Comparison of Methane Combustion Mechanisms Using Shock Tube and Rapid Compression Machine Ignition Delay Time Measurements
P. Zhang, I. Gy. Zsély, V. Samu, T. Nagy, T. Turányi
Energy Fuels,
35, 12329–12351 (2021)
Publication Date: July 9, 2021
https://doi.org/10.1021/acs.energyfuels.0c04277-
We intended to collect all published experimental data on the ignition methane - oxygen mixtures, with possible added fuel: H2 and CO; possible diluents: N2, Ar, He). These included shock tube and RCM data (5521 data points in 643 datasets from 76 publications), covering wide ranges of temperature T, pressure p, equivalence ratio φ, and diluent concentration. Thirteen recent methane combustion mechanisms were tested against these experimental data.
Design of combustion experiments using differential entropy
Éva Valkó, Máté Papp, Márton Kovács, Tamás Varga,
István Gy. Zsély, Tibor Nagy, Tamás Turányi
Combustion Theory and Modelling,
26, 67-90 (2022)
Publication Date: November 9, 2021
https://doi.org/10.1080/13647830.2021.1992506-

The
aim of several combustion experiments is the determination of the rate
coefficients of important elementary reactions. Sheen and Manion (J.
Phys. Chem. A, 118 (2014) 4929–4941) suggested a method for the design
of shock tube experiments based on differential entropy. Their method
was modified and extended in this work. In the extended method, both the
experimental and residual errors of the measurements are considered at
the calculation of the posterior uncertainty of the determined rate
parameters, the differential entropy matrix is calculated in an
analytical way and the net information flux value is calculated for each
suggested experimental point. In an iterative procedure, all
investigated experimental points with negative net information flux
values are discarded and the remaining experimental conditions are
recommended for the measurements. The most valuable candidate
experimental points can be determined based on the net information flux
values.