2.3   The effect of clearances on real designs


Blade efficiencies are far from ideal and the main causes of this are aerodynamic factors. The three most important factors are profile loss, secondary loss and tip leakage loss. These are of roughly the same magnitude whilst other sources of aerodynamic loss, such as windage and lacing wires, are much smaller.

2.3.1. Profile loss

2.3.2. Secondary loss

2.3.3. Tip leakage

2.3.4. Disc windage

2.3.5. Lacing wires

2.3.6. Other losses

2.3.7. Wetness loss

2.3.8. Annulus loss

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