What percentage of air from the compressor is actually used for combustion?

The correct answer is that approximately 30% of the air from the compressor is used for combustion in a gas turbine engine. In gas turbine systems, the compressor is responsible for compressing a large volume of incoming air to increase its pressure and density before it enters the combustion chamber.

Typically, the amount of air that is actually utilized for combustion does not need to be the entirety of the compressed air. A substantial portion is bypassed to ensure that there is sufficient airflow for cooling and to maintain optimal operating temperatures. The 30% figure reflects a balance between having enough fuel-air mixture for efficient combustion while also allowing for enough airflow to support engine functions and cooling requirements.

Using this percentage supports the engine's performance by optimizing efficiency and power output, as well as managing exhaust temperature. This understanding is crucial for Gas Turbine Systems Technicians as they work with the systems, ensuring they can troubleshoot and optimize engine performance effectively.