Flame behaviour and flame location in large-eddy simulation of the turbulent premixed combustion

The lean premixed flame of a fuel mixture in a jet flow combustor was computationally investigated, and results were compared with experimental data at a constant thermal load of 9 kW and constant equivalence ratio of 0.588. Three variables, namely, the amplitude of pulsation, frequency (f), and the...

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Bibliographic Details
Published in:Energy (Oxford) 2021-10, Vol.232, p.121067, Article 121067
Main Authors: Alhumairi, Mohammed KH Abbas, Almahdawi, Yasseen A., Nawi, Sami A.
Format: Article
Language:English
Subjects:
Combustion
Combustion chambers
Equivalence ratio
Flame holders
Flow rates
Fuel mixtures
Jet flow
Large eddy simulation
Lean premixed flame
Mass flow rate
Premixed flames
Sine waves
Thermal analysis
Topology
Turbulence
V-shaped flame
Vortices
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Summary:The lean premixed flame of a fuel mixture in a jet flow combustor was computationally investigated, and results were compared with experimental data at a constant thermal load of 9 kW and constant equivalence ratio of 0.588. Three variables, namely, the amplitude of pulsation, frequency (f), and the mass flow rate ratio (MFRR) of the inlet region, were considered to describe the turbulent effect and investigate the topology and location of the flame that represent the characteristics of sinusoidal wave inlet velocity. Results showed that flame topology strongly depended on varying the turbulence parameters examined, especially f and MFRR. The V-shaped flame with corrugated wings formed in the vicinity of the flame holder reflected the turbulence–combustion interaction in all test cases. The suggested large-eddy simulation (LES) model was suitable in predicting the flame location and flame topology associated with pulsating jet flow. •Power generation system for industrial devices application.•Simulation-based premixed combustion optimization approach.•The utilization of a lean premixed flame of propane–air mixture in a jet flow combustor.•V-shaped flame and the turbulence–combustion interaction analysis.
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2021.121067