What component is critical for cooling turbine blades and nozzle blades in gas turbines?

The component that is critical for cooling turbine blades and nozzle blades in gas turbines is the Compressor Discharge Pressure (CDP). The high-pressure, high-temperature air from the compressor is utilized in various cooling systems for the turbine components. This air, which is maintained at a specific pressure and temperature, can be directed into cooling passages within the blades to absorb heat and maintain operational integrity.

By using CDP for cooling, the turbine blades can be safeguarded against thermal damage, allowing for higher efficiency and longevity of the turbine. Elevated cooling capabilities enable the turbine to operate under more extreme conditions without risking failure, which is crucial for performance and reliability.

The other options do not play a direct role in the cooling of turbine blades. Fuel injectors are involved in the combustion process, condenser units are related to the heat exchange processes primarily in steam systems, and air filters serve to clean the intake air but do not contribute specifically to blade cooling.