|May 14, 2014, 06:56||
Gas turbine combustor modelling - uburned fuel at the outlet
Join Date: Feb 2012
Location: Leeds, UK
Posts: 79Rep Power: 6
I am modelling a DLE micro gas turbine combustor using the partially premixed model in Fluent.
I have noticed that using the steady flamelet model with GRI3.0 chemical mechanism the temperature at the combustor outlet is significantly underpredicted. After a short investigation, I found that I have a significant percentage of uburned fuel at the outlet (mass fraction of CH4 at the outlet is about 3e-3 which is very high).
The same problem is present using Chemical equilibrium approach instead of the steady flamelet.
I do not face this problem using the eddy dissipation model (CH4 at the outlet is of the order of e-8, as it should be) and the outlet temperature value is correct.
Any idea on what is going on with the partially premixed model?
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