Turbine blade
An aerofoil for a gas turbine engine, the aerofoil comprises a leading edge and a trailing edge, pressure and suction surfaces and defines therebetween an internal passage for the flow of cooling fluid therethrough. A particle deflector means is disposed within the passage to deflect particles within a cooling fluid flow away from a region of the aerofoil susceptible to particle buildup and subsequent blockage, such as a cooling passage for a shroud of a blade.
1. An aerofoil for a gas turbine engine, the aerofoil comprising:
a leading edge; and
a trailing edge;
pressure and suction surfaces; and
defines therebetween an internal passage for a flow of cooling fluid therethrough, wherein
the internal passage contains a particle deflector to deflect particles within the flow of cooling fluid away from a region of the aerofoil susceptible to particle buildup and subsequent blockage, wherein
the region of the aerofoil susceptible to particle buildup and subsequent blockage is a cooling hole defined in the aerofoil, wherein
the aerofoil comprises a shroud portion, wherein the shroud portion defines the cooling hole.
2. An aerofoil for a gas turbine engine, the aerofoil comprising:
a leading edge; and
a trailing edge;
pressure and suction surfaces; and
defines therebetween an internal passage for a flow of cooling fluid therethrough, wherein
the internal passage contains a particle deflector to deflect particles within the flow of cooling fluid away from a region of the aerofoil susceptible to particle build up and subsequent blockage, wherein
the region of the aerofoil susceptible to particle buildup and subsequent blockage is a cooling hole defined in the aerofoil, wherein
the entry to the cooling hole is nearer the leading edge than an entry to a dust hole.
3. An aerofoil for a gas turbine engine, the aerofoil comprising:
a leading edge; and
a trailing edge;
pressure and suction surfaces; and
defines therebetween an internal passage for a flow of cooling fluid therethrough, wherein
the internal passage contains a particle deflector to deflect particles within the flow of cooling fluid away from a region of the aerofoil susceptible to particle build up and subsequent blockage, wherein
the aerofoil comprises at least one radially extending fin mounted on a radially outer part of the aerofoil.
4. An aerofoil as claimed in claim 3 , wherein
an outlet of a cooling hole is downstream of the at least one radially extending fin.
5. An aerofoil as claimed in claim 3 , wherein
an outlet of a dust hole is downstream of at least one radially extending fin.