Reaction zone characteristics of iso-pentanol swirl spray flames using OH-PLIF and 2C-LII

This paper focuses on the reaction zone and soot emission characteristics of swirl spray flames iso-pentanol blends. OH planar laser induced fluorescence (PLIF) measurements were used to study lift-off local extinction features. Soot was investigated using time-resolved two-colour incandescence (2C-LII) diagnostic technique. Fuels in this n-heptane, iso-pentanol, ethanol blends n-heptane/iso-pentanol n-heptane/ethanol. Different operating conditions tested categorized into three flame types including stable, near blow-off, far away from blow-off. A clear double sheet structure appeared most flames, referred as inner outer regions study. Also, all other than pure displayed an open-up a cone-like “V” shape. Results stable blow-off showed that addition n-heptane caused become more attached bluff-body. In increased occurrence extinctions. Whereas decreased occurrences extinction. Across conditions, impact height by less n-heptane. found compared mixture. volume fraction flame, reduced fractions lower level flame.