BURNER FOR A TURBINE
A burner for a turbine has a flame tube, a casing enclosing the flame tube forming an oxidant collection chamber, a burner bottom which bounds the oxidant collection chamber and the combustion space, and a swirler which has a plurality of guide vanes arranged so that the distances between the guide vanes form a plurality of radial inlet passages to the combustion space. A fuel supply pipe is provided in the inlet flow region of at least some of the inlet passages, which fuel supply pipe extends lengthwise through the respective inlet passage in an axial direction of the burner and traverse to an oxidant flow direction, and wherein each fuel supply pipe has in its wall at least one radial fuel output opening by which fuel can be mixed into the respective inlet passage with a directional component extending transverse to the oxidant flow direction.
1 - 7 . (canceled)
11 . A burner for a turbine comprising:
a flame tube ( 10 ) defining a combustion space ( 11 );
a casing ( 20 ) enclosing said flame tube ( 10 ) from radially outward at a predetermined distance from said flame tube ( 10 ) and forming an oxidant collection chamber ( 21 ) between said flame tube ( 10 ) and said casing ( 20 );
a burner bottom ( 30 ) bounding said oxidant collection chamber ( 21 ) and said combustion space ( 11 ) at an axial end of said burner;
a swirler ( 40 ) arranged axially between said flame tube ( 10 ) and said burner bottom ( 30 ) axially adjoining said burner bottom ( 30 ) and radially adjoining said oxidant collection chamber ( 21 ) for supplying a fuel-oxidant mixture into said combustion space ( 11 ), said swirler ( 40 ) comprising a plurality of guide vanes ( 41 ) arranged at a circumferential distance from one another along a circumferential direction (UR) of said burner so that the respective distances between said guide vanes ( 41 ) form a plurality of radial inlet passages ( 42 ) to said combustion space ( 11 ), said radial inlet passages having a tangential component along its path;
a fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) provided in a respective inlet flow region of at least some of said inlet passages ( 42 ), said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) having a length and extending lengthwise through said respective inlet passage ( 42 ) in an axial direction (AR) of said burner and traverse to an oxidant flow direction (OR), and wherein each fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) comprises a wall having at least one fuel output opening ( 44 , 45 ) radial to said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) for mixing fuel (BS) into said respective inlet passage ( 42 ) with a directional component extending transverse to the oxidant flow direction (OR).
12 . The burner according to claim 11 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 d ) is arranged in said respective inlet passage ( 42 ).
13 . The burner according to claim 11 , wherein at least one of said fuel supply pipes ( 43 c ) is arranged directly in front of said respective inlet passage ( 42 ) in the oxidant flow direction (OR).
14 . The burner according to claim 11 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c ) is arranged centrally in said respective inlet passage ( 42 ) with respect to a center longitudinal axis (L) of said respective inlet passage ( 42 ).
15 . The burner according to claim 11 , wherein at least one of said fuel supply pipes ( 43 d ) is arranged off-center in said respective inlet passage ( 42 ) with respect to a center longitudinal axis (L) of said respective inlet passage ( 42 ).
16 . The burner according to claim 11 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) comprises a plurality of fuel output openings ( 44 , 45 ) arranged at a distance from one another along said length of said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ).
17 . The burner according to claim 11 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) comprises two fuel output openings ( 44 , 45 ) arranged at the same position with respect to said length of said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) for delivering fuel (BS) from said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) via said two fuel output openings ( 44 , 45 ) with two directional components opposed to one another.
18 . The burner according to claim 17 , wherein said at least one fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) comprises a cross section and wherein, with respect to said cross section of said fuel supply pipe, said two fuel output openings ( 44 , 45 ) are located diametrically opposite one another.
19 . The burner according to claim 17 , wherein said at least one fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) comprises a cross section and said two fuel output openings each having a center longitudinal axis and wherein, with respect to said cross section of said fuel supply pipe, said respective center longitudinal axes (L 1 , L 2 ) of said two fuel output openings ( 44 , 45 ) enclose an obtuse angle (α) with one another.
20 . The burner according to claim 11 , wherein said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) each have one of a cylindrical cross section and an airfoil-shaped cross section.
21 . The burner according to claim 11 , wherein said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) are each detachably mounted so that each fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) formed in accordance with a first predetermined fuel mixing configuration can be individually exchanged for a fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) based on another predetermined fuel mixing configuration.
22 . The burner according to claim 12 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c ) is arranged centrally in said respective inlet passage ( 42 ) with respect to a center longitudinal axis (L) of said respective inlet passage ( 42 ).
23 . The burner according to claim 13 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c ) is arranged centrally in said respective inlet passage ( 42 ) with respect to a center longitudinal axis (L) of said respective inlet passage ( 42 ).
24 . The burner according to claim 12 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) comprises a plurality of fuel output openings ( 44 , 45 ) arranged at a distance from one another along said length of said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ).
25 . The burner according to claim 13 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) comprises a plurality of fuel output openings ( 44 , 45 ) arranged at a distance from one another along said length of said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ).
26 . The burner according to claim 14 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) comprises a plurality of fuel output openings ( 44 , 45 ) arranged at a distance from one another along said length of said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ).
27 . The burner according to claim 12 , wherein at least one of said fuel supply pipes ( 43 d ) is arranged off-center in said respective inlet passage ( 42 ) with respect to a center longitudinal axis (L) of said respective inlet passage ( 42 ).
28 . The burner according to claim 13 , wherein at least one of said fuel supply pipes ( 43 d ) is arranged off-center in said respective inlet passage ( 42 ) with respect to a center longitudinal axis (L) of said respective inlet passage ( 42 ).
29 . The burner according to claim 12 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) comprises two fuel output openings ( 44 , 45 ) arranged at the same position with respect to said length of said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) for delivering fuel (BS) from said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) via said two fuel output openings ( 44 , 45 ) with two directional components opposed to one another.
30 . The burner according to claim 13 , wherein at least one of said fuel supply pipes ( 43 a , 43 b , 43 c , 43 d ) comprises two fuel output openings ( 44 , 45 ) arranged at the same position with respect to said length of said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) for delivering fuel (BS) from said fuel supply pipe ( 43 a , 43 b , 43 c , 43 d ) via said two fuel output openings ( 44 , 45 ) with two directional components opposed to one another.