Question 18Gas Turbine - 1st Asst/Chief70% to pass
Compressor rotor blade tip curl is usually caused by which of the following?
AI Explanation
The correct answer is D) Blade rub.
Blade rub is the primary cause of compressor rotor blade tip curl. When the compressor blades come into contact with the casing or surrounding components, it can lead to excessive friction and wear, causing the blade tips to curl or deform. This blade-to-case rub is a common issue in compressor systems and is typically caused by factors such as thermal expansion, rotor imbalance, or mechanical wear.
The other options are not the primary causes of blade tip curl. Misalignment (A) can contribute to blade rub, but it is not the direct cause. Object damage (B) and vane rub (C) may also occur in compressor systems, but they are not the primary reasons for the specific issue of blade tip curl.
Related Questions
#16 Once a compressor is broken in, which of the following factors will most likely cause blade tips to rub? #17 What type of metallurgical failure does Item B represent in the illustration? Illustration GT-0014 #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? #20 When tip clang takes place on a gas turbine engine, the major damage occurs to what area of the blade? #21 A compressor blade platform that is tilted or raised may indicate which of the following failures?