CN205025577U - Exhaust elbow, reverse flow combustor and gas turbine - Google Patents
Exhaust elbow, reverse flow combustor and gas turbine Download PDFInfo
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- CN205025577U CN205025577U CN201520778487.6U CN201520778487U CN205025577U CN 205025577 U CN205025577 U CN 205025577U CN 201520778487 U CN201520778487 U CN 201520778487U CN 205025577 U CN205025577 U CN 205025577U
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- elbow
- exhaust elbow
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- exhaust
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Abstract
The utility model provides an exhaust elbow and reverse flow combustor and gas turbine, reverse flow combustor is last to have this exhaust elbow, and gas turbine includes this reverse flow combustor. The exhaust elbow includes return bend inner wall and return bend outer wall, clearance formation airflow channel between return bend inner wall and the return bend outer wall return bend inner wall epirelief is equipped with a plurality of being located the inside protruding portion of airflow channel. Through setting up the protruding portion on airflow channel, can increase the area of contact of return bend inner wall and air current to can increase the turbulence intensity of air current, strengthen the heat convection between air current and the return bend inner wall, therefore the cooling effect be good, simultaneously, structural strength is good, and the processing cost is low.
Description
Technical field
The utility model relates to the exhaust elbow used in a kind of gas turbine, and the utility model also relates to a kind of reverse flow type combustor and the gas turbine with this exhaust elbow.
Background technique
Current small size gas turbine mainly adopts reverse flow type combustor, and the distinguishing feature of reverse flow type combustor is exactly that air-flow flows into turbine after two half-turns.Therefore, exhaust elbow is structure specific to reverse flow type combustor's burner inner liner.Fig. 1 is the structural representation of the reverse flow type combustor of certain small size gas turbine existing, and as shown in Figure 1, this reverse flow type combustor is made up of burner inner liner cylindrical shell B and exhaust elbow A.
Fig. 2 is the schematic diagram of the exhaust elbow A of this reverse flow type combustor.As shown in Figure 2, this exhaust elbow is made up of elbow internal wall 3 and bend pipe outer wall 4.Composition graphs 1 and Fig. 2, first air enters the gap between elbow internal wall 3 and bend pipe outer wall 4, then enter into high-temperature fuel gas passage, high-temperature fuel gas is produced by the mixture burns of fuel and air in burner inner liner cylindrical shell B, and the high-temperature fuel gas of generation is along the path flow in Fig. 1 shown in arrow.Because exhaust elbow A faces high-temperature fuel gas, be the impact that minimizing high-temperature fuel gas thermal radiation and convection current are washed away, exhaust elbow A machined a large amount of impinging cooling holes or diffusion cooling hole 301, to lower the wall surface temperature of exhaust elbow.
Fig. 3 is the schematic diagram of existing another kind of exhaust elbow, as shown in Figure 3, for improving the cooling effect of exhaust elbow further, exhaust elbow outer wall 4 adds impinging cooling hole 401.
Cooled gas flow in exhaust elbow through diffusion cooling hole 301, and can form one deck air film at the internal surface 3 of elbow internal wall, air film mainly contains two effects: one is avoid high-temperature fuel gas directly to contact with bend pipe wall; Two is carry out convection heat exchange with internal face, reduces the temperature in elbow internal wall face.But the manufacturing process of these impinging cooling holes 401 and diffusion cooling hole 301 is complicated, and processing cost is higher, meanwhile, due to the existence of these Cooling Holes, reduces the structural strength of exhaust elbow A.
Summary of the invention
One of them object of the present utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of good cooling results, processing cost low and the exhaust elbow that structural strength is good.
Another object of the present utility model is to provide a kind of reverse flow type combustor with this exhaust elbow.
3rd object of the present utility model is to provide a kind of gas turbine with this exhaust elbow.
According to an aspect of the present utility model, a kind of exhaust elbow, comprise elbow internal wall and bend pipe outer wall, the gap between described elbow internal wall and bend pipe outer wall forms air-flow path, and described elbow internal wall is convexly equipped with multiple protuberance being positioned at described air-flow path inside.
According to a mode of execution of the present utility model, described protuberance is the hemisphere type convex closure be positioned on elbow internal wall.
According to a mode of execution of the present utility model, described protuberance is the cylinder type convex closure be positioned on elbow internal wall.
According to a mode of execution of the present utility model, described protuberance is set to multiple row on elbow internal wall, and the protuberance of adjacent column staggers mutually.
According to a mode of execution of the present utility model, described bend pipe outer wall is convexly equipped with multiple protuberance being positioned at described air-flow path.
According to a mode of execution of the present utility model, described protuberance has identical structure.
According to another aspect of the present utility model, a kind of reverse flow type combustor, comprises burner inner liner and exhaust elbow, and described exhaust elbow is above-mentioned exhaust elbow.
According to another aspect of the present utility model, a kind of gas turbine, has reverse flow type combustor, and described reverse flow type combustor comprises burner inner liner and exhaust elbow, and described exhaust elbow is above-mentioned exhaust elbow.
As shown from the above technical solution, advantage of the present utility model and good effect are:
The utility model exhaust elbow, by being arranged on the protuberance on air-flow path, can increase the area of contact of elbow internal wall and air-flow, and can increase the turbulence intensity of air-flow, add the convection heat exchange between air blast and elbow internal wall, thus good cooling results.
In addition, exhaust elbow of the present utility model is avoided using Cooling Holes, and adopts the design of protuberance, improves the structural strength of exhaust elbow, reduces the complexity of manufacturing process, cut down finished cost simultaneously.
Accompanying drawing explanation
Describe its example embodiment in detail by referring to accompanying drawing, above-mentioned and further feature of the present utility model and advantage will become more obvious.
Fig. 1 is the structural representation of existing reverse flow type combustor;
Fig. 2 is a kind of structural representation of existing exhaust elbow;
Fig. 3 is the structural representation of another kind of existing exhaust elbow;
Fig. 4 is the structural representation of the utility model embodiment one exhaust elbow;
Fig. 5 is the schematic diagram of the protuberance arrangement mode of the exhaust elbow of the utility model embodiment one.
Embodiment
More fully example embodiment is described referring now to accompanying drawing.But example embodiment can be implemented in a variety of forms, and should not be understood to be limited to mode of execution set forth herein; On the contrary, these mode of executions are provided to make the utility model comprehensively with complete, and the design of example embodiment will be conveyed to those skilled in the art all sidedly.Reference character identical in figure represents same or similar structure, thus will omit their detailed description.
Embodiment one
As shown in Figure 4, present embodiment discloses a kind of exhaust elbow, this exhaust elbow is for the reverse flow type combustor of gas turbine.The exhaust elbow of the present embodiment comprises elbow internal wall 1 and bend pipe outer wall 2, and the gap between this elbow internal wall 1 and bend pipe outer wall 2 forms air-flow path.Gas turbine operationally, first the partial air entering into gas turbine can move along the direction indicated by Fig. 4 arrow in this air-flow path, thus take away the heat of elbow internal wall 1, elbow internal wall 1 is lowered the temperature, and then enters into the burner inner liner of reverse flow type combustor.
This elbow internal wall 1 is convexly equipped with multiple protuberance 101 being positioned at this air-flow path inside.These protuberances 101 can increase the surface area of elbow internal wall 1, when the air-flow path of air between elbow internal wall 1 and bend pipe outer wall 2 moves, the area of contact of air and this elbow internal wall 1 enlarges markedly, improve heat exchange efficiency, and, when air-flow is through these protuberances 101, these protuberances 101 pairs of air-flows produce agitation, the air stream turbulence intensity in air-flow path can be increased, thus reinforcement convection heat exchange, the heat exchange efficiency of elbow internal wall 1 can be improved further, ensure that exhaust elbow has good cooling effect.The structure of these protuberances 101 can be identical, also can structure different, as size dimension is incomplete same.
After protuberance 101 is set, a large amount of diffusion cooling hole need do not bored on elbow internal wall 1, these protuberances 101 can when casting this exhaust elbow direct casting together with elbow internal wall 1, thus improve the structural strength of the present embodiment exhaust elbow, reduce the complexity of manufacturing process, the cost of manufacturing is lower, also can not worry the blocked and problem causing exhaust elbow ablated of diffusion cooling hole due to the exhaust elbow of prior art.
From Fig. 4 and Fig. 5, in the present embodiment, protuberance 101 is for being positioned at the hemisphere type convex closure on elbow internal wall 1.But the structural type of protuberance 101 is not limited only to hemisphere type convex closure in the utility model, such as, also can be other structures such as cylinder type convex closure or pyramid shape convex closure.These protuberances 101 can be set to multiple row along the direction of the air motion in air-flow path on elbow internal wall 1, and the protuberance 101 of adjacent column staggers mutually, to make these protuberances 101 can both contact preferably with air-flow, improve cooling effect.
Also can the multiple protuberance being positioned at described air-flow path of projection on bend pipe outer wall 2, and these protuberances also can be the shape such as hemisphere type convex closure or cylinder type convex closure, so, the cooling effect of air-flow to outer tube outer wall 2 can be improved, thus be conducive to the cooling effect to exhaust elbow entirety.Simultaneously, air-flow is through air-flow path, can ceaselessly collide with the surface of elbow internal wall 1 and bend pipe outer wall 2, thus, protuberance on bend pipe outer wall 2 can also with the protuberance on inwall 1 simultaneously to air-flow generation effect, the turbulivity of air-flow can be improved so further, thus further improve heat exchange efficiency, improve cooling effect.
Embodiment two
The utility model embodiment discloses a kind of reverse flow type combustor (figure slightly) of gas turbine, and this reverse flow type combustor has burner inner liner and exhaust elbow, and wherein exhaust elbow is the exhaust elbow disclosed in the utility model embodiment one.By adopting exhaust elbow of the present utility model, the manufacture cost of reverse flow type combustor can be reduced, and improve the cooling effect of exhaust elbow, considerably improve working life.
Embodiment three
The utility model embodiment discloses a kind of gas turbine (figure slightly), and it has the reverse flow type combustor disclosed in embodiment two.This gas turbine enough reduces the manufacture cost of reverse flow type combustor, and improves the cooling effect of exhaust elbow, considerably improves working life.
Below illustrative embodiments of the present utility model is illustrate and described particularly.Should be appreciated that, the utility model is not limited to disclosed mode of execution, and on the contrary, the utility model intention contains and is included in various amendment in the spirit and scope of claims and equivalent arrangements.
Claims (8)
1. an exhaust elbow, comprises elbow internal wall and bend pipe outer wall, and the gap between described elbow internal wall and bend pipe outer wall forms air-flow path, it is characterized in that: on described elbow internal wall, be convexly equipped with multiple protuberance being positioned at described air-flow path inside.
2. exhaust elbow according to claim 1, is characterized in that, described protuberance is the hemisphere type convex closure be positioned on elbow internal wall.
3. exhaust elbow according to claim 1, is characterized in that, described protuberance is the cylinder type convex closure be positioned on elbow internal wall.
4. exhaust elbow according to claim 1, is characterized in that, described protuberance is set to multiple row on elbow internal wall, and the protuberance of adjacent column staggers mutually.
5. exhaust elbow according to claim 1, is characterized in that, described bend pipe outer wall is convexly equipped with multiple protuberance being positioned at described air-flow path.
6. exhaust elbow according to claim 1, is characterized in that, described protuberance has identical structure.
7. a reverse flow type combustor, comprises burner inner liner and exhaust elbow, it is characterized in that, described exhaust elbow is the arbitrary described exhaust elbow of claim 1 to 5.
8. a gas turbine, has reverse flow type combustor, and described reverse flow type combustor comprises burner inner liner and exhaust elbow, it is characterized in that, described exhaust elbow is the arbitrary described exhaust elbow of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520778487.6U CN205025577U (en) | 2015-10-09 | 2015-10-09 | Exhaust elbow, reverse flow combustor and gas turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520778487.6U CN205025577U (en) | 2015-10-09 | 2015-10-09 | Exhaust elbow, reverse flow combustor and gas turbine |
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| Publication Number | Publication Date |
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| CN205025577U true CN205025577U (en) | 2016-02-10 |
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| CN201520778487.6U Active CN205025577U (en) | 2015-10-09 | 2015-10-09 | Exhaust elbow, reverse flow combustor and gas turbine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120689A (en) * | 2017-04-28 | 2017-09-01 | 中国航发湖南动力机械研究所 | Bend pipe structure and reverse flow type combustor, gas-turbine unit in reflowed combustion room |
| CN111503660A (en) * | 2020-04-29 | 2020-08-07 | 中国航发湖南动力机械研究所 | Exhaust elbow and return flow combustion chamber |
| CN113154455A (en) * | 2021-04-15 | 2021-07-23 | 中国航发湖南动力机械研究所 | Exhaust elbow and backflow combustion chamber |
-
2015
- 2015-10-09 CN CN201520778487.6U patent/CN205025577U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120689A (en) * | 2017-04-28 | 2017-09-01 | 中国航发湖南动力机械研究所 | Bend pipe structure and reverse flow type combustor, gas-turbine unit in reflowed combustion room |
| CN111503660A (en) * | 2020-04-29 | 2020-08-07 | 中国航发湖南动力机械研究所 | Exhaust elbow and return flow combustion chamber |
| CN113154455A (en) * | 2021-04-15 | 2021-07-23 | 中国航发湖南动力机械研究所 | Exhaust elbow and backflow combustion chamber |
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