Journal article

Polybrachial structures in dimethyl ether edge-flames at negative temperature coefficient conditions

A Krisman, ER Hawkes, M Talei, A Bhagatwala, JH Chen

Proceedings of the Combustion Institute | Elsevier | Published : 2015

Abstract

Abstract The structure and stabilisation mechanism of partially premixed, laminar, dimethyl ether (DME) flames are investigated using two-dimensional direct numerical simulation (DNS). The simulations are performed at a pressure of 40 atmospheres and at oxidiser temperatures of 700, 900, 1100, 1300, and 1500 K, while keeping the lift-off length approximately fixed by varying the inlet velocity. At this pressure, DME exhibits two stage ignition below approximately 1100 K and a negative temperature coefficient (NTC) regime from approximately 800–1100 K. The DNS results are investigated by considering the thermochemical structure of the flames and by applying a transport budget analysis to key ..

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University of Melbourne Researchers

Grants

Awarded by Combustion Energy Frontier Research Center, an Energy Frontier Research Center - US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences


Awarded by United States Department of Energy


Funding Acknowledgements

This work was supported by the Australian Research Council (ARC). The work at Sandia National Laboratories was supported by the Combustion Energy Frontier Research Center, an Energy Frontier Research Center funded by the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences under Award No. DE-SC0001198. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94AL85000. The research benefited from computational resources provided through the National Computational Merit Allocation Scheme, supported by the Australian Government. The computational facilities supporting this project included the Australian NCI National Facility, the partner share of the NCI facility provided by Intersect Australia Pty Ltd., the Peak Computing Facility of the Victorian Life Sciences Computation Initiative (VLSCI), iVEC (Western Australia), and the UNSW Faculty of Engineering.