What is meant by an "engine rotor assembly"?

The term "engine rotor assembly" refers specifically to the combination of the compressor and turbine rotors that are mounted on a common shaft within a jet engine or turbine engine. This assembly plays a critical role in the engine's operation, as it is responsible for compressing incoming air (in the case of the compressor) and harnessing the hot gases produced during combustion to produce thrust or power (in the case of the turbine).

The compressor rotor is designed to compress air and increase its pressure before it enters the combustion chamber, facilitating efficient fuel combustion. The turbine rotor, on the other hand, extracts energy from the high-temperature, high-pressure gases that exit the combustion chamber, which then drives the compressor and propels the aircraft.

Understanding the engine rotor assembly is crucial for grasping how jet engines function, considering it is integral to both the air intake and power generation processes within the engine.