What is the function of 13th stage air?

The function of 13th stage air is primarily associated with cooling the second stage high-pressure (HP) turbine. As gas turbines operate, temperatures can become exceedingly high, especially in the turbine sections, which can negatively impact performance and longevity. The 13th stage air is strategically routed to cool critical turbine components, ensuring they operate within safe temperature limits. This cooling process helps maintain efficiency and prevents damage due to thermal stress.

The role of the 13th stage air in this context is significant, as maintaining the integrity and functionality of the HP turbine is crucial for the overall performance of the gas turbine system. This cooling procedure contributes to the reliability and durability of the turbine, ultimately enhancing its operational lifespan.