Experimental and surrogate modeling study of gasoline ignition in a rapid compression machine

摘要: Abstract The use of gasoline in Homogeneous Charge Compression Ignition engines has propelled the need to better understand compression ignition processes for under engine-like conditions. In order quantify low-temperature heat release and provide fundamental validation data chemical kinetic models, it is imperative study autoignition phenomena well-controlled However, there a significant lack delay low temperature regime. Recognizing information at high pressures low-to-intermediate temperatures, this work aims fill void by conducting an experimental Rapid Machine (RCM) characterize response gasoline + air mixtures over wide range temperatures 20 40 bar with equivalence ratios ranging from 0.3 1.0. Results RCM experiments are also simulated using four-component surrogate model which includes n -heptane, iso -octane, toluene, 2-pentene. For conditions investigated, good agreement between model, terms first-stage total times as well comparison measured pressure traces, demonstrated. Kinetic analysis further conducted role different hydrocarbon classes present controlling autoignition.