What does the turbine do in a gas turbine engine?

The turbine in a gas turbine engine is responsible for converting thermal energy into mechanical energy. This process occurs after fuel and air have been mixed and combusted, producing high-temperature, high-pressure exhaust gases. The turbine captures some of the energy from these exhaust gases and uses it to drive the compressor, as well as to produce thrust in jet engines.

The conversion of thermal energy to mechanical energy is a fundamental operation of the turbine. As the hot gases expand and flow through the turbine, they cause the turbine blades to spin. This rotation is what ultimately provides power to the components of the engine, allowing it to function efficiently. This mechanical energy is also crucial for maintaining the process of compressing incoming air, as the turbine is connected to the compressor, helping sustain the engine's operation.

This function is a vital aspect of gas turbine engines, exposing core principles of propulsion and energy transformation used in many aviation and industrial applications.