You need to decrease thermal image of the engine. ACE has three stream airflow system. The third stream is primarily there to serve as a thermal management heat sink.I dont get why ACE is required for 6th gen... It is just a way to achieve better fuel economy/performance. not every country needs it
This engine will give better range, speed and acceleration with a lot of dry thrust that is nearing 30K lbf level. That is more than a f110 on continuous afterburner mode. To use high power Directed Energy Weapons and long range Aesa radars the plane needs to be able to generate ample amounts of power. Whilst doing that it needs to be able to sustain it’s thrust delivery without hindrance.
You need equal amount of thrust when you are at sea level and at 60000ft without straining the engine. A turbojet will suffer at sea level. Also a Turbofan will be straining at 60000ft. This engine behaves like a high bypass turbofan at sea level and behaves more like a turbojet at 60000ft whilst smoothly transitioning from one to the other without compromising stealth characteristics. During this process all turbulence and heavy shuddering of engine and plane that can happen in certain cases, is eliminated. The so called “harmonic resonance,” has been an unwanted occurrence with the F135 even causing a F35B to crash.