Rob
Ansys Employee

If you're hitting the limiter then it's definitely running very hot; I assume you're not expecting flame temperatures in that range?  Work through the boundary conditions, chemistry etc to see if it's all set correctly and the residuals are showing it's converged. 


Post some images of the flow field, temperature etc as ANSYS staff cannot review case files: do this with node values on & off. We may spot something. If you also add the case & data someone in the wider community may be able to help too.