What percentage of airflow is allocated for cooling, seal pressurization, and ship's service use?

The allocation of airflow for cooling, seal pressurization, and ship's service use is critical in the operation of gas turbine systems. Typically, a significant percentage of the total airflow produced by the gas turbine engine is dedicated to purposes other than combustion. This includes ensuring the turbine components remain within safe operating temperatures, providing necessary seal pressurization to prevent leaks of gases or fluids, and meeting additional design requirements for ship's service systems, which might use bleed air for various operational functions.

In this context, 70% of the airflow being utilized for these auxiliary functions reflects a typical distribution seen in many gas turbine propulsion systems. This high percentage underscores the importance of maintaining the integrity and efficiency of the engine while also supporting the auxiliary systems that are essential for overall performance and safety. Such a distribution supports operational effectiveness in maritime settings, where both the gas turbine engine performance and the associated systems functioning are crucial.