Question 149Gas Turbine - Assistant Engineer

The correct answer is D) Nozzle assembly. The nozzle assembly in a turbine engine is the circle of stationary vanes that convert the pressure and thermal energy of the combustion gases into velocity energy. This directed flow of high-velocity gases then impinge on the turbine wheel, causing it to spin and generate rotational power. The other answer choices are incorrect because: A) The rotor assembly refers to the rotating components of the turbine, not the stationary nozzle vanes. B) The diffuser assembly is responsible for decelerating the air flow, not directing it onto the turbine wheel. C) The compressor assembly compresses the air entering the engine, not the turbine section.