Gas turbine vane

Claim 1

A gas turbine vane comprising: an outer vane member of hollow vane shape having flank walls, an exterior surface and an inner wall surface, the inner wall surface having a plurality of spaced-apart projections thereon extending in a vane chordwise direction; an insertion member of hollow shape having flank wall parts and being inserted into said outer vane member and tightly engaged with said projections; a turbulence chamber formed between said outer vane member at a leading edge part thereof and said insertion member; means for carrying cooling fluid from said turbulence chamber to a plurality of rear exhaust ports, said carrying means comprising a plurality of cooling passages which are laterally distinct from one another formed between said outer vane member, said insertion member, and said projections; first fluid injection means for injecting fluid into said turbulence chamber; second fluid injection means positioned intermediate between said turbulence chamber at the flank wall parts of said insertion member and said exhaust ports for feeding injecting fluid into each of said cooling passages to further cool a trailing edge portion of said outer vane member; flow restricting means disposed in each of said cooling passages to control the length of time spent by said fluid in said turbulence chamber and to control the pressure of said fluid in said turbulence chamber; and means for film cooling the exterior surface of said outer vane member, said film cooling means including a plurality of slots positioned at the flank wall of said outer vane member and means for allowing one-way flow of fluid between said cooling passages and the exterior surface of said outer vane member.