Combustion apparatus and gas turbine engine

Abstract

A combustion apparatus includes a combustion chamber, a pre-chamber and a first device for mixing a fuel with an oxidant, the first device being located upstream of the pre-chamber. The combustion chamber and the pre-chamber share a common first and second wall spaced to each other building a cavity. The first wall exhibits at least one first opening in the area of the combustion chamber for introducing a coolant into the cavity. Further, the combustion apparatus has a channel for feeding the oxidant to the first device, whereby the channel is formed by a housing element of the combustion apparatus and the common first wall of the combustion chamber and the pre-chamber. The at least one first opening is located in the area of the combustion chamber. The first wall exhibits at least one second opening, located in the area of the pre-chamber, for introducing the coolant into the cavity.

1 - 14 . (canceled) 
     
     
         15 . A combustion apparatus, comprising:
 a combustion chamber in which combustion of a fuel-oxidant-mix takes place;   a pre-chamber located upstream of the combustion chamber;   a first device for mixing a fuel with an oxidant, the first device being located upstream of the pre-chamber;
 wherein the combustion chamber and the pre-chamber comprise a common first wall and a common second wall spaced to each other building a cavity; 
 wherein the first wall exhibits at least one first opening in the area of the combustion chamber for introducing a coolant into the cavity; 
   a channel for feeding the oxidant to the first device, whereby the channel is formed by a housing element of the combustion apparatus and the common first wall of the combustion chamber and the pre-chamber;   wherein the at least one first opening is located in the area of the combustion chamber, wherein the first wall exhibits at least one second opening for introducing the coolant into the cavity, and wherein the at least one second opening is located in the area of the pre-chamber.   
     
     
         16 . The combustion apparatus according to  claim 15 , wherein the common first wall and the common second wall have the same shape. 
     
     
         17 . The combustion apparatus according to  claim 15 , wherein the coolant is the oxidant flowing through the channel and being introduced through the at least one first opening and the at least one second opening into the cavity. 
     
     
         18 . The combustion apparatus according to  claim 15 , wherein the second wall exhibits at least one third opening for outputting the coolant from the cavity to the combustion chamber and/or the pre-chamber. 
     
     
         19 . The combustion apparatus according to  claim 15 , wherein the first device is arranged in such a way that the coolant is introduced from the cavity into the first device, wherein the first device is adapted for receiving the coolant from the cavity. 
     
     
         20 . The combustion apparatus according to  claim 15 , further comprising:
 a second device located between the first device and the cavity, the second device being adapted for outputting the coolant to the first device and/or the pre-chamber.   
     
     
         21 . The combustion apparatus according to  claim 15 , further comprising:
 a second device located in the cavity, the second device being adapted for outputting the coolant to the first device and/or the pre-chamber.   
     
     
         22 . The combustion apparatus according to  claim 20 , wherein the second device outputs the coolant radially or axially into the pre-chamber or outputs the coolant axially into the first device. 
     
     
         23 . The combustion apparatus according to  claim 20 , wherein the second device comprises a swirler, in particular a radial swirler or an axial swirler. 
     
     
         24 . The combustion apparatus according to  claim 20 , wherein the first device and the second device are integrally formed. 
     
     
         25 . The combustion apparatus according to  claim 21 , wherein the second device outputs the coolant radially or axially into the pre-chamber or outputs the coolant axially into the first device. 
     
     
         26 . The combustion apparatus according to  claim 21 , wherein the second device comprises a swirler, in particular a radial swirler or an axial swirler. 
     
     
         27 . The combustion apparatus according to  claim 21 , wherein the first device and the second device are integrally formed. 
     
     
         28 . The combustion apparatus according to  claim 15 , wherein the first device comprises a swirler. 
     
     
         29 . The combustion apparatus according to  claim 15 ,
 wherein a separation element is placed in the cavity dividing the cavity into a first cavity and a second cavity,   wherein the first cavity is formed by the first common wall and the separation element,   wherein the second cavity is formed by the separation element and the second common wall,   wherein, at the upstream side of the first cavity and the second cavity, the cavities are connected with each other by a coolant communicating pathway,   wherein the at least one first opening is arranged at the downstream end of the first cavity, and   wherein a fourth opening is arranged at the downstream end of the second cavity or vice versa.   
     
     
         30 . The combustion apparatus according to  claim 15 , wherein the coolant is an oxidant, in particular air. 
     
     
         31 . A gas turbine engine, comprising:
 a combustion apparatus according to  claim 15 .