Corrugated annular dilution tank for reducing emissions

Abstract

A combustor bushing for a gas turbine combustor includes an outer bushing having multiple outer bushing segments and an inner bushing having multiple inner bushing segments. Each segment of the inner and outer bushings includes at least one slotted dilution opening extending in a circumferential direction, each slotted dilution opening including a guide wall extending radially from the respective bushing into a dilution zone in the combustion chamber between the outer and inner bushings. At least one slotted dilution opening may be a curved slotted (concave or convex) dilution opening, and the curved slotted dilution openings for each segment of the outer and inner bushings may be connected to provide a wavy slotted dilution opening extending annularly through the outer and inner bushings.

Description

Technical Field

[0001] This disclosure relates to the dilution of combustion gases in the combustion chamber of a gas turbine engine. Background Technology

[0002] In conventional gas turbine engines, it is known to provide a dilution airflow to a combustion chamber downstream of the main combustion zone. Conventionally, an annular combustor bushing may include an inner bushing and an outer bushing, forming the combustion chamber between them. The inner and outer bushings may include dilution orifices through the inner bushing, which provide an airflow (i.e., a dilution jet) from a passage surrounding the annular combustor bushing into the combustion chamber. Some applications are known to use circular orifices to provide a dilution airflow to the combustion chamber. The airflow through the circular dilution orifices in a conventional combustor mixes with the combustion gases within the combustion chamber to provide quenching of the combustion gases. The high-temperature region seen behind the dilution jet (i.e., the wake region of the dilution jet) is associated with high NOx formation. Furthermore, the circular dilution air jet does not diffuse laterally, thus generating high temperatures between the dilution jets, which also contributes to high NOx formation. Attached Figure Description

[0003] The features and advantages of this disclosure will be apparent from the following description of various exemplary embodiments, as shown in the accompanying drawings, wherein the same reference numerals generally denote the same, functionally similar and / or structurally similar elements.

[0004] Figure 1 This is a schematic partial cross-sectional side view of an exemplary high-bypass turbofan jet engine according to an embodiment of the present disclosure.

[0005] Figure 2 This is a cross-sectional side view of an exemplary combustion section according to an embodiment of the present disclosure.

[0006] Figure 3 The embodiments of the present disclosure are depicted in Figure 1 A partial cross-sectional view of the burner bushing taken at plane 3-3.

[0007] Figure 4 A partial cross-sectional side view of an exemplary burner bushing according to one aspect of this disclosure is depicted.

[0008] Figure 5 A top perspective view of an exemplary burner bushing according to one aspect of this disclosure is depicted.

[0009] Figure 6 A plan view of the first section of the outer bushing according to one aspect of this disclosure is depicted.

[0010] Figure 7 Depicting another aspect of this disclosure Figure 6A partial cross-sectional side view of the curved dilution opening taken at plane 7-7.

[0011] Figure 8 A plan view of the first section of the outer bushing according to another aspect of this disclosure is depicted.

[0012] Figure 9 A plan view of the first section of the outer bushing according to another aspect of this disclosure is depicted.

[0013] Figure 10 A plan view of the first section of the outer bushing according to another aspect of this disclosure is depicted.

[0014] Figure 6 A plan view of the first section of the outer bushing according to one aspect of this disclosure is depicted.

[0015] Figure 11 A plan view of the first section of the outer bushing according to another aspect of this disclosure is depicted.

[0016] Figure 12 A plan view depicting the connection between the first and second outer bushings according to one aspect of this disclosure is provided.

[0017] Figure 13 A plan view depicting the connection between the first and second outer bushings according to another aspect of this disclosure is provided.

[0018] Figure 14 A plan view depicting the connection between the first and second outer bushings according to another aspect of this disclosure is provided.

[0019] Figure 15 A plan view depicting the connection between the first and second outer bushings according to another aspect of this disclosure is provided. Detailed Implementation

[0020] Various embodiments are discussed in detail below. Although specific embodiments are discussed, this is for illustrative purposes only. Those skilled in the art will recognize that other components and constructions can be used without departing from the spirit and scope of this disclosure.

[0021] As used herein, the terms “first,” “second,” and “third” are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of the components.

[0022] The terms "upstream" and "downstream" refer to the relative directions of fluid flow within a fluid path. For example, "upstream" refers to the direction from which the fluid flows, and "downstream" refers to the direction in which the fluid flows.

[0023] Various embodiments are discussed in detail below. Although specific embodiments are discussed, this is for illustrative purposes only. Those skilled in the art will recognize that other components and constructions can be used without departing from the spirit and scope of this disclosure.

[0024] In the combustion section of a turbine engine, air flows through an outer passage surrounding the burner liner and through an inner passage surrounding the burner liner. Air typically flows from the upstream end to the downstream end of the burner liner. Some of the airflow in the outer and inner passages is diverted through dilution orifices in the burner liner and enters the combustion chamber as dilution air. One purpose of the dilution airflow is to cool (i.e., quench) the combustion gases before they enter the turbine section. However, the combustion products from the main combustion zone must be quenched quickly and effectively to minimize the high-temperature region, thereby reducing NOx emissions from the combustion system.

[0025] This disclosure aims to reduce NOx emissions by improving the dilution and quenching of hot combustion gases from the main combustion zone. According to this disclosure, the burner bushing includes at least one curved or wavy dilution opening having a guide wall extending downstream of the dilution opening into the combustion chamber. The curved or wavy dilution opening may extend circumferentially through the bushing around its entire circumference, or may include curved or wavy sections extending through various bushing segments, wherein the bushing segments together form an annular type bushing. The curved or wavy dilution opening introduces dilute air into the combustion chamber at different axial locations around the bushing circumference to improve mixing in regions with closer stoichiometric ratios.

[0026] Now refer to the attached diagram, Figure 1 This is a schematic partial cross-sectional side view of an exemplary high-bypass turbofan jet engine 10, referred to herein as "engine 10," which can be incorporated into various embodiments of this disclosure. Although further described below with reference to turbofan engines, the invention is also applicable to general turbomachinery, including turbojet engines, turboprop engines, and turboshaft gas turbine engines, including marine and industrial turbine engines and auxiliary power units. Figure 1 As shown, engine 10 has a longitudinal or axial centerline axis 12 that extends from upstream end 98 to downstream end 99 for reference. Typically, engine 10 may include a fan assembly 14 and a core engine 16 disposed downstream of the fan assembly 14.

[0027] The core engine 16 typically includes a housing 18 defining an annular inlet 20. The housing 18 surrounds or at least partially forms a compressor section, a combustion section 26, a turbine section, and an injection / exhaust nozzle section 32 in a series flow relationship. The compressor section includes a boost or low-pressure (LP) compressor 22 and a high-pressure (HP) compressor 24. The turbine section includes a high-pressure (HP) turbine 28 and a low-pressure (LP) turbine 30. A high-pressure (HP) rotor shaft 34 drivesly connects the HP turbine 28 to the HP compressor 24. A low-pressure (LP) rotor shaft 36 drivesly connects the LP turbine 30 to the LP compressor 22. The LP rotor shaft 36 may also be connected to a fan shaft 38 of the fan assembly 14. In certain embodiments, such as Figure 1 As shown, the LP rotor shaft 36 can be connected to the fan shaft 38 via a reduction gear 40, for example in an indirect drive configuration or a gear drive configuration. In other embodiments, although not shown, the engine 10 may also include an intermediate pressure (IP) compressor and a turbine that rotates with the intermediate pressure shaft.

[0028] like Figure 1 As shown, the fan assembly 14 includes a plurality of fan blades 42 coupled to and extending radially outward from the fan shaft 38. An annular fan housing or nacelle 44 circumferentially surrounds at least a portion of the fan assembly 14 and / or the core engine 16. In one embodiment, the nacelle 44 may be supported relative to the core engine 16 by a plurality of circumferentially spaced outlet guide vanes or struts 46. Furthermore, at least a portion of the nacelle 44 may extend externally to the core engine 16 to define a bypass airflow passage 48 therebetween.

[0029] Figure 2 Is it like this? Figure 1 A cross-sectional side view of an exemplary combustion section 26 of the core engine 16 shown. Figure 2 As shown, combustion section 26 typically includes a combustor bushing 50 having an inner bushing 52, an outer bushing 54, a cowling 60, and a dome assembly 56. The inner bushing 52, outer bushing 54, and dome assembly 56 together define a combustion chamber 62. Combustion chamber 62 may more specifically define various regions, including a main combustion zone where initial chemical reactions of the fuel-oxidant mixture can occur and / or recirculation of the combustion gases 86 can occur further downstream to a dilution zone 72, where mixing and / or recirculation of the combustion gases 86 and air can occur before flowing into the HP turbine 28 and LP turbine 30. The dome assembly 56 extends radially between the outer bushing 54 and the inner bushing 52.

[0030] like Figure 2As shown, the inner bushing 52 can be enclosed within the inner housing 65 and the outer bushing 54 can be enclosed within the outer housing 64. An outer flow passage 88 is defined between the outer housing 64 and the outer bushing 54, and an inner flow passage 90 is defined between the inner housing 65 and the inner bushing 52. The inner bushing 52 may include a plurality of curved slot dilution openings 150 (described in more detail below), and the outer bushing 54 may also include a plurality of curved slot dilution openings 150. As will be described in more detail below, the curved slot dilution openings 150 allow a compressed air flow 82(c) to pass through and enter the dilution zone 72 of the combustion chamber 62. The compressed air flow 82(c) can thus be used to provide quenching of the combustion gases 86 in the dilution zone 72, thereby cooling the combustion gas flow 86 entering the turbine section.

[0031] During engine 10 operation, such as Figure 1 and Figure 2 As shown, as indicated by the arrows, a volume of air 73 enters the engine 10 from the upstream end 98 through the relevant inlet 76 of the nacelle 44 and / or fan assembly 14. As the volume of air 73 passes through the fan blades 42, a portion of the air, as indicated by arrow 78, is directed or guided into the bypass airflow passage 48, while another portion of the air 80, as indicated by the arrows, is directed or guided into the LP compressor 22. The air 80 is gradually compressed as it flows through the LP compressor 22 and the HP compressor 24 towards the combustion chamber 26. (Reference) Figure 2 Now, compressed air 82, as schematically indicated by the arrow, flows into the diffuser cavity 84 of the combustion section 26 and pressurizes the diffuser cavity 84. A first portion of the compressed air 82, as schematically indicated by the arrow, flows from the diffuser cavity 84 into the pressure chamber 66, where it is swirled and mixed with fuel supplied by the fuel nozzle assembly 70 via the swirler assembly 58 to produce a swirling fuel-air mixture 85, which is then ignited and burned to produce combustion gases 86. A second portion of the compressed air 82, compressed air 82(b), as schematically indicated by the arrow, can be used for various purposes other than combustion. For example, as... Figure 2As shown, compressed air 82(b) can be directed into the outer flow passage 88 and the inner flow passage 90. A portion of the compressed air 82(b) can then pass through the curved slot dilution opening 150 (schematically shown as compressed air 82(c)) and enter the dilution zone 72 of the combustion chamber 62 to provide quenching of the combustion gases 86 in the dilution zone 72. The compressed air 82(c) can also provide turbulence to the flow of the combustion gases 86, thereby improving the mixing of the compressed air 82(c) with the combustion gases 86. A similar flow occurs from the inner flow passage 90 through the curved slot dilution opening 150 of the inner liner 52. Furthermore, or alternatively, at least a portion of the compressed air 82(b) can be directed away from the diffuser cavity 84. For example, a portion of the compressed air 82(b) can be directed through various flow passages (not shown) to provide cooling air to at least one of the HP turbine 28 or the LP turbine 30.

[0032] For reference again Figure 1 and Figure 2 Combustion gases 86 generated in combustion chamber 62 flow from combustion section 26 through turbine inlet 68 into HP turbine 28, causing HP rotor shaft 34 to rotate, thereby supporting the operation of HP compressor 24. Figure 1 As shown, the combustion gases 86 are then directed through the LP turbine 30, causing the LP rotor shaft 36 to rotate, thereby supporting the operation of the LP compressor 22 and / or the rotation of the fan shaft 38. The combustion gases 86 are then discharged through the injection exhaust nozzle section 32 of the core engine 16 to provide propulsion at the downstream end 99.

[0033] Figure 3 Is Figure 1 The image shows a partial cross-sectional view of the burner bushing 50 taken at plane 3-3. (See image.) Figure 3As seen, the burner bushing 50 is a generally annular bushing that extends circumferentially around the centerline axis 12 of the engine 10. Since it may involve the burner bushing 50, the centerline axis 12 may also correspond to the burner centerline 112. The burner bushing 50 includes an outer bushing 54 and an inner bushing 52. Representative swirler assemblies 58 are shown circumferentially spaced around the burner centerline 112. With respect to each swirler assembly 58, a portion of the burner bushing 50 can be considered a segment of the burner bushing 50. That is, the burner bushing 50 can be considered to include multiple segments circumferentially comprising around the burner centerline 112 (e.g., a first burner bushing segment 129 and a second burner bushing segment 131), where each segment corresponds to a respective swirler assembly 58. For example, a first burner bushing section 129 may be associated with a first cyclone assembly 58(a) and may be defined between section boundary lines 134 and 136, which extend radially outward from the burner centerline 112 and are angularly spaced from the center 144 of the first cyclone assembly 58(a). Similarly, a second burner bushing section 131 may be associated with a second cyclone assembly 58(b) and may be defined between section boundary lines 134 and 138. The second burner bushing section 131 is adjacent to the first burner bushing section 129. The first burner bushing section 129 includes a first outer bushing 130 and a first inner bushing section 140, while the second burner bushing section 131 includes a second outer bushing 132 and a second inner bushing section 142. Of course, both the outer bushing 54 and the inner bushing 52 can be formed as a continuous annular bushing, rather than multiple segments connected together. However, for the purposes of the following discussion on dilution openings, both the outer bushing 54 and the inner bushing 52 will be considered as segmented.

[0034] Figure 4 A partial cross-sectional view of a portion of a burner bushing 50 according to one aspect of this disclosure is depicted. Figure 5 yes Figure 4 A perspective view of a segment of the burner bushing 50 shown. Figure 4 and 5 The segment of burner bushing 50 shown may correspond, for example, to the first burner bushing segment 129. Figure 4 and 5 In this image, the first hydrocyclone assembly 58(a) is depicted for reference only. (Reference) Figure 4 The burner bushing 50 defines an axial direction (L) parallel to the burner centerline 112, a radial direction (R) substantially perpendicular to the burner centerline 112, and a circumferential direction (C) around the burner centerline 112. The burner bushing 50 includes an outer bushing 54, which, as described above, comprises a plurality of interconnected outer bushing segments (e.g., a first outer bushing segment 130 and a second outer bushing segment 132). Figure 3 The first outer bushing 130 extends from the upstream end 100 of the outer bushing to the downstream end 102 of the outer bushing and includes an outer bushing dilution zone 108 between the upstream end 100 and the downstream end 102 of the outer bushing. The first outer bushing 130 has a cold surface side 122 adjacent to the outer flow passage 88 and a hot surface side 124 adjacent to the combustion chamber 62. As described above, a portion of the compressed air 82(b) flows in the outer flow passage 88, and the compressed air 82(b) flows from the upstream end 100 to the downstream end 102 of the outer bushing, thereby defining an outer flow direction 92 extending in the axial direction (L). The first outer bushing 130 further includes at least one first outer bushing slotted dilution opening 114 passing through the outer bushing dilution zone 108. Various arrangements of the first outer bushing slotted dilution opening 114 will be described in more detail below. However, in Figure 4 and Figure 5 In the middle, the first section of the outer bushing slotted dilution opening 114 is shown as a curved slot opening ( Figure 5 This will be described in more detail below. It can also be seen that the first outer bushing 130 includes a first outer bushing guide wall 116 that extends radially inward from the outer bushing hot surface side 124 adjacent to the downstream side 146 of the first outer bushing slotted dilution opening 114. The first outer bushing guide wall 116 generally follows the contour of the downstream side 146 of the first outer bushing slotted dilution opening 114. Using the first outer bushing slotted dilution opening 114 and the first outer bushing guide wall 116, a portion of the compressed air 82b flowing in the outer flow channel (schematically shown as compressed air 82(c)) flows through the first outer bushing slotted dilution opening 114 and is radially guided or directed by the first outer bushing guide wall 116 into the dilution zone 72 of the combustion chamber 62. Although the term "guide wall" may be used herein, it should be noted that guide wall 116 acts as a barrier for the hot gas flowing within combustion chamber 62, and also as a guide or support wall for guiding compressed air 82(c) through the slotted dilution opening 114 of the first outer bushing into combustion chamber 62. Therefore, guide wall 116 need not merely guide the hot gas or air 82(c), but can act as a guide for their respective flows.

[0035] The burner bushing 50 also includes an inner bushing 52, which, as described above, comprises a plurality of inner bushing segments connected together (e.g., a first inner bushing segment 140 and a second inner bushing segment 142). Figure 3The first liner segment 140 extends from the upstream end 104 of the liner to the downstream end 106 of the liner, and includes a liner dilution zone 110 between the upstream end 104 and the downstream end 106 of the liner. The first liner segment 140 has a liner cold surface side 126 adjacent to the inner flow passage 90 and a liner hot surface side 128 adjacent to the combustion chamber 62. As described above, a portion of compressed air 82(b) flows in the inner flow passage 90 from the upstream end 104 to the downstream end 106 of the liner, thereby defining a liner flow direction 94 extending in the axial direction (L). The first liner segment 140 further includes at least one first liner slotted dilution opening 118 passing through the liner dilution zone 110. Various arrangements of the first liner slotted dilution opening 118 will be described in more detail below. However, in Figure 4 In the diagram, the first section of the inner liner slotted dilution opening 118 is shown as a curved slotted opening, which will be described in more detail below. It is also seen that the first inner liner section 140 includes a first section inner liner guide wall 120 extending radially outward from the inner liner hot surface side 128 adjacent to the downstream side 148 of the first section inner liner slotted dilution opening 118. (As...) Figure 5 As shown, the first section of the inner liner guide wall 120 generally follows the profile of the downstream side 148 of the first section of the inner liner slotted dilution opening 118. Various arrangements of the first section of the inner liner guide wall 120 will be described in more detail below. For example, in Figure 4 As seen, a portion of the compressed air 82(b) flowing in the inner flow channel 90 (schematically shown as compressed air 82(c)) flows through the first section inner liner slotted dilution opening 118 and the first section inner liner guide wall 120, and is radially guided or directed into the dilution zone 72 of the combustion chamber 62 by the first section inner liner guide wall 120.

[0036] Although the foregoing description refers to the first burner bushing section 129 of the burner bushing 50, it is understood that the same arrangement of the first burner bushing section 129 applies to the second burner bushing section 131 of the burner bushing 50, as well as all other sections of the burner bushing 50.

[0037] Now about Figures 6 to 15Various arrangements of the slotted dilution openings through the outer bushing 54 and the inner bushing 52 are described below. The slotted dilution openings through the outer bushing will be described below, particularly those through the first section of the outer bushing 130, and, where applicable, the second section of the outer bushing 132. However, it is understood that the same slotted dilution openings described below apply to all remaining outer bushing sections of the burner bushing 50. Furthermore, the same slotted dilution openings described below apply to the first inner bushing section 140, and, where applicable, to the second inner bushing section 142, as well as all other inner bushing sections. Therefore, for the sake of brevity, the descriptions of the remaining outer bushing sections and all inner bushing sections will be omitted.

[0038] Figure 6 Depicting in Figure 4 A plan view of the exemplary first segment of the outer bushing 130, taken at view AA. Figure 6 As shown, the first outer bushing 130 extends circumferentially between section boundary lines 134 and 136, and extends axially (L) from the upstream end 100 to the downstream end 102 of the outer bushing, including an outer bushing dilution region 108 therebetween. Within the outer bushing dilution region 108, a curved slot dilution opening 150 extends through the first outer bushing 130. The curved slot dilution opening 150 extends circumferentially (C) across the first outer bushing 130 from section boundary line 134 to section boundary line 136. However, the curved slot dilution opening 150 may not extend completely across the width 171 of the first outer bushing 130, but may partially extend across the width of the first outer bushing 130 to form the curved slot dilution opening 150. Figure 6 In the diagram, the curved slot dilution opening 150 is shown as a concave curved slot dilution opening 151 relative to the outer flow direction 92 or the inner flow direction 94. However, the curved slot dilution opening 150 may alternatively be formed as a convex curved slot dilution opening 156 relative to the outer flow direction 92 or the inner flow direction 94. The curved slot dilution opening 150 includes a guide wall 152, as seen by the dashed lines, which generally follows the curved profile of the downstream side 154 of the curved slot dilution opening 150. As seen by the dashed lines, a similar guide wall 158 may be provided to the convex curved slot dilution opening 156.

[0039] exist Figure 6As can be seen, the curved slot dilution opening 150 is generally arranged symmetrically about the centerline 170 of the first segment. For example, the first distance 196 from the upstream end 100 of the outer bushing of the first segment 130 to the first end 192 of the curved slot dilution opening 150 and to the second end 194 of the curved slot dilution opening 150 is the same. On the other hand, the curved slot dilution opening 198 can be arranged such that, relative to the first end 192 at the first distance 196, the second end 200, as seen by the dashed line, is at the second distance 202 downstream. Therefore, the curved slot dilution opening 198 can be skewed and not symmetrical about the centerline 170 of the first segment.

[0040] Figure 7 Is Figure 6 A partial cross-sectional view of the curved slit dilution opening 150 and the guide wall 152, taken at plane 7-7. Although Figure 6 and 7 The arrangement of the first outer bushing segment 130 is depicted, but it can be readily understood that a similar mirror arrangement can be implemented in the first inner bushing segment 140. Therefore, Figure 6 and 7 Description and Figures 8 to 14 The description may be implemented in either or both of the outer bushing 54 and / or the inner bushing 52. For example... Figure 7 As seen, the guide wall 152 extends radially inward from the outer bushing hot surface side 124 into the dilution zone 72 of the combustion chamber 62 from the downstream side 154 of the curved slot dilution opening 150. For the first inner bushing section 140, the guide wall 152 extends radially outward from the inner bushing hot surface side 128 into the dilution zone 72 of the combustion chamber 62. The height 160 of the guide wall 152 can be varied to obtain the desired mixing amount of compressed air 82(c) with the combustion gas 86 within the dilution zone 72. Figure 7 The guide wall 152 shown is generally perpendicular to the outer bushing hot surface side 124 and the inner bushing hot surface side 128, but the guide wall 152 may alternatively be inclined. For example, as seen by the dashed lines, the upstream inclined guide wall 162 may be inclined in the upstream direction at an upstream angle 164 towards the outer bushing upstream end 100 (or inner bushing upstream end 104) of the outer bushing 54 (or inner bushing 52). Alternatively, as seen by the dashed lines, the downstream inclined guide wall 166 may be inclined in the downstream direction at a downstream angle 168 towards the outer bushing downstream end 102 (or inner bushing downstream end 106) of the outer bushing 54 (or inner bushing 52). The upstream angle 164 of the outer / inner bushing guide wall may range from zero to fifty-five degrees in the upstream direction, while the downstream angle 168 may range from zero to forty-five degrees. Of course, the upstream angle 164 and the downstream angle 168 are not limited to the above ranges, but can be implemented at other angles based on the desired mixing amount of the dilution air.

[0041] Figure 7 The diagram also shows a bridging member 204 spanning the curved slotted dilution opening 150. That is, when the slotted dilution opening extends circumferentially across the first segment from segment boundary line 134 to segment boundary line 136, and when the slotted dilution opening of each segment of the outer bushing 54 connects with the slotted dilution opening of the adjacent segment, the outer bushing 54 can be axially divided into two segments: an upstream segment 206 and a downstream segment 208. The bridging member 204 is implemented to connect the two segments. For example, consider each outer bushing segment including... Figure 6 The case of the curved slot dilution opening 150. In this case, the second end 194 of the curved slot dilution opening 150 in the first burner bushing section 129 is aligned and connected to the second end 194 of the curved slot dilution opening 150 in the second burner bushing section 131, and so on, for each section around the entire circumference of the outer bushing 54. The connection of the curved slot dilution opening 150 of each section causes the outer bushing to separate into an upstream section 206 and a downstream section 208. Therefore, in order to connect the upstream section 206 and the downstream section 208 of the outer bushing together, a plurality of bridging members 204 may be included around the circumference of the outer bushing 54. For example, with respect to the first burner bushing section 129 and the second burner bushing section 131, the bridging members 204 may be provided across the curved slot dilution opening 150 at the intersection of the two sections (i.e., at the section boundary line 134).

[0042] Figure 8 It is based on another aspect of this disclosure. Figure 4 Another plan view of the first segment of the outer bushing 130, taken at point AA. Figure 8 In the middle, the first outer bushing 130 defines the first segment centerline 170, which is centered between the segment boundary line 134 and the segment boundary line 136. Figure 8 The arrangement of the first segment of the slotted dilution openings includes multiple curved slotted dilution openings connected together in the same segment. More specifically, Figure 8The slotted dilution opening includes a first curved slot dilution opening 172 connected to the second curved slot dilution opening 174, extending circumferentially (C) across the first segment outer bushing 130 from segment boundary line 134 to segment boundary line 136. The first curved slot dilution opening 172 is a concave curved slot dilution opening, similar to the concave curved slot dilution opening 150, but extending from segment boundary line 134 to the first segment centerline 170. Similarly, the second curved slot dilution opening 174 is similar to the concave curved slot dilution opening 150, but extending from the first segment centerline 170 to the segment boundary line 136. The first curved slot dilution opening 172 and the second curved slot dilution opening 174 are connected at the first segment centerline 170. The guide wall 176 generally follows the contours of the downstream side 178 of the first curved slot dilution opening 172 and the downstream side 180 of the second curved slot dilution opening 174. It is understandable that although the first curved slot dilution opening 172 and the second curved slot dilution opening 174 are shown as concave curved slot dilution openings relative to the outward flow direction 92, they can both be convex curved slot dilution openings, similar to Figure 6 The convex, curved, narrow slot dilution opening 156. Or, as... Figure 9 As shown, the first convex curved slot dilution opening 182 can be implemented in conjunction with the second concave curved slot dilution opening 184 within the first outer bushing 130. The guide wall 186 follows the contours of the downstream side 188 of the first convex curved slot dilution opening 182 and the downstream side 190 of the second concave curved slot dilution opening 184.

[0043] In the foregoing aspects, the slotted dilution opening is described as a curved slotted dilution opening. However, the slotted dilution opening can alternatively be formed by linear slot segments arranged in the circumferential direction. Figure 10 An example of a first-segment outer bushing 130, including a linear slot segment, is depicted. Figure 10As can be seen, the linear slot dilution opening 230 includes a linear slot dilution opening intermediate section 210, a first linear slot dilution opening outer section 212, and a second linear slot dilution opening outer section 214. The linear slot dilution opening intermediate section 210 typically extends circumferentially across the intermediate section 224 of the first outer liner 130. The first linear slot dilution opening outer section 212 extends from the intermediate section 224 across the first outer section 226 of the first outer liner 130 to the section boundary line 136 of the first outer liner 130, and can extend circumferentially and axially upward and downstream at an angle 218. The second linear slot dilution opening outer section 214 extends from the intermediate section 224 across the second outer section 228 of the first outer liner 130 to the section boundary line 134 of the first outer liner 130, and can extend circumferentially and axially upward and upstream at an angle 220. Alternatively, a second linear slot dilution opening outer segment 216 may be provided, which may extend from the middle segment 224 across the second outer segment 228 of the first outer sleeve 130 to the segment boundary line 136 of the first outer sleeve 130, and may extend circumferentially and axially upward and downstream at an angle 222.

[0044] Although the linear slot dilution opening 230 is in Figure 10 As shown in the diagram, the linear slotted dilution opening extends circumferentially from segment boundary line 134 to segment boundary line 136 across the entire first segment outer bushing 130. The linear slotted dilution opening does not need to extend circumferentially across the entire first segment outer bushing 130. Instead, the linear slotted dilution opening may, for example, only include the intermediate segment 210 of the linear slotted dilution opening. In this respect, the intermediate segment 210 of the linear slotted dilution opening can take other forms than simply a circumferentially extending straight line. For example, the intermediate segment 210 of the linear slotted dilution opening can alternatively form a V-shaped slotted dilution opening 232, as shown by the dashed line, with the apex 234 of the V-shaped slotted dilution opening 232 located on the upstream side of the V-shaped slotted dilution opening 232. Of course, the V-shaped slotted dilution opening 232 can be combined with... Figure 10 The opposite of what is shown.

[0045] Figures 4 to 10 Each of the above arrangements of the slotted dilution openings in the burner typically results in a circumferentially continuous slotted dilution opening through the outer bushing 54. That is, the slotted dilution opening extends circumferentially around the burner centerline 112 through the outer bushing 54, thereby causing the upstream section 206 and the downstream section 208 of the outer bushing to be connected to circumferentially spaced bridging members 204. In contrast, the following description will present an aspect of the disclosure in which the slotted dilution openings are not circumferentially continuous but segment-based. In other words, the slotted dilution opening of one segment does not connect to the slotted dilution opening of an adjacent burner bushing segment.

[0046] Figure 11 An exemplary first-segment outer bushing according to another aspect of this disclosure is depicted. Figure 11 In this configuration, multiple rows of slotted dilution openings are provided via a first outer bushing 130. The first row 236 includes a plurality of first-row curved slotted dilution openings 240, 242, and 244, and a second row 238 downstream of the first row 236 includes a plurality of second-row curved slotted dilution openings 246 and 248. Each of the first-row curved slotted dilution openings 240, 242, and 244 is shown as a concave curved slotted dilution opening relative to the outward flow direction 92. Each of the second-row curved slotted dilution openings 246 and 248 is also shown as a concave curved slotted dilution opening relative to the outward flow direction 92. Of course, the first-row curved slotted dilution openings 240, 242, and 244 can be convex curved slotted dilution openings instead of concave ones, and the second-row curved slotted dilution openings 246 and 248 can be concave curved slotted dilution openings. Alternatively, as... Figure 11 As shown, the first row of curved slot dilution openings 240, 242, and 244 can be concave curved slot dilution openings, while the second row 238 can include a second row of curved slot dilution openings 250 and 252 (shown in dashed lines) implemented as convex curved slot dilution openings. Although not shown in Figure 11 As shown, each of the first row of curved slot dilution openings 240, 242 and 244 may include a corresponding guide wall extending into the combustion chamber 62 on its downstream side, and each of the second row of curved slot dilution openings 250 and 252 may also include a corresponding guide wall extending into the combustion chamber on its respective downstream side.

[0047] In addition, such as Figure 11 As shown, the first row of curved slot dilution openings 240, 242, and 244 can be spaced apart from each other in the circumferential direction, and the second row of curved slot dilution openings 250 and 252 can also be spaced apart from each other in the circumferential direction. For example, the first row of curved slot dilution openings 240 can be implemented in the intermediate section 254 of the first outer bushing 130, the first row of curved slot dilution openings 242 can be implemented in the first outer section 258 disposed between the intermediate section 254 and the section boundary line 134, and the first row of curved slot dilution openings 244 can be implemented in the second outer section 256 between the intermediate section 254 and the section boundary line 136. For example, the spacing distance 260 between the first row of curved slot dilution openings 240 and the first row of curved slot dilution openings 244 can be set based on the desired amount of dilution air flow provided from the outer flow passage 88 to the dilution zone 72 of the combustion chamber 62.

[0048] Furthermore, each curved slot dilution opening in the second row can be circumferentially offset (or staggered) relative to the curved slot dilution openings in the first row. For example, as Figure 11As shown, the second row of curved slot dilution openings 246 can be arranged to extend from the middle section 254 into the second outer section 256, such that the first end 262 of the second row of curved slot dilution openings 246 circumferentially overlaps with the first row of curved slot dilution openings 244, and the second end 264 of the second row of curved slot dilution openings 246 circumferentially overlaps with the first row of curved slot dilution openings 240.

[0049] As in Figure 12 What is seen is the arrangement of slotted dilution openings between segments of the outer bushing according to another aspect of this disclosure. Figure 12 In the first outer bushing 130, a concave curved slot dilution opening 265 is included, and a concave curved slot dilution opening 267 is included in the second outer bushing 132. Unlike... Figure 6 The concave curved slot dilution opening 150 (which spans the entire first section outer bushing 130 and extends circumferentially from section boundary line 134 to section boundary line 136) Figure 11 The concave curved slot dilution opening 265 does not extend the full distance between segment boundary lines 134 and 136. Instead, a first gap 272 is defined between the first end 268 of the concave curved slot dilution opening 265 and segment boundary line 136. Similarly, a second gap 274 is defined between the second end 270 of the concave curved slot dilution opening 265 and segment boundary line 134. Figure 12 In this implementation, to achieve a circumferentially continuous slotted dilution opening around the outer bushing 54, an outer bushing connecting dilution opening 266 is provided to connect the concave curved slotted dilution opening 265 of the first section of the outer bushing 130 to the concave curved slotted dilution opening 267 of the second section of the outer bushing 132. The outer bushing connecting dilution opening 266... Figure 12 The image shows a generally linear slotted dilution opening extending in the circumferential direction. Similar to the foregoing aspects, both the concave curved slotted dilution opening 265 and 267 include guide walls (not shown) along their respective downstream profiles. The outer bushing-connected dilution opening 266 may also include a guide wall (not shown), or the guide wall may be omitted from the outer bushing-connected dilution opening 266. Of course, the concave curved slotted dilution opening 265 and 267 can also be replaced with convex curved slotted dilution openings (not shown), or one may be concave, such as... Figure 11 As shown, one can be convex (not shown).

[0050] Figure 13 Another arrangement of slotted dilution openings between segments of the outer bushing, according to yet another aspect of this disclosure, is depicted. Figure 13 The layout is somewhat similar to Figure 12 The arrangement, but in Figure 13In this configuration, a convex curved slot connection dilution opening 276 is implemented between the first outer bushing 130 and the second outer bushing 132. For Figure 13 The arrangement allows the radius of the concave curved slot dilution opening 265 to be smaller than... Figure 12 The radius of the concave curved slot dilution opening 265. Therefore, the first gap 272 between the segment boundary line 136 and the first end 268 of the concave curved slot dilution opening 265 can be greater than the radius of the concave curved slot dilution opening 265. Figure 12 The gap, and the second gap 274 between the segment boundary line 134 and the second end 270 of the concave curved slot dilution opening 265 can be greater than Figure 12 The gap. By implementing a convex curved slot connecting the dilution opening 276, a sinusoidal continuous dilution opening through the outer bushing 54 can be formed around its entire circumference. Similarly, although not in Figure 13 As shown, but each corresponding curved slot dilution opening may include a corresponding guide wall with a profile along its respective downstream side.

[0051] Figure 14 Another arrangement of slotted dilution openings between segments of the outer bushing, according to yet another aspect of this disclosure, is depicted. Figure 14 In this configuration, the arrangement of slotted dilution openings is implemented to provide a one-piece outer bushing (i.e., without the need for bridging members 204 to connect the upstream and downstream sections of the outer bushing), which is consistent with... Figure 12 and 13 The aspects differ (where the slotted dilution opening is a continuous circumferential slotted opening around the entire circumference of the outer bushing 54). In Figure 14 In this process, the first segment of the outer bushing 130 may include a generally S-shaped slotted dilution opening 278, wherein a first end 282 of the S-shaped slotted dilution opening 278 may begin at the segment boundary line 134, and a second end 284 of the S-shaped slotted dilution opening 278 may extend across the segment boundary line 136 into a third segment 290 adjacent to the first segment of the outer bushing 130. Figure 3 In the third segment of the outer bushing 292. Similarly, the second segment of the outer bushing 132 includes an S-shaped slotted dilution opening 280, wherein a first end 286 of the S-shaped slotted dilution opening 280 begins at the segment boundary line 138, and a second end 288 extends across the segment boundary line 134 into the first segment of the outer bushing 130. If the first segment of the outer bushing 130 causes the S-shaped slotted dilution opening 278 and the S-shaped slotted dilution opening 280 to be offset, the second end 288 of the S-shaped slotted dilution opening 280 may be located upstream of the first end 282 of the S-shaped slotted dilution opening 278.

[0052] Figure 15 Another arrangement of slotted dilution openings between segments of the outer bushing, according to yet another aspect of this disclosure, is depicted. Similar to... Figure 14 The arrangement Figure 15The arrangement depicts another example of discontinuous slotted dilution openings between segments to provide a one-piece outer bushing 54. Figure 15 In the diagram, the first outer bushing 130 includes a first convex curved slot dilution opening 294, and the second outer bushing 132 includes a second convex curved slot dilution opening 296. The first convex curved slot dilution opening 294 may be centrally located between segment boundary lines 134 and 136. For example, a first gap 272 between segment boundary line 136 and a first end 308 of the first convex curved slot dilution opening 294 may be the same as a second gap 274 between segment boundary line 134 and a second end 310 of the first convex curved slot dilution opening 294. A similar alignment is provided for the second convex curved slot dilution opening 296 relative to segment boundary lines 134 and 138. Circumferentially, the first convex curved slot dilution opening 294 and the second convex curved slot dilution opening 296 are arranged in the first row 300.

[0053] A concave curved slot connection dilution opening 298 is provided between the first outer bushing 130 and the second outer bushing 132. (Example) Figure 15 As seen, the outer bushing concave curved slot connecting dilution opening 298 is disposed in the second row 302 and includes a first portion 297 disposed in the first burner bushing section 129 and a second portion 299 disposed in the second burner bushing section 131. The second row 302 also includes an outer bushing concave curved slot connecting dilution opening 312, which connects the first section of outer bushing 130 to the adjacent third section of outer bushing 292. The second row 302 also includes an outer bushing concave curved slot connecting dilution opening 314, which connects the second section of outer bushing 132 to the adjacent fourth section of outer bushing 316 (see...). Figure 3 ).like Figure 15 As shown, a first convex curved slot dilution opening 294 and a second convex curved slot dilution opening 296 are provided in the first row 300, and an outer bushing concave curved slot connecting dilution opening 298 is provided in the second row 302. The dilution openings of the first row 300 and the dilution openings of the second row 302 overlap each other circumferentially and axially. For example, the first convex curved slot dilution opening 294 and the outer bushing concave curved slot connecting dilution opening 298 overlap each other axially in the axial overlap region 304, and they also overlap each other circumferentially in the circumferential overlap region 306. A similar axial and circumferential overlap is provided between the second convex curved slot dilution opening 296 and the outer bushing concave curved slot connecting dilution opening 298. Although in Figure 15 Not shown, but a corresponding flow guide wall can be provided for each dilution opening. Alternatively, a flow guide wall can be provided for the dilution openings in the second row 302, but not for the dilution openings in the first row 300.

[0054] Although the foregoing description generally pertains to gas turbine engines, it will be readily understood that gas turbine engines can be implemented in a variety of environments. For example, the engine can be implemented in aircraft, but it can also be implemented in non-aircraft applications, such as power plants, marine applications, or oil and gas production applications. Therefore, this disclosure is not limited to use in aircraft.

[0055] Other aspects of this disclosure are provided for in the subject matter of the following provisions.

[0056] A combustor bushing for a gas turbine combustor, the combustor bushing comprising: an outer bushing including a plurality of outer bushing segments connected together to extend annularly around a combustor centerline, each of the plurality of outer bushing segments including at least one outer bushing slotted dilution opening passing through an outer bushing dilution zone, each outer bushing slotted dilution opening extending in a circumferential direction and including an outer bushing guide wall adjacent to a downstream side of the outer bushing slotted dilution opening; and an inner bushing including a plurality of inner bushing segments connected together to extend annularly around a combustor centerline, each of the plurality of inner bushing segments including at least one inner bushing slotted dilution opening passing through an inner bushing dilution zone, each inner bushing slotted dilution opening extending in a circumferential direction and including an inner bushing guide wall adjacent to a downstream side of the inner bushing slotted dilution opening.

[0057] A burner liner according to any of the foregoing provisions, wherein the burner liner defines an axial direction along the burner centerline, a radial direction extending from the burner centerline, and a circumferential direction extending circumferentially around the burner centerline; each of a plurality of outer liner segments has an outer liner cold surface side and an outer liner hot surface side, and defines an outward flow direction extending axially from an upstream end of the outer liner to a downstream end of the outer liner; an outer liner dilution zone is located between the upstream end and the downstream end of the outer liner; and an outer liner guide wall extends radially inward from the outer liner hot surface side in the radial direction; and each of a plurality of inner liner segments has an inner liner cold surface side and an inner liner hot surface side, and defines an inner liner flow direction extending axially from an upstream end of the inner liner to a downstream end of the inner liner; an inner liner dilution zone is located between the upstream end and the downstream end of the inner liner; and each inner liner guide wall extends radially outward from the inner liner hot surface side in the radial direction.

[0058] The burner bushing according to any of the foregoing provisions, wherein at least one outer bushing slotted dilution opening includes a plurality of outer bushing linear slotted sections extending in the circumferential direction, and at least one inner bushing slotted dilution opening includes a plurality of inner bushing linear slotted sections extending in the circumferential direction.

[0059] The burner bushing according to any of the foregoing provisions, wherein each outer bushing guide wall extends radially inward from the outer bushing hot surface side at an outer bushing guide wall angle relative to the radial and axial directions, and each inner bushing guide wall extends radially outward from the inner bushing hot surface side at an inner bushing guide wall angle.

[0060] The burner bushing according to any of the foregoing provisions, wherein at least one outer bushing slotted dilution opening includes at least one outer bushing curved slotted dilution opening, and at least one inner bushing slotted dilution opening includes at least one inner bushing curved slotted dilution opening.

[0061] According to any of the foregoing provisions, the burner bushing wherein at least one outer bushing curved slot dilution opening is an outer bushing concave curved slot dilution opening relative to the outward flow direction, and at least one inner bushing curved slot dilution opening is an inner bushing concave curved slot dilution opening relative to the inner bushing flow direction.

[0062] According to any of the foregoing provisions, the burner bushing wherein at least one outer bushing curved slot dilution opening is an outer bushing convex curved slot dilution opening relative to the outward flow direction, and at least one inner bushing curved slot dilution opening is an inner bushing convex curved slot dilution opening relative to the inner bushing flow direction.

[0063] According to any of the foregoing provisions, in a first outer bushing segment of a plurality of outer bushing segments, the outer bushing curved slot dilution opening includes a first convex curved slot dilution opening relative to the outward flow direction and a first portion of a concave curved slot connecting dilution opening relative to the outward flow direction, the first portion of the concave curved slot connecting dilution opening being axially downstream of the first convex curved slot dilution opening, circumferentially overlapping the first convex curved slot dilution opening, and extending to the first outer bushing segment and a second outer bushing segment adjacent to the first outer bushing segment. The boundary between the first and second outer bushing segments, and in the second outer bushing segment, the outer bushing curved slot dilution opening includes a second portion of the outer bushing convex curved slot dilution opening relative to the outward flow direction and a second portion of the outer bushing concave curved slot connecting dilution opening relative to the outward flow direction. The second portion of the outer bushing concave curved slot connecting dilution opening is axially downstream of the second portion of the outer bushing convex curved slot dilution opening, circumferentially overlapping the second portion of the outer bushing convex curved slot dilution opening, and extends to the boundary between the first and second outer bushing segments and connects with the first portion of the outer bushing concave curved slot connecting dilution opening. The connection, wherein, in a first inner liner segment of a plurality of inner liner segments, the inner liner curved slot dilution opening includes a first section of inner liner convex curved slot dilution opening relative to the inner liner flow direction and a first portion of inner liner concave curved slot connecting dilution opening relative to the inner liner flow direction, the first portion of inner liner concave curved slot connecting dilution opening being axially downstream of the first section of inner liner convex curved slot dilution opening, circumferentially overlapping the first section of inner liner convex curved slot dilution opening, and extending to the boundary between the first inner liner segment and a second inner liner segment adjacent to the first inner liner segment. Furthermore, in the second inner liner segment, the inner liner curved slot dilution opening includes a second section of the inner liner convex curved slot dilution opening relative to the inner liner flow direction and a second part of the inner liner concave curved slot connecting dilution opening relative to the inner liner flow direction. The second part of the inner liner concave curved slot connecting dilution opening is axially downstream of the second section of the inner liner convex curved slot dilution opening, circumferentially overlaps with the second section of the inner liner convex curved slot dilution opening, and extends to the boundary between the first inner liner segment and the second inner liner segment and connects with the first part of the inner liner concave curved slot connecting dilution opening.

[0064] According to any of the foregoing provisions, in the burner bushing, the second end of the outer bushing curved slot dilution opening is axially arranged downstream of the first end of the outer bushing curved slot dilution opening relative to the circumferential direction, the first end of the outer bushing curved slot dilution opening being opposite to the second end of the outer bushing curved slot dilution opening, and the second end of the inner bushing curved slot dilution opening is axially arranged downstream of the first end of the inner bushing curved slot dilution opening relative to the circumferential direction, the first end of the inner bushing curved slot dilution opening being opposite to the second end of the inner bushing curved slot dilution opening.

[0065] According to any of the foregoing provisions, in a first outer liner segment and a second outer liner segment of a plurality of outer liner segments, the outer liner curved slot dilution opening of the first outer liner segment includes a first segment outer liner curved slot dilution opening and includes a first end and a second end opposite to the first end in the circumferential direction, the second end extending across the boundary between the first outer liner segment and the second outer liner segment, and the outer liner curved slot dilution opening of the second outer liner segment includes a second segment outer liner curved slot dilution opening and includes a third end and a fourth end opposite to the third end in the circumferential direction, the second end of the first segment outer liner curved slot dilution opening is disposed upstream of the third end of the second segment outer liner curved slot dilution opening, and the first segment outer liner curved slot dilution opening overlaps with the second segment outer liner curved slot dilution opening in the circumferential direction at the second end and the third end.

[0066] According to any of the foregoing provisions, the burner bushing includes at least one outer bushing curved slot dilution opening comprising a plurality of outer bushing curved slot dilution openings arranged adjacent to each other in the circumferential direction, and at least one inner bushing curved slot dilution opening comprising a plurality of inner bushing curved slot dilution openings arranged adjacent to each other in the circumferential direction.

[0067] According to any of the foregoing provisions, the first of the plurality of outer bushing curved slot dilution openings and the second of the plurality of outer bushing curved slot dilution openings each include an outer bushing concave curved slot dilution opening relative to the outward flow direction, and the first of the plurality of inner bushing curved slot dilution openings and the second of the plurality of inner bushing curved slot dilution openings each include an inner bushing concave curved slot dilution opening relative to the inner bushing flow direction.

[0068] According to any of the foregoing provisions, the burner bushing, wherein the first of a plurality of outer bushing curved slot dilution openings includes an outer bushing concave curved slot dilution opening relative to the outward flow direction, and the second of a plurality of outer bushing curved slot dilution openings includes an outer bushing convex curved slot dilution opening relative to the outward flow direction, and the first of a plurality of inner bushing curved slot dilution openings includes an inner bushing concave curved slot dilution opening relative to the inner bushing flow direction, and the second of a plurality of inner bushing curved slot dilution openings includes an inner bushing convex curved slot dilution opening relative to the inner bushing flow direction.

[0069] According to any of the foregoing provisions, in a first outer bushing segment of a plurality of outer bushing segments, the outer bushing curved slot dilution opening is a first segment outer bushing concave curved slot dilution opening relative to the outward flow direction; and in a second outer bushing segment of a plurality of outer bushing segments adjacent to the first outer bushing segment, the outer bushing curved slot dilution opening is a second segment outer bushing concave curved slot dilution opening relative to the outward flow direction; and the outer bushing connecting dilution opening connects the first segment outer bushing concave curved slot dilution opening with the second segment outer bushing concave curved slot dilution opening. The dilution opening is connected, and in the first inner liner segment of the plurality of inner liner segments, the inner liner curved slot dilution opening is the first segment inner liner concave curved slot dilution opening relative to the outward flow direction, and in the second inner liner segment adjacent to the first inner liner segment of the plurality of inner liner segments, the inner liner curved slot dilution opening is the second segment inner liner concave curved slot dilution opening relative to the inner liner flow direction, and the inner liner connecting dilution opening connects the first segment inner liner concave curved slot dilution opening with the second segment inner liner concave curved slot dilution opening.

[0070] The burner bushing according to any of the foregoing provisions, wherein the outer bushing connection dilution opening is a linear slot connection dilution opening extending in the circumferential direction, and the inner bushing connection dilution opening is a linear slot connection dilution opening extending in the circumferential direction.

[0071] The burner bushing according to any of the foregoing provisions, wherein the outer bushing connection dilution opening includes an outer bushing connector guide wall that extends radially inward from the outer bushing hot surface side adjacent to the downstream side of the outer bushing connection dilution opening, and the inner bushing connection dilution opening includes an inner bushing connector guide wall that extends radially outward from the inner bushing hot surface side adjacent to the downstream side of the inner bushing connection dilution opening.

[0072] The burner bushing according to any of the foregoing provisions, wherein the outer bushing connection dilution opening is a convex curved slot dilution opening relative to the outer flow direction, and the inner bushing connection dilution opening is a convex curved slot dilution opening relative to the inner bushing flow direction.

[0073] According to any of the foregoing provisions, the burner bushing, wherein the outer bushing curved slot dilution opening comprises a plurality of rows of outer bushing curved slot dilution openings, the first row of outer bushing curved slot dilution openings being axially arranged upstream of the second row of outer bushing curved slot dilution openings, and the first row of outer bushing curved slot dilution openings comprising a plurality of first row outer bushing curved slot dilution openings arranged adjacent to each other in the circumferential direction, and the second row of outer bushing curved slot dilution openings comprising a plurality of second row outer bushing curved slot dilution openings arranged adjacent to each other in the circumferential direction. The groove dilution opening, wherein the inner bushing curved groove dilution opening comprises multiple rows of inner bushing curved groove dilution openings, the first row of inner bushing curved groove dilution openings being axially arranged upstream of the second row of inner bushing curved groove dilution openings, and the first row of inner bushing curved groove dilution openings comprising a plurality of first row inner bushing curved groove dilution openings arranged adjacent to each other in the circumferential direction, and the second row of inner bushing curved groove dilution openings comprising a plurality of second row inner bushing curved groove dilution openings arranged adjacent to each other in the circumferential direction.

[0074] According to any of the foregoing provisions, each of the plurality of first-row outer bushing curved slot dilution openings is a convex curved slot dilution opening relative to the outward flow direction, each of the plurality of second-row outer bushing curved slot dilution openings is a concave curved slot dilution opening, and each of the second-row outer bushing curved slot dilution openings is circumferentially staggered relative to each of the first-row outer bushing curved slot dilution openings, and wherein each of the plurality of first-row inner bushing curved slot dilution openings is a convex curved slot dilution opening relative to the inner bushing flow direction, and each of the plurality of second-row inner bushing curved slot dilution openings is a concave curved slot dilution opening, and each of the second-row inner bushing curved slot dilution openings is circumferentially staggered relative to each of the first-row inner bushing curved slot dilution openings.

[0075] According to any of the foregoing provisions, each of the plurality of first-row outer bushing curved slot dilution openings is a convex curved slot dilution opening relative to the outward flow direction, and each of the plurality of second-row outer bushing curved slot dilution openings is a concave curved slot dilution opening, the second-row outer bushing curved slot dilution openings being circumferentially staggered relative to each first-row outer bushing curved slot dilution opening; and each of the plurality of first-row inner bushing curved slot dilution openings is a convex curved slot dilution opening relative to the inner bushing flow direction, and each of the plurality of second-row inner bushing curved slot dilution openings is a concave curved slot dilution opening, the second-row inner bushing curved slot dilution openings being circumferentially staggered relative to each first-row inner bushing curved slot dilution opening.

[0076] While the foregoing description is directed to some exemplary embodiments of this disclosure, it should be noted that other changes and modifications will be apparent to those skilled in the art and can be made without departing from the spirit or scope of this disclosure. Furthermore, features described in connection with one embodiment of this disclosure may be used in conjunction with other embodiments, even if not explicitly stated above.

Claims

1. A burner bushing for a gas turbine burner, characterized in that, The burner bushing includes: An outer bushing, comprising a plurality of bushing segments connected together to extend annularly around a burner centerline, each of the plurality of bushing segments including at least one bushing curved slot dilution opening passing through it in a bushing dilution zone, each bushing curved slot dilution opening extending circumferentially and having a constant width from a first circumferential end of the bushing curved slot dilution opening to a second circumferential end of the bushing curved slot dilution opening, and including a bushing guide wall adjacent to the downstream side of the bushing curved slot dilution opening; and An inner liner comprising a plurality of inner liner segments connected together to extend annularly around the burner centerline, each of the plurality of inner liner segments including at least one inner liner curved slot dilution opening passing through it in an inner liner dilution zone, each inner liner curved slot dilution opening extending in the circumferential direction and having a constant width from a first circumferential end of the inner liner curved slot dilution opening to a second circumferential end of the inner liner curved slot dilution opening, and including an inner liner guide wall adjacent to the downstream side of each of the at least one inner liner curved slot dilution opening. Each of the at least one outer bushing curved slot dilution opening has a concave or convex shape and is symmetrical with respect to the centerline axis of each of the plurality of outer bushing segments located between the first circumferential end and the second circumferential end; and each of the at least one inner bushing curved slot dilution opening has a concave or convex shape and is symmetrical with respect to the centerline axis of each of the plurality of inner bushing segments located between the first circumferential end and the second circumferential end.

2. The burner bushing according to claim 1, characterized in that, The burner bushing defines an axial direction along the burner centerline, a radial direction extending from the burner centerline, and a circumferential direction extending circumferentially around the burner centerline. Each of the plurality of outer bushing segments has a cold surface side and a hot surface side, and is defined in the axial direction as extending from the upstream end to the downstream end of the outer bushing, the outer bushing dilution zone is located between the upstream end and the downstream end of the outer bushing, and the outer bushing guide wall extends radially inward from the hot surface side of the outer bushing in the radial direction. Each of the plurality of liner segments has a liner cold surface side and a liner hot surface side, and is defined in the axial direction as an inner flow direction extending from the upstream end of the liner to the downstream end of the liner, the liner dilution zone being located between the upstream end and the downstream end of the liner, and each liner guide wall extending radially outward from the liner hot surface side in the radial direction.

3. The burner bushing according to claim 2, characterized in that, Each outer bushing guide wall extends radially inward from the outer bushing hot surface side at an outer bushing guide wall angle relative to the radial and axial directions, and each inner bushing guide wall extends radially outward from the inner bushing hot surface side at an inner bushing guide wall angle.

4. The burner bushing according to claim 2, characterized in that, At least one of the outer bushing curved slot dilution openings is an outer bushing concave curved slot dilution opening relative to the outer flow direction, and at least one inner bushing curved slot dilution opening is an inner bushing concave curved slot dilution opening relative to the inner flow direction.

5. The burner bushing according to claim 2, characterized in that, The at least one outer bushing curved slot dilution opening is an outer bushing convex curved slot dilution opening relative to the outer flow direction, and the at least one inner bushing curved slot dilution opening is an inner bushing convex curved slot dilution opening relative to the inner flow direction.

6. The burner bushing according to claim 2, characterized in that, In the first outer bushing segment of the plurality of outer bushing segments, the outer bushing curved slot dilution opening includes a first convex curved slot dilution opening relative to the outward flow direction and a first portion of a concave curved slot connecting dilution opening relative to the outward flow direction. The first portion of the concave curved slot connecting dilution opening is axially downstream of the first convex curved slot dilution opening, circumferentially overlapping the first convex curved slot dilution opening, and extends to the boundary between the first outer bushing segment and the second outer bushing segment adjacent to the first outer bushing segment. Furthermore, in the second outer bushing segment, the outer bushing curved slot dilution opening includes a second segment of the outer bushing convex curved slot dilution opening relative to the outward flow direction and a second portion of the outer bushing concave curved slot connecting dilution opening relative to the outward flow direction. The second portion of the outer bushing concave curved slot connecting dilution opening is axially downstream of the second segment of the outer bushing convex curved slot dilution opening, circumferentially overlaps with the second segment of the outer bushing convex curved slot dilution opening, and extends to the boundary between the first and second outer bushing segments, connecting with the first portion of the outer bushing concave curved slot connecting dilution opening. In the first inner liner segment of the plurality of inner liner segments, the inner liner curved slot dilution opening includes a first segment of convex curved slot dilution opening relative to the inner flow direction and a first portion of concave curved slot connecting dilution opening relative to the inner flow direction. The first portion of the concave curved slot connecting dilution opening is axially downstream of the first segment of convex curved slot dilution opening, circumferentially overlaps with the first segment of convex curved slot dilution opening, and extends to the boundary between the first inner liner segment and the second inner liner segment adjacent to the first inner liner segment. Furthermore, in the second inner liner segment, the inner liner curved slot dilution opening includes a second segment of inner liner convex curved slot dilution opening relative to the inner flow direction and a second portion of the inner liner concave curved slot connecting dilution opening relative to the inner flow direction. The second portion of the inner liner concave curved slot connecting dilution opening is axially downstream of the second segment of inner liner convex curved slot dilution opening, circumferentially overlaps with the second segment of inner liner convex curved slot dilution opening, and extends to the boundary between the first inner liner segment and the second inner liner segment and connects with the first portion of the inner liner concave curved slot connecting dilution opening.

7. The burner bushing according to claim 1, characterized in that, The second end of the outer bushing curved slot dilution opening is axially arranged downstream of the first end of the outer bushing curved slot dilution opening, relative to the circumferential direction. The first end of the outer bushing curved slot dilution opening is opposite to the second end of the outer bushing curved slot dilution opening. Relative to the circumferential direction, the second end of the inner liner curved slot dilution opening is axially arranged downstream of the first end of the inner liner curved slot dilution opening, and the first end of the inner liner curved slot dilution opening is opposite to the second end of the inner liner curved slot dilution opening.

8. The burner bushing according to claim 1, characterized in that, In the first and second outer bushing segments of the plurality of outer bushing segments, the outer bushing curved slot dilution opening of the first outer bushing segment includes a first segment of outer bushing curved slot dilution opening and includes a first end and a second end opposite to the first end in the circumferential direction, the second end extending across the boundary between the first and second outer bushing segments, and the outer bushing curved slot dilution opening of the second outer bushing segment includes a second segment of outer bushing curved slot dilution opening and includes a third end and a fourth end opposite to the third end in the circumferential direction, the second end of the first segment of outer bushing curved slot dilution opening is arranged upstream of the third end of the second segment of outer bushing curved slot dilution opening, and the first segment of outer bushing curved slot dilution opening overlaps with the second segment of outer bushing curved slot dilution opening in the circumferential direction at the second end and the third end.

9. The burner bushing according to claim 2, characterized in that, The at least one outer bushing curved slot dilution opening includes a plurality of outer bushing curved slot dilution openings arranged adjacent to each other in the circumferential direction, and the at least one inner bushing curved slot dilution opening includes a plurality of inner bushing curved slot dilution openings arranged adjacent to each other in the circumferential direction.

10. The burner bushing according to claim 9, characterized in that, The first and the second of the plurality of outer bushing curved slot dilution openings each include an outer bushing concave curved slot dilution opening relative to the outward flow direction, and the first and the second of the plurality of inner bushing curved slot dilution openings each include an inner bushing concave curved slot dilution opening relative to the inward flow direction.

11. The burner bushing according to claim 9, characterized in that, The first of the plurality of outer bushing curved slot dilution openings includes a concave outer bushing curved slot dilution opening relative to the outward flow direction, and the second of the plurality of outer bushing curved slot dilution openings includes a convex outer bushing curved slot dilution opening relative to the outward flow direction. The first of the plurality of inner liner curved slot dilution openings includes an inner liner concave curved slot dilution opening relative to the inner flow direction, and the second of the plurality of inner liner curved slot dilution openings includes an inner liner convex curved slot dilution opening relative to the inner flow direction.

12. The burner bushing according to claim 2, characterized in that, In the first outer bushing segment of the plurality of outer bushing segments, the outer bushing curved slot dilution opening is a first segment of outer bushing concave curved slot dilution opening relative to the outward flow direction. In the second outer bushing segment adjacent to the first outer bushing segment, the outer bushing curved slot dilution opening is a second segment of outer bushing concave curved slot dilution opening relative to the outward flow direction. The outer bushing connecting dilution opening connects the first segment of outer bushing concave curved slot dilution opening to the second segment of outer bushing concave curved slot dilution opening. In the first inner liner segment of the plurality of inner liner segments, the inner liner curved slot dilution opening is a first segment inner liner concave curved slot dilution opening relative to the inner flow direction, and in the second inner liner segment adjacent to the first inner liner segment of the plurality of inner liner segments, the inner liner curved slot dilution opening is a second segment inner liner concave curved slot dilution opening relative to the inner flow direction, and the inner liner connecting dilution opening connects the first segment inner liner concave curved slot dilution opening and the second segment inner liner concave curved slot dilution opening.

13. The burner bushing according to claim 12, characterized in that, The outer bushing connection dilution opening is a linear slot connection dilution opening extending in the circumferential direction, and the inner bushing connection dilution opening is a linear slot connection dilution opening extending in the circumferential direction.

14. The burner bushing according to claim 13, characterized in that, The outer bushing connection dilution opening includes an outer bushing connector guide wall that extends radially inward from the outer bushing hot surface side adjacent to the downstream side of the outer bushing connection dilution opening. The inner liner connection dilution opening includes an inner liner connector guide wall that extends radially outward from the inner liner hot surface side adjacent to the downstream side of the inner liner connection dilution opening.

15. The burner bushing according to claim 12, characterized in that, The outer bushing connection dilution opening is a convex curved slot dilution opening relative to the outer flow direction, and the inner bushing connection dilution opening is a convex curved slot dilution opening relative to the inner flow direction.

16. The burner bushing according to claim 2, characterized in that, The outer bushing curved slot dilution opening comprises multiple rows of outer bushing curved slot dilution openings. A first row of these openings is axially arranged upstream of a second row. The first row comprises a plurality of adjacent openings arranged in the circumferential direction. The second row comprises a plurality of adjacent openings arranged in the circumferential direction. The inner liner curved slot dilution opening includes multiple rows of inner liner curved slot dilution openings. The first row of inner liner curved slot dilution openings is axially arranged upstream of the second row of inner liner curved slot dilution openings. The first row of inner liner curved slot dilution openings includes a plurality of first row inner liner curved slot dilution openings arranged adjacent to each other in the circumferential direction. The second row of inner liner curved slot dilution openings includes a plurality of second row inner liner curved slot dilution openings arranged adjacent to each other in the circumferential direction.

17. The burner bushing according to claim 16, characterized in that, Each of the plurality of first-row outer bushing curved slot dilution openings is a convex curved slot dilution opening relative to the outward flow direction, and each of the plurality of second-row outer bushing curved slot dilution openings is a concave curved slot dilution opening. Each second-row outer bushing curved slot dilution opening is circumferentially staggered relative to each first-row outer bushing curved slot dilution opening. Each of the plurality of first-row inner bushing curved slot dilution openings is a convex curved slot dilution opening relative to the inner flow direction, and each of the plurality of second-row inner bushing curved slot dilution openings is a concave curved slot dilution opening, with each second-row inner bushing curved slot dilution opening circumferentially staggered relative to each first-row inner bushing curved slot dilution opening.

18. The burner bushing according to claim 16, characterized in that, Each of the plurality of first-row outer bushing curved slot dilution openings is a concave curved slot dilution opening relative to the outward flow direction, and each of the plurality of second-row outer bushing curved slot dilution openings is a convex curved slot dilution opening. Each second-row outer bushing curved slot dilution opening is circumferentially staggered relative to each first-row outer bushing curved slot dilution opening. Each of the plurality of first-row inner bushing curved slot dilution openings is a concave curved slot dilution opening relative to the inner flow direction, and each of the plurality of second-row inner bushing curved slot dilution openings is a convex curved slot dilution opening, with each second-row inner bushing curved slot dilution opening circumferentially staggered relative to each first-row inner bushing curved slot dilution opening.

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