Effects of Soret diffusion on the laminar flame speed and Markstein length of syngas/air mixtures

On the accuracy of laminar flame speeds measured from outwardly propagating spherical flames: Methane/air at normal temperature and pressure

“…Detailed chemistry is efficiently handled in A-SURF with the help of algorithms introduced in [59,60]. A-SURF has been successfully used in previous studies on ignition and flame propagation (e.g., [61][62][63][64]). The details on governing equations, numerical schemes, and code validation can be found in [31,41].…”

Effects of Soret diffusion on spherical flame initiation and propagation

“…[18,19] for a summary of previous studies on this subject. Recently, Liang et al [20,21] have examined the Soret diffusion effects on the ignition and propagation of H 2 /CO/air flames through numerical simulation with detailed chemistry and transport. It was found that the minimum ignition energy and stretched flame speed are greatly affected by the Soret diffusion [20,21].…”

“…The numerical studies [11][12][13][14][15][16][17][18][19][20][21] mentioned above indicated discernable effects of Soret diffusion in combustion with species that are very light or very heavy. Unfortunately, numerical simulation is usually constrained to specific fuel and hence the conclusion is lack of generality.…”

The effect of depletion of radicals on freely propagating hydrocarbon flames

“…To analyse the stability of the travelling combustion waves the governing equations (4) are linearised near the travelling wave solution in order to obtain the linear stability problem which describes the evolution of the infinitely small perturbations of the travelling wave. We seek the solution of the form u(ξ, t) = u(ξ ) + v(ξ ) exp(λt + i K y), where u(ξ ) represents the travelling combustion wave, terms proportional to the small parameter are the linear perturbation terms, λ is the increment of exponential growth of perturbation, K is the wave number of the perturbation in the direction, orthogonal to the propagation direction along x axis.…”

“…It is known that such processes as Soret diffusion [2][3][4][5][6][7][8], radical-wall interaction [9][10][11][12][13][14][15][16][17], adding of flame inhibitors/flame suppressants [18,19] can affect the concentration of radicals in the In hydrocarbon flames the inclusion of Soret diffusion affects the mass fluxes of light components of reacting mixtures, mainly, H and H 2 [2][3][4][5][6][7]. In freely propagating flames it is sufficient to consider the thermal diffusion of H radicals, which causes the additional flux of H atoms in the downstream direction.…”