Methane Laminar Flame Speed Measurement at High Gas Temperature Using Rapid Compression Machine-Flame (RCM-Flame)
2022
Goyal, Tushar | Samimi-Abianeh, Omid
An outwardly expanding spherical flame speed has been studied using a constant volume chamber, a spherical bomb, and a shock tube. However, the literature reports very few laminar flame speed measurements at high gas temperatures relevant to the combustion system conditions. Therefore, this research primarily focuses on measuring the laminar flame speeds at high gas temperatures using a new experimental technique called rapid compression machine flame (RCM-Flame). The laminar flame speeds were measured using a stoichiometric mixture of methane, oxygen, and argon at an average compressed gas pressure of 3.04 bar and a range of gas temperatures from 740 to 765 K. The effects of the RCM chamber size, ignition energy, and temperature inhomogeneity on the flame propagation process were investigated by performing both one-dimensional (1D) and three-dimensional (3D) numerical modeling. The AramcoMech 3.0-detailed kinetic model was reduced under the studied conditions by considering ignition delay times and flame speeds to perform 3D numerical modeling. The linear extrapolation method of expanding a spherical flame showed that laminar flame speeds obtained through the experiments agree well with simulated data generated using 1D and 3D numerical modeling.
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