Question 42Gas Turbine - 1st Asst/Chief70% to pass
How is the HP turbine rotor of the GE LM2500 gas turbine engine cooled?
AI Explanation
The correct answer is D) By a continuous flow of compressor discharge air.
The HP turbine rotor of the GE LM2500 gas turbine engine is cooled by a continuous flow of compressor discharge air. This is a common cooling method for high-pressure turbine components in gas turbine engines. The compressor discharge air is channeled through internal passages within the turbine rotor to absorb heat and prevent the rotor from overheating during operation.
The other options are incorrect because: A) The ship's service seawater cooling system is typically used for other engine components, not the HP turbine rotor. B) Synthetic lube oil is used for lubrication, not cooling of the turbine rotor. C) An air-to-air heat exchanger is not the primary cooling method for the HP turbine rotor in this engine design.
Related Questions
#40 The struts of the compressor front frame provide passages for all of the following mediums EXCEPT for which of the following? #41 The power turbine (PT) of the GE LM2500 gas turbine engine has a total of how many stages? #43 If after reducing power to a gas turbine engine in response to a high lube oil supply temperature alarm, the temperature continues to rise, your next step should be which of the following? #44 Which of the following is the most likely cause for the main propulsion gas turbine engine tripping during start up? #45 During an operation of a main propulsion gas turbine, the engine shuts down. Which of the following is the most probable reason for the shutdown?