🔍 Key Concepts

• Blade tip leakage in reaction turbines • Differences between impulse and reaction turbine stages • Purpose of shrouding and how it’s attached to blades

💭 Think About

• Ask yourself in which type of turbine (impulse or reaction) tip leakage is a major concern and why. • Consider whether ‘thin tipping’ would be more about flow control at the tip, structural support for shrouds, or changing the effective area of the blade. • Think about whether any turbine blade design could truly prevent any pressure drop through moving blades in an impulse turbine.

✅ Before You Answer

• Verify which option specifically mentions tip leakage and whether that is linked to reaction turbines in your study materials. • Check if shrouding necessarily requires a special thin-tip design, or if it can be mounted in other ways. • Confirm from your notes whether thin tipping is associated with aerodynamic/hydraulic loss reduction at the blade tips rather than increasing area or eliminating pressure drop.