What is the function of a high pressure turbine in a gas turbine engine?

In a gas turbine engine, the high-pressure turbine plays a crucial role in the overall operation by driving the compressor. The high-pressure turbine is connected to the compressor through a shaft, and as the turbine spins, it harnesses energy from the high-temperature, high-pressure gases produced during combustion. This energy is effectively utilized to turn the compressor, which is responsible for compressing the incoming air before it enters the combustion chamber.

The function of the high-pressure turbine is vital for maintaining the airflow required for efficient combustion, and thus, for the overall performance of the engine. Without the high-pressure turbine effectively driving the compressor, the engine would not be able to generate the necessary pressure to sustain its operation, leading to inefficiency or failure to function altogether.