Annihilation events topology and their generated sound in turbulent premixed flames

Davy Brouzet; Ali Haghiri; Mohsen Talei; Michael J Brear

Journal article

Annihilation events topology and their generated sound in turbulent premixed flames

Davy Brouzet, Ali Haghiri, Mohsen Talei, Michael J Brear

Combustion and Flame | Elsevier | Published : 2019

DOI: 10.1016/j.combustflame.2019.02.028

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Abstract

The Combustion Institute This paper studies the contribution of flame annihilation events to the sound radiated by turbulent, premixed flames. Previously published direct numerical simulation (DNS) datasets of stoichiometric and lean (ϕ=0.7) flames (Haghiri et al. 2018) are first examined using an efficient formulation of the method of Griffiths et al. (2015) to identify the annihilation events. Four classes of annihilation event are observed. Three of these - pocket burn-out, tunnel closure and tunnel formation - were defined by Griffiths et al. A ‘multi-feature’ event is also defined in this paper as any combination of the other three annihilation events occurring close enough such that th..

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University of Melbourne Researchers

Ali Haghiri Author Mechanical Engineering

Mohsen Talei Author Mechanical Engineering

Michael Brear Author Science

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Grants

Awarded by Australian Research Council (ARC)

Funding Acknowledgements

This work was supported by the Australian Research Council (ARC) [grants DP120101830 and DE180100416] and the University of Melbourne through a Melbourne International Research Scholarship and a Melbourne International Fee Remission Scholarship. The research benefited from computational resources provided through the National Computational Merit Allocation Scheme and the Pawsey Energy and Resources Scheme, supported by the Australian Government. The computational facilities supporting this project included the Australian NCI National Facility and the Pawsey Supercomputing Center.