An increase in clearance between reaction...

An increase in clearance between reaction...

Question 1 of 270705eccefa0bacbc34ba4d470cf

An increase in clearance between reaction blade tips and the turbine casing will result in __________.

Question 1 of 27070

Q

An increase in clearance between reaction blade tips and the turbine casing will result in __________.

🔍 Key Concepts

• Effect of increased blade tip clearance on efficiency and power in a reaction turbine • How leakage flow past blade tips changes the useful work done by the rotor • Difference between thrust load, torque, pressure drop, and vibration in a turbine

💭 Think About

• Imagine more space between blade tips and casing: where can steam go now, and does that steam still push effectively on the blades? • Which option describes a change that is directly tied to how much useful force the steam can apply on the rotor instead of bypassing it? • Think about whether increased clearance would make the flow smoother or leakier, and how that affects the rotor’s ability to turn.

✅ Before You Answer

• Be clear on what rotor torque is (twisting force on the shaft) versus rotor thrust (axial force along the shaft). • Consider whether tip leakage increases or decreases when clearance increases, and how that affects blade loading. • Decide which choice reflects a loss of effective energy transfer from the steam to the rotor, rather than a secondary effect like noise or vibration.