The importance of turbulence intensity, eddy size and flame size in spark ignited, premixed flame growth
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Burning velocity, Eddy size, Flame size, Turbulence
The effects of laminar burning velocity, turbulence intensity, flame size and eddy size on the turbulent burning velocity of a premixed growing flame were experimentally separated in a 125 mm cubical chamber with lean methane - air mixtures spark ignited at 1 atm and 300 K. The turbulence was up to 2 m/s with 1 to 4 mm Taylor microscale. For the near unity Lewis number and near zero Markstein number mixture considered here, the turbulent burning velocity, St, can be approximated as: St = Sl + Cd(r/λ)u′, where Sl is the laminar burning velocity, r is the mean flame radius, λ is the Taylor microscale, u′ is the root mean square (r.m.s.) turbulence intensity and Cd is a constant of the order 0.02. © IMechE 1997.
Ting, D. S.K. and Checkel, M. D.. (1997). The importance of turbulence intensity, eddy size and flame size in spark ignited, premixed flame growth. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 211 (1), 83-86.