Question 97Gas Turbine - 1st Asst/Chief70% to pass
To prevent overheating of the illustrated turbine blade, which of the following fluids is circulated through it via the shaped internal passages? Illustration GT-0029
AI Explanation
The correct answer is D) Bleed air.
The turbine blade in the illustration GT-0029 is likely part of a gas turbine engine, which is commonly used in aircraft and ships. To prevent overheating of the turbine blade, bleed air from the engine's compressor section is circulated through the shaped internal passages within the blade. This bleed air acts as a coolant, absorbing heat from the blade and preventing it from overheating during operation.
The other options, such as cooling water (A) or cooling oil (B), are not typically used for turbine blade cooling in this type of application. External compressed air (C) could also be used, but bleed air from the engine's own compressor section is the more common and efficient cooling method.
Related Questions
#95 Which of the following is the most probable cause if, while underway, the main propulsion gas turbine air intake blow-in doors open? #96 In which of the following ways can compressor surge cause excessive temperatures in the turbine section? #98 As shown in the illustration, the HP turbine 2nd stage blades are cooled by convection, with the cooling air being discharged at which of the following? Illustration GT-0011 #99 In the marine gas turbine engine shown in the illustration, the 9th stage bleed air is used for which of the following? Illustration GT-0017 #100 In the marine gas turbine engine shown in the illustration, the 13th stage bleed air is used for which of the following? Illustration GT-0017