Impact of Turbulence Intensity and Equivalence Ratio on the Burning Rate of Premixed Methane–Air Flames

Energies

Gordon Fru¹  Dominique Thévenin² 

[1] Laboratory of Fluid Dynamics and Technical Flows, Institute of Fluid Dynamics and Thermodynamics, University of Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany;

关键词: premixed turbulent combustion;    turbulent burning speed;    fuel consumption rate;    equivalence ratio;    Direct Numerical Simulations;    intense turbulence;   

DOI  :  10.3390/en4060878

来源: mdpi

【 摘 要 】

Direct Numerical Simulations (DNS) have been conducted to study the response of initially laminar spherical premixed methane–air flame kernels to successively higher turbulence intensities at five different equivalence ratios. The numerical experiments include a 16-species/25-step skeletal mechanism for methane oxidation and a multicomponent molecular transport model. Highly turbulent conditions (with integral Reynolds numbers up tovaries with the mixture equivalence ratio, showing that additional parameters should probably enter phenomenological expressions relating these two quantities.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.