Why are loose-fitting blades used on the...

Question 1 / 205eccef9fbacbc34ba4d46b73

Question 1 of 205eccef9fbacbc34ba4d46b73

Why are loose-fitting blades used on the first several stages of large axial compressors?

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5eccef9fbacbc34ba4d46b73

Why are loose-fitting blades used on the first several stages of large axial compressors?

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🔍 Key Concepts

• Axial compressor blade tip clearance and why small clearances improve efficiency • Effect of centrifugal force and thermal expansion on rotor blades as speed and temperature increase • Difference between a design feature and a malfunction/abnormal condition

💭 Think About

• Ask yourself what happens to the rotor, casing, and blades of a large gas turbine compressor as it accelerates from low RPM to full RPM in terms of growth and movement. • Which answer choices describe something that would be intentionally built into the compressor for normal operation, rather than to fix or tolerate a fault? • How could allowing blades to move slightly in their root or attachment help keep the gap between blade tips and casing where the designer wants it?

✅ Before You Answer

• Eliminate any options that imply malfunction or damage as the primary reason for the design feature. • Consider which option is most clearly about maintaining compressor efficiency and proper internal clearances during all operating speeds. • Verify that the chosen choice matches what you know about how centrifugal force pushes blades outward and why designers care about the gap between blade tips and casing.

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Question 1 of 20

Why are loose-fitting blades used on the first several stages of large axial compressors?

To compensate for a malfunctioning compressor support bearing.

To compensate for the abrasive action of the blade tips.

To minimize vibration while the engine is passing through critical speed ranges.

To maintain close tolerances in the compressor.

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Question 1 / 205eccef9fbacbc34ba4d46b73

Question 1 of 205eccef9fbacbc34ba4d46b73

Why are loose-fitting blades used on the first several stages of large axial compressors?

Back

Question 1 of 20

5eccef9fbacbc34ba4d46b73

Why are loose-fitting blades used on the first several stages of large axial compressors?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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