Numerical study of oxygen dilution and temperature distribution of biogas combustion in Bluff-body MILD burner

Noor, M. M. and Wandel, Andrew P. and Yusaf, Talal (2013) Numerical study of oxygen dilution and temperature distribution of biogas combustion in Bluff-body MILD burner. In: 7th Australian Combustion Symposium (ACS 2013), 6-8 Nov 2013, Perth, Australia .

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Abstract

Cleaner and more efficient combustion processes are demanded by the combustion industry due to fuel depletion and air quality issues. A numerical study of a laboratory scale combustor is reported. The numerical simulations were carried out using ANSYS Fluent 14.5. Turbulence was modelled using the realizable k–ε model. The combustion chamber is an open end cylinder with the burner mounted at the bottom of the combustor. Biogas was used as a fuel with 60% methane and 40% carbon dioxide and oxidiser used was atmospheric air and synthetic air by mixing oxygen and nitrogen. The oxygen dilution ratio was analysed at the exhaust gas recirculation (EGR) and air supply mixing area. The dilution ratio is 40% for atmospheric air and a lower ratio when the low-oxygen synthetic air was used. The temperature throughout the combustion chamber was found to be close to homogeneous. The inlet air velocity did not affect the chamber and EGR temperature. In these simulations, MILD combustion was achieved.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 14 Nov 2013 23:08
Last Modified: 05 Dec 2014 03:19
Uncontrolled Keywords: computational fluid dynamics; bluff-body MILD burner; biogas
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
03 Chemical Sciences > 0307 Theoretical and Computational Chemistry > 030703 Reaction Kinetics and Dynamics
02 Physical Sciences > 0299 Other Physical Sciences > 029999 Physical Sciences not elsewhere classified
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
URI: http://eprints.usq.edu.au/id/eprint/24262

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