Effect of ethanol addition on the laminar burning velocities of gasoline surrogates

Laminar burning velocities (LBV) and Markstein lengths of spherical flames n-heptane (H), iso-octane (O), ethanol (E) their binary ternary mixtures (in equal volume fractions) at elevated pressures temperatures are experimentally investigated. Measurements performed in a constant combustion vessel using two distinct techniques: flame front imaging pressure rise rate. For pure components, shows higher LBV compared to same conditions. A dependence on each component is observed where found have the strongest dependence. This also indicated by negative coefficients three-body termination reactions through sensitivity analysis. mixtures, EH mixture was highest LBVs other blends. The present EO blend lower OH due competing against H radical pool. Non-linear behaviour mixture’s verified chemical kinetics suggesting widely used mixing rules for blends might need additional improvements, especially temperatures. An EHO be similar 380 K. At 450 K, differ 7% atmospheric pressure, but ethanol’s dependence, this difference decreases zero as increases 4 bar. • Burning EPRF components shown pressures. presented Flame rate methods show consistent results. Ethanol displays strong Mixing fail