WALL STRUCTURE FOR DRIVE DEVICE WALL COOLED BY FUEL

PROBLEM TO BE SOLVED: To provide wall structure for a driving device wall cooled by fuel having practically higher longevity and safety of work at proper structural cost by remarkably reducing thermally indued stress. SOLUTION: Wall structure has a supporting structural body 7, this support structural body is constituted of an inwall 10 on which hot gas hits, an external wall 13 with an interval from this inwall and a web 16 to connect both of the walls to each other and to divide a wall intermediate space into cooling passages 19, and the wall structure has a supporting structure of a type of at least one stable outside cylinder 25. A cooling structural body 4 has slits 22 in a range of each of the webs 16 from outside, and these slits 22 are led to a region of the inwall 10 through the external wall 13 and a web center. The support structural body 7 is designed to be ealstically flexible in a region making its boundary at least with the cooling structural body 4 and has an interval against the cooling structural body 4.