Experimental analysis of laser-induced spark ignition of lean turbulent premixed flames: New insight into ignition transition

2013 ◽  
Vol 160 (8) ◽  
pp. 1414-1427 ◽  
Author(s):  
Céline Cardin ◽  
Bruno Renou ◽  
Gilles Cabot ◽  
Abdelkrim Mourad Boukhalfa
Keyword(s):  
Experimental Analysis ◽  
Premixed Flames ◽  
Spark Ignition ◽  
Turbulent Premixed Flames ◽  
Insight Into ◽  
Turbulent Premixed

Experimental analysis of laser-induced spark ignition of lean turbulent premixed flames

2013 ◽  
Vol 341 (1-2) ◽  
pp. 191-200 ◽  
Author(s):  
Céline Cardin ◽  
Bruno Renou ◽  
Gilles Cabot ◽  
Abdelkrim Boukhalfa
Keyword(s):  
Experimental Analysis ◽  
Premixed Flames ◽  
Spark Ignition ◽  
Turbulent Premixed Flames ◽  
Turbulent Premixed

scholarly journals Modelling of Conditional Scalar Dissipation Rate in Turbulent Premixed Combustion

Computation ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 26 ◽  
Author(s):  
Shokri Amzin ◽  
Mariusz Domagała
Keyword(s):  
Dissipation Rate ◽  
Premixed Flames ◽  
Moment Closure ◽  
Navier Stokes ◽  
Scalar Dissipation ◽  
Flame Surface ◽  
Scalar Dissipation Rate ◽  
Turbulent Premixed Flames ◽  
Conditional Moment ◽  
Turbulent Premixed

In turbulent premixed flames, for the mixing at a molecular level of reactants and products on the flame surface, it is crucial to sustain the combustion. This mixing phenomenon is featured by the scalar dissipation rate, which may be broadly defined as the rate of micro-mixing at small scales. This term, which appears in many turbulent combustion methods, includes the Conditional Moment Closure (CMC) and the Probability Density Function (PDF), requires an accurate model. In this study, a mathematical closure for the conditional mean scalar dissipation rate, <Nc|ζ>, in Reynolds, Averaged Navier–Stokes (RANS) context is proposed and tested against two different Direct Numerical Simulation (DNS) databases having different thermochemical and turbulence conditions. These databases consist of lean turbulent premixed V-flames of the CH4-air mixture and stoichiometric turbulent premixed flames of H2-air. The mathematical model has successfully predicted the peak and the typical profile of <Nc|ζ> with the sample space ζ and its prediction was consistent with an earlier study.

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