Troels Dyhr Pedersen.indd - Solid Mechanics

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250
200
150
100
50
40 % EGR
No EGR
50 % EGR 60 % EGR
65 % EGR
70 % EGR
0
CAD
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Figure 10: Heat release, DME + EGR at 1000 RPM
250
200
150
100
50
40 % EGR
No EGR
COMPARISON WITH SIMULATIONS
50 % EGR 60 % EGR
65 % EGR
70 % EGR
0
CAD
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Figure 11: Heat release, DME + EGR at 1800 RPM
A 0-D CHEMKIN II simulation was made for the 1000 RPM tests. The CHEMKIN model used was the 0-D
closed homogeneous IC engine reactor. The model was setup with the same parameters as the engine tested.
Heat transfer was modeled with the built-in Woschni correlation.
For the experiment with methanol, mole fractions of methanol and DME identical to those used in the test were
implemented in a parameter study. The reactor initial temperature was decreased with increasing equivalence
ratio of methanol according to figure 1. The result of the simulation has been plotted in figure 12.
Heat release [J/CAD]
Heat release [J/CAD]