Fig. 6. Laminar flame speed of H2/iC8H18 binary fuel blends predicted by different models (Tu = 423 K, P = 1 atm). The prediction of model II is very close to that Nilotinib of model III so that these two lines are nearly overlapped.Figure optionsDownload full-size imageDownload as PowerPoint slide
3.2. Markstein length and minimum ignition energy
Propagation of spherical flames for iC8H18/H2/air mixtures are numerically simulated by A-SURF so that the Markstein length and MIE are obtained. Fig. 7 shows the normalized flame speed as a function of Karlovitz number for stoichiometric iC8H18/H2/air mixtures. Only the results among flame radius 1.5 ? Rf ? 2.0 cm are presented so molecular biology the ignition effect at small flame radius and pressure rise at large flame radius can be avoided. There is a negative linearity between the stretched flame speed and the Karlovitz number. Therefore, positive Markstein length can be obtained from linear extrapolation based on Eq. (2).