阅读说明：本技术 燃气轮机及燃烧室用火焰筒 (Gas turbine and combustor liner ) 是由 李珊珊 静大亮 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种燃烧室用火焰筒和燃气轮机,包括筒体和肋片,所述筒体内设有供热燃气流通的燃气通道,所述筒体具有第一端和第二端,所述筒体的第一端适于所述热燃气流入所述燃气通道,所述筒体的第二端适于所述热燃气流出所述燃气通道；所述肋片设在所述筒体的外周壁上,所述肋片沿着所述筒体的周向延伸闭合或所述肋片沿着从所述筒体的第一端至所述筒体的第二端的方向螺旋延伸,所述肋片上设有多个凹坑,多个所述凹坑沿着所述肋片的延伸方向间隔布置。本发明的燃烧室用火焰筒的冷却效果好,冷却效率高,延长了燃气轮机的使用寿命。(The invention discloses a flame tube and a gas turbine for a combustion chamber, which comprise a tube body and fins, wherein a gas channel for hot gas to circulate is arranged in the tube body, the tube body is provided with a first end and a second end, the first end of the tube body is suitable for the hot gas to flow into the gas channel, and the second end of the tube body is suitable for the hot gas to flow out of the gas channel; the fin is established on the periphery wall of barrel, the fin along the circumference extension closure of barrel or the fin is along following the first end of barrel extremely the direction spiral of the second end of barrel extends, be equipped with a plurality of pits on the fin, it is a plurality of the pit along the extending direction interval arrangement of fin. The flame tube for the combustion chamber has good cooling effect and high cooling efficiency, and prolongs the service life of the gas turbine.)

1. A combustor basket, comprising:

a cylinder having a gas passage for hot gas to flow through, the cylinder having a first end and a second end, the first end of the cylinder being adapted for the hot gas to flow into the gas passage and the second end of the cylinder being adapted for the hot gas to flow out of the gas passage;

the fin, the fin is established on the periphery wall of barrel, the fin along the circumference of barrel extends the closure or the fin is along following the first end of barrel extremely the direction spiral of the second end of barrel extends, be equipped with a plurality of pits on the fin, it is a plurality of the pit along the extending direction interval arrangement of fin.

2. The combustor basket of claim 1, wherein the fins have first and second sides disposed in opposition along a direction from the first end of the barrel to the second end of the barrel, the first side being on a leeward side of the fins, the second side being on a windward side of the fins, the plurality of dimples being provided on the second side.

3. The combustor basket of claim 2, wherein the first side and the second side are arcuate surfaces, at least a portion of the first side extends curvedly toward the first end of the basket and is smoothly connected to the peripheral wall of the basket, and at least a portion of the second side extends curvedly toward the second end of the basket and is smoothly connected to the peripheral wall of the basket.

4. The combustor basket of claim 3, wherein the curvature of said second side is less than the curvature of said first side.

5. The combustor basket of claim 1, wherein the dimples are circular dimples or oval dimples.

6. The combustor basket of claim 1, wherein the cylinder includes a first section and a second section, the first section having a peripheral side with a smaller airflow velocity than the second section, the first section having a peripheral side rib height dimension H1 greater than the second section having a peripheral side rib height dimension H2.

7. The combustor basket of claim 6 wherein the first peripheral side rib has a height dimension H1 of 0.8 mm to 1.2 mm.

8. The combustor basket of claim 1, wherein a height profile of at least some of the fins along a direction of extension of the fins or a cross-section of at least some of the fins is one or a combination of a saw-tooth shape, a city wall shape, and a lace shape.

9. The combustor basket of any one of claims 1-8, wherein the plurality of ribs are spaced apart from one another in a direction from the first end of the barrel to the second end of the barrel, the ribs having a width dimension W of 0.5 mm to 1.5 mm, and a spacing L between two adjacent ribs being 5 mm to 20 mm.

10. A gas turbine engine, characterized by comprising a combustor basket according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of cooling of a flame tube for a combustion chamber, in particular to a flame tube for a combustion chamber and a gas turbine.

Background

The combustion chamber of the gas turbine is internally provided with a fuel injection device, a flame tube, a transition section and the like, the fuel injection device is used for injecting fuel to the flame tube and mixing and burning the fuel and gas in the combustion chamber, and hot combustion gas generated by burning is conveyed to the turbine through the flame tube and the transition section. Since the liner needs to operate at high temperature conditions, the liner needs to be cooled efficiently to meet expected service life requirements. However, in the related art, the cooling effect of the flame tube has a large difference in different working states of different gas turbines, especially for a low-load point, the flow speed in the outer annular cavity of the flame tube is low, and a strong high-temperature region still exists in a part of regions, so that the cooling effect is reduced, and the service life of the gas turbine is influenced.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides the combustor liner for the combustion chamber, which has the advantages of good cooling effect, high cooling efficiency and prolonged service life of the gas turbine.

The embodiment of the invention also provides a gas turbine using the combustor liner.

A combustor basket according to an embodiment of the present invention includes: a cylinder having a gas passage for hot gas to flow through, the cylinder having a first end and a second end, the first end of the cylinder being adapted for the hot gas to flow into the gas passage and the second end of the cylinder being adapted for the hot gas to flow out of the gas passage; the fin, the fin is established on the periphery wall of barrel, the fin along the circumference of barrel extends the closure or the fin is along following the first end of barrel extremely the direction spiral of the second end of barrel extends, be equipped with a plurality of pits on the fin, it is a plurality of the pit along the extending direction interval arrangement of fin.

According to the combustor flame tube provided by the embodiment of the invention, the combustor flame tube has the advantages of good cooling effect and high cooling efficiency, and the service life of a gas turbine is prolonged.

In some embodiments, the fin has a first side and a second side arranged oppositely along a direction from the first end of the barrel to the second end of the barrel, the first side is located on a leeward side of the fin, the second side is located on a windward side of the fin, and the plurality of concave pits are arranged on the second side.

In some embodiments, the first side surface and the second side surface are both arc-shaped surfaces, at least a part of the first side surface extends towards the first end of the cylinder body in a bent mode and is smoothly connected with the peripheral wall of the cylinder body, and at least a part of the second side surface extends towards the second end of the cylinder body in a bent mode and is smoothly connected with the peripheral wall of the cylinder body.

In some embodiments, the curvature of the second side is less than the curvature of the first side.

In some embodiments, the dimples are circular dimples or oval dimples.

In some embodiments, the cylinder includes a first section and a second section, the airflow velocity on the peripheral side of the first section is less than the airflow velocity on the peripheral side of the second section, and the height dimension H1 of the peripheral side of the first section is greater than the height dimension H2 of the peripheral side of the second section.

In some embodiments, the first peripheral side rib has a height dimension H1 of 0.8 mm to 1.2 mm.

In some embodiments, a height profile of at least a portion of the fins along an extending direction of the fins or a cross-section of at least a portion of the fins is one or a combination of saw-tooth shape, city wall shape, and lace shape.

In some embodiments, the plurality of fins are spaced apart from each other in a direction from the first end of the barrel to the second end of the barrel, the width dimension W of the fins is 0.5 mm to 1.5 mm, and the distance L between two adjacent fins is 5 mm to 20 mm.

The gas turbine according to the embodiment of the present invention includes a combustor basket according to any one of the embodiments described above.

Drawings

FIG. 1 is a perspective view of the overall structure of a flame tube according to an embodiment of the invention.

FIG. 2 is a schematic side view of the liner of FIG. 1.

Fig. 3 is a partially enlarged schematic view at a in fig. 2.

Fig. 4 is a partially enlarged schematic view at B in fig. 2.

Fig. 5 is a schematic cross-sectional view at B in fig. 2.

Fig. 6 is a schematic cross-sectional view at B in fig. 2 according to another embodiment of the present invention.

FIG. 7 is a schematic view of a serrated rib in accordance with an embodiment of the present invention.

FIG. 8 is a schematic view of a city wall fin according to an embodiment of the invention.

FIG. 9 is a schematic view of a lace-like rib according to an embodiment of the present invention.

FIG. 10 is a schematic diagram of a combination rib according to an embodiment of the present invention.

Reference numerals:

a cylinder body 1; a gas channel 11;

a rib 2; a first side 21; a second side 22; rib outer peripheral surfaces 23; a flow guide groove 24; and a pit 25.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 5, a combustor basket according to an embodiment of the present invention includes a body 1 and ribs 2.

A gas channel 11 for hot gas circulation is arranged in the cylinder body 1, the cylinder body 1 is provided with a first end and a second end, the first end of the cylinder body 1 is suitable for hot gas to flow into the gas channel 11, and the second end of the cylinder body 1 is suitable for hot gas to flow out of the gas channel 11.

Specifically, as shown in fig. 1 and fig. 2, a gas channel 11 is provided in the cylinder 1, the first end of the cylinder 1 is the front end of the cylinder 1, and the second end of the cylinder 1 is the rear end of the cylinder 1, during use, hot gas can flow into the gas channel 11 from the front end of the cylinder 1, and then flow out from the rear end of the cylinder 1.

The fins 2 are arranged on the peripheral wall of the cylinder 1, the fins 2 extend and close along the circumferential direction of the cylinder 1 or the fins 2 extend spirally along the direction from the first end of the cylinder 1 to the second end of the cylinder 1, a plurality of concave pits 25 are arranged on the fins 2, and the plurality of concave pits 25 are arranged at intervals along the extending direction of the fins 2.

Specifically, as shown in fig. 1 and fig. 2, the fins 2 may be annular, the fins 2 are provided on the outer peripheral side of the cylinder 1 and are closed into a circle along the circumferential direction of the cylinder 1, the fins 2 may be plural, the plural fins 2 are arranged at intervals along the axial direction of the cylinder 1, each fin 2 is provided with plural concave pits 25, and as shown in fig. 3, the plural concave pits 25 on each fin 2 are arranged at intervals along the extending direction of the fin 2.

It will be understood that in other embodiments, the fins 2 on the cylinder 1 may be spirally wound on the outer periphery of the cylinder 1, for example, each fin 2 on the cylinder 1 may be arranged at intervals along the circumference of the cylinder 1, and each fin 2 is spirally wound in the direction from the first end of the cylinder 1 to the second end of the cylinder 1. Each of the fins 2 is also provided with a plurality of recesses 25, and the plurality of recesses 25 are arranged at intervals along the spiral winding direction of the fins 2.

According to the combustor basket of the embodiment of the present invention, the separation vortex can be formed downstream of the rib outer peripheral surface 23, and the separation vortex can destroy the main flow structure of the outer side surface of the combustor basket, so that the heat exchange on the outer peripheral side of the combustor basket can be enhanced. In addition, as shown in fig. 8, a diversion groove 24 is formed between two adjacent fins 2, turbulent flow is formed in the diversion groove 24, because two adjacent diversion grooves 24 are separated by the fins 2, the turbulent flow in the diversion groove 24 is relatively independent and does not interfere with each other, when a local main flow changes, the turbulent flow structure in the adjacent diversion groove 24 is not influenced, and therefore, the cooling effect is more stable.

In addition, because the pits 25 are additionally arranged on the fins 2, the pits 25 have the function of increasing the heat exchange area between the fins 2 and the main flow on one hand, so that the cooling effect and the cooling efficiency of the flame tube can be further enhanced; on the other hand, when the airflow flows through the concave pit 25, turbulent flow can be formed in the concave pit 25, so that the flowing of the airflow can be delayed, the heat exchange between the fins 2 and the main flow is more sufficient, and the cooling effect and the cooling efficiency of the flame tube are further enhanced. Secondly, the recesses 25 also have the effect of increasing the local structural strength of the ribs 2, so that good operation of the flame tube is ensured.

In some embodiments, the fin 2 has a first side 21 and a second side 22 oppositely arranged in a direction from the first end of the cylinder 1 to the second end of the cylinder 1, the first side 21 being located on a leeward side of the fin 2, the second side 22 being located on a windward side of the fin 2, and a plurality of recesses 25 being provided on the second side 22.

Specifically, as shown in fig. 3, the first side 21 is a front side of the rib 2, and the second side 22 is a rear side of the rib 2, because during use, a main flow on the outer periphery of the flame tube flows in a direction from the rear to the front, the first side 21 is a leeward side of the rib 2, the second side 22 is a windward side of the rib 2, and the concave pits 25 on each rib 2 are arranged on the second side 22 of the rib 2.

Due to the pits 25 arranged on the second side surface 22, the pits 25 can act with turbulence in the guide grooves 24 to further disturb the airflow, so that the heat exchange can be further enhanced to improve the cooling efficiency.

In some embodiments, the first side surface 21 and the second side surface 22 are both arc-shaped surfaces, at least a part of the first side surface 21 extends to the first end of the cylinder body 1 in a bending way and is smoothly connected with the peripheral wall of the cylinder body 1, and at least a part of the second side surface 22 extends to the second end of the cylinder body 1 in a bending way and is smoothly connected with the peripheral wall of the cylinder body 1.

Specifically, as shown in fig. 3 and 4, the first side surface 21 is a front side surface of the rib 2, the second side surface 22 is a rear side surface of the rib 2, the first side surface 21 and the outer peripheral wall of the cylinder 1 are in rounded transition, and the second side surface 22 and the outer peripheral wall of the cylinder 1 are in rounded transition. From this, on the one hand can guarantee the joint strength of fin 2 and barrel 1, on the other hand has still avoided the condition that produces the dead angle in the water conservancy diversion recess 24 for the torrent in the water conservancy diversion recess 24 can smoothly flow, is favorable to improving the heat dissipation.

In some embodiments, the curvature of the second side 22 is less than the curvature of the first side 21.

Specifically, as shown in fig. 4, the curvature of the first side surface 21 is generally greater than that of the second side surface 22, that is, the first side surface 21 has a greater amount of curvature, and the second side surface 22 is relatively flat, so that, since the airflow on the outer peripheral side of the flame tube flows in the rear-to-front direction, the turbulent flow in the guide grooves 24 behind the fins 2 acts on the second side surface 22, and since the second side surface 22 is relatively flat, the turbulent flow can flow in the rear-to-front direction generally, which is beneficial to improving the cooling efficiency.

Secondly, the turbulent flow in the guide groove 24 in front of the rib 2 acts on the first side surface 21, and the first side surface 21 guides the turbulent flow to flow outwards along the radial direction of the cylinder 1 and impact the main flow, so that the effect of enhancing the air flow disturbance to enhance the heat exchange is achieved.

In some embodiments, as shown in fig. 3 and 4, the dimples 25 may be circular dimples 25 or oval dimples 25. Therefore, no edge angle exists in the concave pit 25, and the air flow is smoother. It is understood that in other embodiments, the recess 25 may be a cylindrical recess 25, a rectangular recess 25, or the like.

In some embodiments, the cylinder 1 includes a first section and a second section, the airflow velocity on the outer periphery of the first section is less than the airflow velocity on the outer periphery of the second section, and the height dimension H1 of the fins 2 on the outer periphery of the first section is greater than the height dimension H2 of the fins 2 on the outer periphery of the second section.

Specifically, as shown in fig. 2, the barrel 1 may include a first section (not shown) and a second section (not shown) in the front-to-rear direction, both of which are axial sections of the barrel 1, during use of the liner, the gas flow rate at the outer periphery of the first segment is less than the gas flow rate at the outer periphery of the second segment, it being noted that the position of the first and second segments may be determined empirically and/or by means of sensor monitoring, for example, in the design stage, the flame tube may be first installed in the combustion chamber, and then a plurality of sensors may be provided on the outer circumferential side of the flame tube, the sensors may sense the air flow velocity, and then simulating the operation condition of the gas turbine, and confirming the position of the first section on the cylinder body 1 by monitoring the air flow speed of each section of the cylinder body 1, wherein the rest positions on the cylinder body 1 except the first section can be regarded as the second section.

As shown in fig. 6, the height dimension H1 of the element 2 corresponding to the first segment is greater than the height dimension H2 of the element 2 corresponding to the second segment. The larger the height dimension of the fins 2, the more remarkable the turbulent flow effect of the fins 2, and the better the cooling effect and cooling efficiency at that point, whereby the cooling performance under the condition of the load (low flow rate) on the outer peripheral side of the cylinder 11 can be improved by increasing the height dimension H1 of the first-stage outer peripheral-side fins 2.

In some embodiments, the height of the fins 2 on the outer periphery of the first section varies along the extension of the fins 2.

Specifically, the height dimension of the first-stage outer circumferential-side fins 2 may be gradually increased, gradually decreased, or first increased and then decreased in the front-to-rear direction. Because the height dimension of the fins 2 gradually changes along with the extension direction of the fins 2, the disturbance of the main flow structure can be further increased due to the change of the height dimension, and a disturbed flow and a secondary flow vortex are formed, so that the cooling efficiency of the flame tube is further improved. Due to the enhanced cooling effect and cooling efficiency of the combustor basket, the service life of the combustor basket is increased and the operation is more stable, thereby facilitating the extension of the service life of the gas turbine.

In some embodiments, the height dimension H1 of the first peripheral rib section 2 is 0.8 mm to 1.2 mm.

Specifically, as shown in fig. 6, the height dimension H1 of the fins 2 on the outer peripheral side of the first stage may be any value between 0.8 mm and 1.2 mm, for example, the height dimension H1 may be 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, or the like. The height H1 is designed in the above-mentioned range to achieve a turbulent flow effect on the one hand and to avoid the situation that the fins 2 are high enough to disturb the main flow on the other hand.

In some embodiments, the height profile of at least a part of the fins 2 in the extension direction of the fins 2 or the cross-section of at least a part of the fins 2 is one or a combination of saw-tooth, city wall, lace.

Specifically, as shown in fig. 5, a cross section of the rib 2 is shown, a height section of the rib 2 in the extending direction is a section perpendicular to the cross section of the rib 2, and the section of the rib 2 may be one of a saw-tooth shape, a city wall shape and a lace shape, or a combination of two or more of the saw-tooth shape, the city wall shape and the lace shape, as shown in fig. 7 to 10. Similarly, the cross section of the rib 2 may be one of a saw-tooth shape, a city wall shape and a lace shape, or a combination of two or more of a saw-tooth shape, a city wall shape and a lace shape, as shown in fig. 7 to 10.

Therefore, the turbulent flow of the main flow structure can be further enhanced, and the cooling effect and the cooling efficiency are further enhanced.

In some embodiments, the width dimension W of the fins 2 is 0.5 mm to 1.5 mm. Specifically, as shown in fig. 5, the width dimension W of the rib 2 may be any value between 0.5 mm and 1.5 mm, for example, the width dimension W may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc.

In some embodiments, the fins 2 are multiple, the multiple fins 2 are arranged at intervals along the front-to-back direction, and the distance L between two adjacent fins 2 may be any value between 5 mm and 20 mm, for example, the distance L may be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, 18 mm, 19 mm, 20 mm, and the like.

A gas turbine according to an embodiment of the present invention is described below.

According to the embodiment of the invention, the gas turbine comprises the flame tube, and the flame tube can be the flame tube described in the embodiment. Specifically, the gas turbine comprises a combustion chamber, a flame tube, a fuel injection device and a transition section, wherein the flame tube is arranged in the combustion chamber, the fuel injection device is arranged at the front end of the flame tube, the transition section is connected to the rear end of the flame tube, the transition section is a transition pipe, and the transition section is connected between the flame tube and the turbine. Part of air compressed by the air compressor flows from back to front along the peripheral side of the flame tube, exchanges heat with the tube body and the fins on the peripheral side of the flame tube, and then cools the flame tube, returns back to flow into the flame tube through the front end device of the flame tube, and is mixed with fuel sprayed by the fuel spraying device for combustion.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.