Question 16Gas Turbine - 1st Asst/Chief70% to pass
Once a compressor is broken in, which of the following factors will most likely cause blade tips to rub?
AI Explanation
The correct answer is D) Failure of a rotor bearing.
Once a compressor is broken in, a failure of a rotor bearing is the factor that is most likely to cause the blade tips to rub. This is because a failed rotor bearing can lead to shaft misalignment, which in turn can cause the blade tips to come into contact with the stator case, resulting in rubbing and potential damage.
The other answer choices are not as directly related to the blade tip rubbing issue. Sprayed material in the stator case, elongation of the blade tips, or profiles on the blade tips may contribute to compressor issues, but they are not the primary cause of blade tip rubbing after the initial break-in period.
Related Questions
#14 What type of gas turbine cycle configuration is shown in the illustration? Illustration GT-0031 #15 Compressor tip clang can be usually attributed to which of the following operating conditions? #17 What type of metallurgical failure does Item B represent in the illustration? Illustration GT-0014 #18 Compressor rotor blade tip curl is usually caused by which of the following? #19 You are conducting a borescope inspection of the compressor section of a GE LM2500 gas turbine. In stage four, you see a slight tilt to one blade and the blade platform is raised higher than the other blades. What could be a cause of this condition and what would be your course of action?