Liquid-cooled transition member to turbine inlet

摘要

An improved structure is provided for liquid cooling a transition member which conducts hot motive gases from a combustor to a turbine inlet in a gas turbine power plant. The liquid-cooled structure includes a transition member body having a longitudinal inlet manifold and a longitudinal collection manifold attached to opposite sides of the body. The body has a plurality of internal laterally disposed passages which communicate liquid coolant from the inlet manifold, around the body to the collection manifold. The liquid coolant transfers heat from the member in a circumferential flow pattern; then the coolant is discharged from the member by a discharge manifold which is connected to the collection manifold. The method of manufacturing of the transition member provides for forming the body in two mating half subassemblies having internal coolant passages. Each half of the body is blanked from a flat sheet having a shape conforming to the developed shape of the body. Lateral slots are machined on the surface of the sheet. The coolant passages are formed by diffusion bonding a metallic skin over the slotted surface in one method and by embedding tubular members in the slots in an alternate method. The subassemblies are then formed into the contoured shape of the body. The subassemblies and components forming the manifolds are welded together to form the transition member.