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

Experimental and numerical laminar syngas combustion
Stretch (s -1 )
200
150
100
50
φ
1.2
1.0
0.8
0.6
0
1 2 3 4 5 6 7
Pressure (bar)
Figure 4.32 – Stretch rate versus pressure for updraft syngas-air mixture at 1.0 bar.
tel-00623090, version 1 - 13 Sep 2011
Stretch (s -1 )
200
150
100
50
0
1 2 3 4 5 6 7
Pressure (bar)
Figure 4.33 – Stretch rate versus pressure for downdraft syngas-air mixture at 1.0 bar.
200
φ
1.2
1.0
0.8
0.6
Stretch (s -1 )
150
100
50
0
1.0
0.8
0.6
1 2 3 4 5 6 7
Pressure (bar)
φ
Figure 4.34 – Stretch rate versus pressure for fluidized bed syngas-air mixture at 1.0 bar.
These figures show a very similar behavior of the stretch rate versus pressure for all
the syngas–air mixtures and equivalence ratios. Stoichiometric mixtures are highly
stretched and stretch decreases with the equivalence ratio. The criterion of establishing
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