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

Chapter 6
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Experimental
30
Numerical
Pressure (bar)
20
10
0
180 210 240 270 300 330 360
Crank Angle (degrees)
tel-00623090, version 1 - 13 Sep 2011
Figure 6.8 - Comparison between experimental and numerical in-cylinder pressure during
compression of downdraft syngas without combustion.
From figure 6.8 is seen that the Woschni model works well in its original formulation
and represent the heat transfer of the RCM compression stroke.
6.3.2.4 Turbulent burning velocity
As reported in section 3.2.5 the turbulence intensity was experimentally determined for
the RCM, and was implemented in the code in the expression (6.26) for validation
proposes. The laminar burning velocity formulation obtained in the section 4.1.2.3 was
also used to close expression (6.26).
6.3.2.5 Results and discussion
Figures 6.9-6.10 show experimental and numerical cylinder pressure for typical
downdraft syngas-air mixture and methane-air mixture for various ignition timings,
respectively.
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