Etude de la combustion de gaz de synthèse issus d'un processus de ...

Chapter 4
0.5
0.4
φ =1.0
Su (m/s)
0.3
0.2
Updraft
Dow ndraf t
0.1
Fluidized
0.0
0 100 200 300 400 500 600
κ (s -1 )
0.5
φ=1.2
0.4
tel-00623090, version 1 - 13 Sep 2011
Su (m/s)
0.3
0.2
0.1
0.0
Updraft
Downdraft
0 100 200 300 400 500 600 700
κ (s -1 )
Figure 4.18b – Stretched burning velocity versus stretch rate for syngas-air mixtures at various
equivalence ratios.
The unstretched laminar burning velocity, S , shown in Fig. 4.19 is derived from the
value of the unstretched flame speed and the expansion factor which is evaluated
using the adiabatic flame calculation via the Gaseq code package, which can be found
in the Appendix B.
0
u
S 0 u (m/s)
0.4
0.3
0.2
Updraft
Dow ndraft
Fluidized
0.1
0
0.6 0.8 1 1.2
Equivalence ratio
Figure 4.19- Unstretched flame speed versus equivalence ratio of syngas-air mixtures.
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