Laminar flame characteristics and kinetic modeling study of methanol-isooctane blends at elevated temperatures

摘要: Abstract Laminar flame speeds of methanol-isooctane blends were experimentally determined using the spherically propagating in a constant volume chamber at two initial temperatures (363 and 393 K), different blending ratios methanol liquid (0%, 20%, 40%, 80%, 100%), over equivalence 0.7–1.6. Nonlinear methodology was employed to remove stretch effect data processing. Results indicate that laminar reach peak ratio around 1.2 isooctane 1.1. For mixtures with less than 40% methanol, show moderate increase all ratios. However, further increasing addition will greatly accelerate rich mixture sides but give slight change lean sides. Markstein length shows an tendency larger critical value while gives decrease smaller value. The is between 1.3. Among thermal effect, diffusive kinetic found be major factor bringing variation speed ratio. A model (IM model) developed on basis Chaos et al. (2007). IM good prediction measured under conditions. Reaction pathway reveals HCO H productions are promoted stable species inhibited case into sides, resulting enhancement. These behaviors verified from sensitivity analysis concentrations reactive radicals.