What is the major function of the turbine assembly in a turbojet engine?

What is the major function of the turbine assembly in a turbojet engine?

• A. Increases exhaust velocity for thrust.
• B. Supplies the power to turn the compressor.
• C. Burns fuel to produce energy.
• D. Compresses the intake air.

Answer: (B)

The turbine assembly’s major function is to extract energy from the hot, high-pressure exhaust gases to drive the engine’s compressor through a shaft. As the gases expand through the turbine, they transfer some of their energy to the turbine blades, causing the turbine to spin. This rotational energy is transmitted via a connected shaft to the compressor, which then draws in and compresses the incoming air for the next combustion cycle. In other words, the turbine supplies the power that keeps the compressor turning, maintaining the engine’s overall operation. Fuel burning happens in the combustor, not the turbine. The compressor is the part that actually increases the air’s pressure, powered by the turbine, not by the turbine trying to increase exhaust velocity directly. The exhaust velocity does contribute to thrust, but the turbine’s role is to provide the energy to run the compressor, not to accelerate the exhaust.

The turbine assembly’s major function is to extract energy from the hot, high-pressure exhaust gases to drive the engine’s compressor through a shaft. As the gases expand through the turbine, they transfer some of their energy to the turbine blades, causing the turbine to spin. This rotational energy is transmitted via a connected shaft to the compressor, which then draws in and compresses the incoming air for the next combustion cycle. In other words, the turbine supplies the power that keeps the compressor turning, maintaining the engine’s overall operation.

Fuel burning happens in the combustor, not the turbine. The compressor is the part that actually increases the air’s pressure, powered by the turbine, not by the turbine trying to increase exhaust velocity directly. The exhaust velocity does contribute to thrust, but the turbine’s role is to provide the energy to run the compressor, not to accelerate the exhaust.