Effects of Particle Size on the Ignition of Static CH₄/Air and H₂/Air Mixtures by Hot Particles

Analysis of the ignition of hydrogen/air mixtures induced by a hot particle

“…Then, the critical ignition temperature T ig can be extrapolated based on the exponential relationship between t ig and T p , i.e., t ig = c/ln(T p /T ig ), where c is a constant. 17 The T ig for hot particle induced ignition in H 2 /air mixtures at room temperature and atmospheric pressure has been reported in the existing numerical and experimental studies, which provides additional benchmark results to verify the present theoretical model. Fig.…”

“…Recently, simulations considering detailed chemistry and transport have been conducted for particle-induced ignition of different fuels. [14][15][16][17] It is demonstrated that chemical kinetics play important roles in determining the minimum ignition temperature of the hot particle.…”

“…Nevertheless, most experimental and numerical studies [10][11][12][13][14][15][16][17][18][19] on the ignition of hydrogen by hot particles are restricted to certain conditions e.g., initial temperature, pressure and equivalence ratio. For practical interest, it is attractive to derive an expression that can quantitatively describe the ignition behaviour over a wide range of relevant parameters.…”

Theoretical analysis on the ignition of a combustible mixture by a hot particle

“…(2017); and the simulation results are from Beyer & Markus (2012), Häber et al. (2017) and Wang & Chen (2020). …”

“…They found that the critical ignition temperature varies widely among different fuels and increases consistently as the equivalence ratio approaches the ignition limit. Wang & Chen (2020) conducted transient one-dimensional simulations on the ignition of CH 4 /air and H 2 /air mixtures by an inert hot particle, and found that the ignition delay time strongly depends on the particle size. Besides, Wang et al.…”