Direct numerical simulation of turbulent lean methane-air bunsen flame with mixture inhomogeneities
KAUST DepartmentMechanical Engineering Program
Physical Science and Engineering (PSE) Division
Clean Combustion Research Center
Permanent link to this recordhttp://hdl.handle.net/10754/625546
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AbstractDirect Numerical Simulations of three-dimensional spatially developing turbulent slot Bunsen burner methane/air flames are performed. Three flames are simulated; they differ for the level of premixing of the fuel inlet: one has a fully premixed inlet, the other two have a partially premixed inlet that mimic a common injection strategy in stationary gas turbines. The jet consist of a methane/air mixture with global equivalence ratio ɸ = 0.7 and temperature of 800 K. The simulations are performed at 4 atm. The grid has a resolution of 20 μ m resulting in a total of 350 million points. Supporting simulations were performed to generate the inflow conditions for the jet. The velocity field and a fuel/air field were extracted from a fully developed channel simulation with scalar injection. Chemistry is treated with a new skeletal chemical mechanism developed specifically for the DNS. The data are analyzed to study possible influences of partial premixing on the flame structure and the combustion efficiency.
CitationLuca S, Attili A, Bisetti F (2016) Direct Numerical Simulation of Turbulent Lean Methane-Air Bunsen Flames with Mixture Inhomogeneities. 54th AIAA Aerospace Sciences Meeting. Available: http://dx.doi.org/10.2514/6.2016-0189.
SponsorsResearch reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST). The authors acknowledge valuable support from KAUST Supercomputing Laboratory (KSL) in the form of computational time on the CRAY XC40 “Shaheen".
Conference/Event name54th AIAA Aerospace Sciences Meeting, 2016