What are the two basic elements of a turbine assembly in a turbojet engine?

A turbine assembly in a turbojet engine consists of two fundamental elements: the stator and the rotor. The rotor is the moving part that converts the energy from the high-temperature, high-pressure gas coming from the combustion process into mechanical energy, which is used to drive the compressor and other components of the engine. The rotor blades spin as the exhaust gases pass over them, generating thrust.

The stator, on the other hand, is fixed and provides a guiding structure for the gas flow. It serves to convert the kinetic energy from the gas into a more usable form and directs the flow onto the rotor blades at the correct angle for optimal efficiency. Together, these components work in harmony to extract energy from the exhaust gases and maintain efficient engine performance.

In contrast, the other options refer to different components that serve distinct functions within the overall engine assembly. While the compressor and turbine are crucial parts of a turbojet engine, they represent broader sections of the engine rather than the specific elements of the turbine assembly. The combustor and injector are focused on the combustion process, whereas the fan and nozzle pertain more to the airflow management and thrust generation in different engine types, not limited to the turbine assembly itself.