I am running diesel spray and combustion model.Unpremixed/Diffusion, EBU LATCT. I tried to calculate NOx concentration with EGR rate 5%, 10%, 15% and 20%, setting respectively initial conditions for air with CO2 concentration. However, for all of these models, I get the same temperature and NOx values. I checked all time steps, but either the values are the same, or they differ very little. For example, if EGR is 20%, NOx reduction is supposed to be about 50%. But, I can not get even close to this fact. Perhaps, I need to use different model settings. Does anybody know this problem? Please advise.

Regards

I am running diesel spray and combustion model.Unpremixed/Diffusion, EBU LATCT. I tried to calculate NOx concentration with EGR rate 5%, 10%, 15% and 20%, setting respectively initial conditions for air with CO2 concentration. However, for all of these models, I get the same temperature and NOx values. I checked all time steps, but either the values are the same, or they differ very little. For example, if EGR is 20%, NOx reduction is supposed to be about 50%. But, I can not get even close to this fact. Perhaps, I need to use different model settings. Does anybody know this problem? Please advise.

Regards

Pls provide the details of initialisation of scalars for O2 and N2 concentration of intake, cylinder, and exhaust and also provide boundary O2 and N2 concentration details of intake and exhaust

[hkoten]

hi
how do you use ebu for unpremixed model,
did you close cfm or ecfm models in esice
hkoten@hotmail.com