ef501527z_si_003.txt (203.55 kB)
Shock-Tube Measurements and Kinetic Modeling Study of Methyl Propanoate Ignition
dataset
posted on 2015-12-17, 05:54 authored by Zihang Zhang, Erjiang Hu, Lun Pan, Yizhen Chen, Jing Gong, Zuohua HuangIgnition
delay times of methyl propanoate (MP) were measured in a shock tube
over the temperature range of 1040–1720 K, pressures of 1.2–10
atm, fuel concentrations of 0.5–2.0%, and equivalence ratios
of 0.5–2.0. Through multiple linear regression, a correlation
for the tested ignition delay times was obtained, and the measured
data were also compared to the previous data. Two available MP models
(Princeton model and Westbrook model), were used to simulate the experimental
data. Results suggest that further modifications on the available
MP models are necessary. The modified MP model, consisting of 318
species and 1668 reactions, was proposed on the basis of previous
studies, and it gives better prediction on the MP ignition delay times
under all tested conditions than those of the other two available
models. The modified MP model was further validated against the MP
pyrolysis data and laminar flame speeds, and reasonable agreements
were achieved. Sensitivity analysis reveals that the small radical
reactions play key important roles in MP high-temperature ignition,
while some fuel-specific reactions also exhibit relatively large sensitivity
coefficients. Reaction pathway analysis indicates that MP is dominantly
consumed through the H-abstraction reactions.