Burner for operating a heat generator
First Claim
1. A burner for operating a heat generator, the burner comprising:
- a swirl generator for a combustion-air flow and means for injecting at least one fuel into the combustion-air flow,a mixing section arranged downstream of the swirl generator and having, inside a first part of the section in a downstream direction of flow, a number of transition passages for passing a flow formed in the swirl generator into a mixing tube arranged downstream of the transition passages, wherein at an end of the mixing tube, in a region leading out to a downstream combustion space, a wall of the mixing tube is formed by a first arc having a first radius R1 which runs convexly relative to an axial burner axis, wherein the first arc merges into a second arc having a second radius R2, the second arc further forming the mixing tube wall and extends to an outlet plane of the mixing tube and runs concavely relative to the axial burner axis, andwherein the first arc forms a first sectorial angle β
1 and the second arc forms a second sectorial angle β
2, the angles β
1 and β
2 being complementary angles such that a covered sector β
1 +β
2 of the two arcs is <
90°
.
2 Assignments
0 Petitions
Accused Products
Abstract
A burner for operating a combustion chamber, which burner essentially comprises a swirl generator (100), a transition piece (200) arranged downstream of the swirl generator, and a mixing tube (20), transition piece (200) and mixing tube (20) forming the mixing section of the burner and being arranged upstream of a combustion space (30). At the end of the mixing tube (20) in its region leading out to a downstream combustion space (30), the mixing tube (20) has a first radius (R1) which runs convexly relative to the burner axis (60). This radius (R1) merges into a second radius (R2) which extends up to the outlet plane (70) of the mixing tube (20) and runs concavely relative to the burner axis (60), the covered sector (β1 +β2) of the two radii (R1, R2) being 90° at most. With this configuration, enlargement and stabilization of the backflow zone (50) as well as axial orientation of the marginal flow are achieved.
15 Citations
16 Claims
-
1. A burner for operating a heat generator, the burner comprising:
-
a swirl generator for a combustion-air flow and means for injecting at least one fuel into the combustion-air flow, a mixing section arranged downstream of the swirl generator and having, inside a first part of the section in a downstream direction of flow, a number of transition passages for passing a flow formed in the swirl generator into a mixing tube arranged downstream of the transition passages, wherein at an end of the mixing tube, in a region leading out to a downstream combustion space, a wall of the mixing tube is formed by a first arc having a first radius R1 which runs convexly relative to an axial burner axis, wherein the first arc merges into a second arc having a second radius R2, the second arc further forming the mixing tube wall and extends to an outlet plane of the mixing tube and runs concavely relative to the axial burner axis, and wherein the first arc forms a first sectorial angle β
1 and the second arc forms a second sectorial angle β
2, the angles β
1 and β
2 being complementary angles such that a covered sector β
1 +β
2 of the two arcs is <
90°
. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification