Patent ID: 7850428
Filing Date: 2010-12-14
Classification: F01D,F05D,Y02T

Abstract:
1. An aerofoil comprising: a root portion; a tip portion located radially outwardly of the root portion; leading and trailing edges extending between the root portion and the tip portion; an internal cooling passage; and a plurality of cooling fluid discharge apertures extending between the root portion and the tip portion in a trailing edge region to discharge cooling fluid from the internal cooling passage to an outer surface of the aerofoil in the trailing edge region during use and provide a cooling film in the trailing edge region, the plurality of cooling fluid discharge apertures comprising first, second and third apertures, a distance being defined between each aperture and the trailing edge, wherein said distance for the second aperture is less than the distance for each of the first and third apertures so that the flow rate of the cooling fluid discharged from the internal cooling passage to the outer surface trailing edge region varies between the root portion and the tip portion.