초록 ▼

Methods of making cylindrical structures with cooling channels, such as, for example, combustor/transition pieces for gas turbines having a double wall with a plurality of cooling channels, both axially and, in some cases, circumferential cross-flow passages positioned between the structure's inner

Methods of making cylindrical structures with cooling channels, such as, for example, combustor/transition pieces for gas turbines having a double wall with a plurality of cooling channels, both axially and, in some cases, circumferential cross-flow passages positioned between the structure's inner member and the outer member to provide cooling air thereto, are disclosed. The cooling channels are formed in the area between the inner member of the structure and the outer member thereof. The passages preferably extend both axially and circumferentially with respect to the direction of flow through the structure. The axial passages extend completely from one end to the other and the circumferential passages extend around the circumference of the structure.

대표청구항 ▼

[ What is claimed is:] [1.] A method for making double-wall structures having integral internal channels, comprising:assembling a double-wall assembly comprising an inner wall, channel forming means, sacrificial channel filling means and an outer wall, wherein the inner wall and the outer wall are c

[ What is claimed is:] [1.] A method for making double-wall structures having integral internal channels, comprising:assembling a double-wall assembly comprising an inner wall, channel forming means, sacrificial channel filling means and an outer wall, wherein the inner wall and the outer wall are complementary to one another and separated by the channel forming means that is placed between and in touching contact with them to define at least one channel, and wherein the sacrificial channel filling means is complementary to the channel forming means and placed into the channel forming means to fill the at least one channel, such that the double-wall assembly comprises a substantially solid structure;wherein the assembling the at least one channel further comprises forming at least one stepwise offset for promoting turbulent fluid flow through the at least one channel;hot pressing the double-wall assembly at a temperature and for a time sufficient to cause the inner wall, outer wall and channel forming means to become metallurgically bonded to one another; andremoving the sacrificial channel filling means.