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Convection cooling of a turbine blade works by

  • A.Circulating fuel through the blade
  • B.Passing compressor air through internal passages in the blade
  • C.Forming an air film over the external surface
  • D.Radiating heat to the casing

Answer: B

The air picks up heat from the internal walls and is then discharged, usually at the trailing edge or the tip. It is the simplest of the cooling schemes and is normally combined with film cooling on the most heavily loaded blades.

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