Engine wall structure and a method of producing an engine wall structure

Abstract

An engine wall structure includes an inner wall to which hot gas is admitted during engine operation, an outer wall, which is colder than the inner wall during engine operation, and at least two webs that connect the inner wall with the outer wall and delimit a cooling duct between the walls. The webs are mainly formed by a first material and the inner wall is mainly formed by a second material of other composition and other heat conductivity than the first material.

1 - 15 . (canceled) 
   
   
       16 . An engine wall structure that comprises an inner wall, to which hot gas is admitted during engine operation, an outer wall, which is colder than the inner wall during engine operation, and at least two webs that connect the inner wall with the outer wall and delimit a cooling duct between the walls, wherein the webs are mainly comprised by a first material and that the inner wall is mainly comprised by a second material of other composition and other heat conductivity than the first material. 
   
   
       17 . An engine wall structure according to  claim 16 , wherein the composition of the material of the webs is substantially equal to the composition of the material of the outer wall. 
   
   
       18 . An engine wall structure according to  claim 16 , wherein the material of the inner wall has higher heat conductivity than the material used for the webs. 
   
   
       19 . An engine wall structure according to  claim 16 , wherein the inner wall comprises a copper or a copper-based alloy, and that the webs comprises steel. 
   
   
       20 . An engine wall structure according to  claim 16 , wherein the material of the inner wall has a higher temperature resistance than the material of the webs. 
   
   
       21 . An engine wall structure according to  claim 16 , wherein the material of the webs has higher heat conductivity than the material of the inner wall. 
   
   
       22 . An engine wall structure according to  claim 21 , wherein the inner wall comprises steel and that the webs comprises aluminum or an aluminum-based alloy. 
   
   
       23 . An engine wall structure according to  claim 16 , wherein the material of the outer wall and the material of the webs have corresponding heat conductivity properties. 
   
   
       24 . An engine wall structure according to  claim 16 , wherein the material of the outer wall and the material of the webs have corresponding properties as to their mechanical strength. 
   
   
       25 . An engine wall structure according to  claim 16 , wherein the engine wall structure defines a thrust nozzle wall of a rocket engine. 
   
   
       26 . An engine wall structure according to  claim 16 , wherein the first material is deposited onto the inner wall by electro-deposition.