Originally Posted by
SLFMS
I think you may be overthinking it. Simply put more fuel = hotter.
there’s a lot going on in the engine, for one higher N1/Ng will mean higher intake temp.
Also primary combustion uses only approximately 20% of the compressed air then around 20% secondary air is used to complete combustion the rest is mostly used to cool the engine. I suspect part of your answer may come from the proportion of this ratio as it changes for different fuel flows and is not linear compared to compressor speed but that would be a guess.
A running engine with flat pitch will burn less than half the fuel but the compressor isn’t spinning at half the speed.
I agree 100% with the first part. I actually tried to find a chart showing the temperature gradient of compressed air. The only thing i could find were a few statements saying compressed air is approximately 500c.