With an increase of compressor discharge pressure, what happens to the fuel flow?

When the compressor discharge pressure increases, the fuel flow generally increases as well. This is due to the relationship between the air-fuel ratio and the pressure of the air entering the combustion chamber. As the compressor generates higher pressure, it allows more air to be fed into the engine. In internal combustion engines, this increased airflow necessitates an increase in fuel flow to maintain the appropriate air-fuel ratio for optimal combustion.

When the pressure is higher, the engine can intake more air molecules, which means that more fuel must also be injected to ensure that the combustion process remains efficient and effective. Therefore, for an optimal operation and to avoid conditions such as running lean, the fuel flow must rise alongside the compressor’s increased discharge pressure to match the increased air intake.

While other options might contain elements of how fuel flow could change under different conditions, the fundamental principle in this scenario is that an increase in compressor discharge pressure leads directly to an increased requirement for fuel flow to support the higher combustion demands.