Experimental and modelling study of the effect of elevated pressure on ethane and propane flames

摘要: Laminar burning velocities, SL, of ethane + air and propane flames within an equivalence ratio range between 0.8 1.3 were determined at atmospheric elevated pressures up to 4 atm. Measurements performed in non-stretched flames, stabilized on a perforated plate burner adiabatic conditions, created using the heat flux method. Initial unburnt gas temperature was 298 K. These new experimental results compared with available literature data predictions three kinetic schemes: USC Mech II, San Diego mechanism Aramco 1.3. The models behave differently reproducing SL closer agreement present measurements. pressure dependence laminar velocities analysed expression = SL0(P/P0)β. Large deviations derived power exponent, β, observed for different datasets model To elucidate these differences performance mechanisms, sensitivity analyses velocity exponent β performed. It demonstrated that may serve as independent target validation improvement. When comparing coefficients from previous measurements methane, ethane, n-pentane method, important similarities found lean conditions large disparity rich mixtures. Neither experiments nor modelling support linear alkanes.