Large eddy simulation of methane–air deflagration in an obstructed chamber using different combustion models

2012 ◽  
Vol 25 (4) ◽  
pp. 730-738 ◽  
Author(s):  
Xiaoping Wen ◽  
Minggao Yu ◽  
Zhichao Liu ◽  
Wence Sun
Keyword(s):  
Large Eddy Simulation ◽  
Combustion Models ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals Numerical analysis of lifted hydrogen flame

2018 ◽  
Vol 240 ◽  
pp. 01014
Author(s):  
Sohail Iqbal ◽  
Björn Pfeiffelmann ◽  
Ali Cemal Benim ◽  
Franz Joos
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Large Eddy Simulation ◽  
Single Step ◽  
Turbulence Modelling ◽  
Combustion Models ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Hydrogen Flame ◽  
Laminar Flamelet

A numerical analysis of a turbulent lifted H2/N2 flame is presented. As combustion mechanisms, a large spectrum is considered including single-step and two-step, as well as detailed mechanisms. As combustion models, various models are considered that treat turbulence-chemistry interaction in different ways, including the Eddy Dissipation Concept and the Laminar Flamelet Method. For turbulence modelling Reynolds Averaged Numerical Simulation and Large Eddy Simulation approaches are used. Results are compared with measurements.

Including Heat Loss and Quench Effects in Algebraic Models for Large Eddy Simulation of Premixed Combustion

2012 ◽  
Author(s):  
Roman Keppeler ◽  
Michael Pfitzner ◽  
Luis Tay Wo Chong ◽  
Thomas Komarek ◽  
Wolfgang Polifke
Keyword(s):  
Experimental Data ◽  
Large Eddy Simulation ◽  
Heat Loss ◽  
Combustion Model ◽  
Algebraic Models ◽  
Combustion Models ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Wall Interaction ◽  
Swirl Flame

In technically relevant combustion devices, combustion can take place in the vicinity of walls which can significantly affect the reaction and the heat transfer. However, only few studies focus on modelling of flame-wall interaction (FWI) for algebraic combustion models and virtually none consider FWI for algebraic Large Eddy Simulation combustion models. In the present work heat loss models, as previously published in the literature, are employed to extend a LES algebraic combustion model. The performance of the FWI models is evaluated by simulations of a nonadiabatic swirl flame. The simulation results are compared with experimental data of velocity field and heat release. The extent of the quenching zone and heat loss effects are determined in the simulations and compared with data from direct numerical simulations. Comparison of simulation and experimental data shows a significant improvement when heat loss effects are incorporated. Also the characteristic Peclet numbers are correctly predicted by FWI models.

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