Numerical and experimental investigation of the laminar burning velocity of biofuels at atmospheric and high-pressure conditions

摘要: Abstract Premixed flame characteristics play a crucial role in most advanced combustion applications, such as gas turbines, aircraft combustors or internal engines. The laminar burning velocity is one key parameter to determine the stabilisation and propagation of premixed flames. This study examined influence high pressures on biofuels correlation between pressure. investigated were pure ethanol state-of-the-art surrogate, iso-butanol possible alternative several blends ethanol/iso-octane. Due usage two methods measure – Heat Flux burner closed vessel comparison was added for atmospheric conditions. measured velocities conducted equivalence ratios from 0.7 1.3, pressure range 1 bar(a) 15 bar(a) 373 K. results further compared existing numerical mechanisms literature data. reveal prediction performances 0.2 cm/s (0.4%) 5.2 cm/s (16.2%) dedicated 0.9 1.1. show deviations 2.3 cm/s (4.9%) 6.7 cm/s (11.4%).