312 / 2018-07-11 21:36:38

Evaluating the laminar burning velocity of ethyl acetate

全体主题 > 生物质液体燃料

Ethyl acetate (EA) is a prospective liquid biofuel with low carbon emissions and is considered as a good additive for gasoline. In regard to this, it can enhance the octane number of gasoline and consequently the thermal efficiency as well as the output power of engine. The constant volume method (CVM) has the capability of predicting laminar burning velocities relatively identical to practical engine relevant conditions. Moreover, it can be used to validate and improve the chemical kinetics of fuels. The CVM (pressure trace) has been used to assess the laminar burning velocity of ethyl acetate (initial pressure (1 atm), initial temperature (358 K) and equivalence ratios (0.8-1.4)) in this study. The CVM methods involve the linear approximation and the non-linear analytical x(p) relations analysis. The CVM results were compared to EA constant pressure (CPM) data of this work and literature data. Additionally, the CVM laminar burning velocities were compared to CANTERA numerical simulations of EA. The CVM results, CPM dataset, and the simulated results showed consistency. Comparing the CVM (linear and non-linear x(p)) results to the CPM data a maximum percentage deviation of 25% and a minimum difference of 9% were obtained for the equivalence ratios of 0.8-1.4. The simulated burning velocities were about 27% higher than the CVM results when they were compared. In general, the CVM laminar burning velocities were close to the CPM data to a certain extent. Further, the linear CVM result and the CVM (reduced specific heat ratio (k_b, reduced)) agreed well, particularly at richer mixtures. The CVM methods have been compared to investigate which of the methods somewhat accurately predicts EA burning velocities and was found that the percentage difference between both methods was about 7% when they were compared in this treatise.