approach for Exhaust Aftertreatment System of Heavy Duty Diesel Engines

Examensarbete för masterexamen

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Type: Examensarbete för masterexamen
Master Thesis
Title: Semi-Physical Modelling Approach for Exhaust Aftertreatment System of Heavy Duty Diesel Engines
Authors: Narayanan, Badhri
Abstract: The aim of this thesis work was to establish a kinetic and heat transfer model for the Diesel Oxidation Catalyst (DOC) using GT-Suite. The kinetic model was calibrated using a transient Part Load Map (PLM) driving cycle. The inhibition functions of the reactions were tuned to obtain a good curve fitting of reaction species. When a different drive cycle was applied, the model predictability was poor. The result demands a requirement for better heat transfer modelling. Adetailed external Heat transfer model was set up for this purpose. The results were better and the model was found to account for thermal mass variations in the system. The flow along the DOC was non-uniform, a 2 DOC model was established to account for the unequal inlet flow split and improved thermal mass understanding of the model. The results of the 2 DOC model however were inferred to be the same as 1 DOC. A discussion of results and a future outlook are presented.
Keywords: Transport;Hållbar utveckling;Maskinteknik;Farkostteknik;Kemiteknik;Transport;Sustainable Development;Mechanical Engineering;Vehicle Engineering;Chemical Engineering
Issue Date: 2018
Publisher: Chalmers tekniska högskola / Institutionen för mekanik och maritima vetenskaper
Chalmers University of Technology / Department of Mechanics and Maritime Sciences
Series/Report no.: Examensarbete - Institutionen för mekanik och maritima vetenskaper : 2018:62
Collection:Examensarbeten för masterexamen // Master Theses

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