What happens to thrust at higher engine speeds in jet engines?

At higher engine speeds, thrust increases rapidly with small increases in RPM due to the relationship between engine speed, airflow, and combustion dynamics. As the engine speed rises, more air enters the engine, leading to improved airflow through the engine's various components. This increase in airflow enhances the fuel-air mixture, allowing for more efficient combustion and greater thrust production.

Moreover, at higher RPMs, the turbine can extract more energy from the exhaust gases, which contributes to an increase in thrust output. This principle is primarily observed in turbojet and turbofan engines where a significant amount of thrust is generated by the high-speed exhaust jet produced from the combustion process. As such, small increases in engine speed can result in substantial increases in thrust, a characteristic that is critical for engine performance and efficiency during takeoff and climb phases of flight.