Question 26Gas Turbine - Assistant Engineer70% to pass
How is the HP turbine rotor of the GE LM2500 gas turbine cooled?
AI Explanation
The correct answer is C) By a continuous flow of compressor discharge air.
The HP (high-pressure) turbine rotor of the GE LM2500 gas turbine is cooled by a continuous flow of compressor discharge air. This air is bled from the compressor section and directed to the HP turbine section to provide cooling for the turbine blades and other critical components. This cooling method helps maintain the structural integrity and performance of the HP turbine under the high temperatures and stresses it experiences during operation.
The other answer choices are incorrect because: A) The lube oil system does not directly cool the HP turbine rotor. B) The ship's seawater cooling system is not used to cool the HP turbine. D) An air-to-air heat exchanger is not the primary cooling method for the HP turbine rotor.
Related Questions
#24 Which of the following components prevent(s) objects smaller than 1/4 inch from entering the GE LM2500 gas turbine engine? #25 Which of the following statements is true concerning the fuel oil ignition system of the gas turbine engine shown in the illustration? Illustration GT-0017 #27 Where are the carbon dioxide nozzles located in the GE LM2500 gas turbine enclosure? #28 What is the primary purpose of the diffuser and distributor on the GE LM2500 gas turbine? #29 How many shock mounts are used to secure the GE LM2500 gas turbine enclosure to the ship's foundation?