Direct numerical simulation of turbulent premixed jet flames: Influence of inflow boundary conditions

MC Ma; M Talei; RD Sandberg

Journal article

Direct numerical simulation of turbulent premixed jet flames: Influence of inflow boundary conditions

MC Ma, M Talei, RD Sandberg

Combustion and Flame | Elsevier | Published : 2020

DOI: 10.1016/j.combustflame.2019.11.040

Abstract

Direct Numerical Simulations (DNS)s of a low Karlovitz number turbulent premixed round jet flame are performed to determine the impact of the turbulence inflow conditions on the flame characteristics. This is accomplished by providing the first flame with a fully developed turbulent inflow via simulation of the upstream pipe and the coflow region, while the inflow boundary condition in the second flame is generated with a digital filter-based method without including the upstream region. The two databases are then thoroughly compared to reveal any differences resulting from the different inflow boundary conditions. The turbulence kinetic energy is observed to drop shortly downstream of the s..

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University of Melbourne Researchers

Mohsen Talei Author Mechanical Engineering

Richard Sandberg Author Mechanical Engineering

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Grants

Awarded by Australian Research Council

Funding Acknowledgements

This study was supported by the Australian Government's National Computational Merit Allocation Scheme, Energy and Resources Scheme, and the Pawsey Supercomputing Centre with funding from the Australian Government and the Government of Western Australia. Man-Ching Ma was supported by the Melbourne Research Scholarship from the University of Melbourne. Mohsen Talei acknowledges the support by the Australian Research Council (ARC) (grant DE180100416).