What is the second purpose of turbine nozzles?

The function of turbine nozzles is crucial in the operation of gas turbine engines, as they play a significant role in directing the flow of exhaust gases. The primary purpose of turbine nozzles is to convert the thermal and pressure energy of the high-temperature exhaust gases into kinetic energy. This is achieved by reducing the pressure of the gases and increasing their velocity, allowing them to expand and accelerate as they flow through the nozzle.

By effectively deflecting gases in the direction of turbine wheel rotation, the nozzles ensure that the flow of these gases strikes the turbine blades at optimal angles. This maximization of energy transfer enhances the efficiency of the turbine, ultimately contributing to the overall performance of the engine. The design of the nozzles is engineered to ensure that the exhaust gases are channeled efficiently, which is essential for both performance and operational efficiency.

Other options, while they relate to aspects of engine operation, do not accurately represent the function of turbine nozzles. For example, nozzles do not store fuel or actively prevent sound pollution. Regulating engine temperature is a function that involves various components of the engine, such as cooling systems and sensors, rather than the turbine nozzles themselves.