Wot graphs????
You are doing it wrong!
You just use a little guestimation and it all comes right in the end... Seems to me that around 50 percent of the air just goes straight through for cooling turbine blades and combustor, so there should be lots of air in that tailpipe to oxydise me extra Jet-A or kerosine??? Engine burns so well that there is no source of ignition in the tailpipe! Just needs needs the extra sprayed fuel "lighting"... A plug doesn't seem to do the trick, so next step is to pour a stream of neat unatomised fuel via a small steel pipe into the combustion chamber at one edge. It should burn and stream right through the turbine and out the back... And ignite the afterburner???