CN114484497A - Cooling mixing hopper of compact integrated design - Google Patents
Cooling mixing hopper of compact integrated design Download PDFInfo
- Publication number
- CN114484497A CN114484497A CN202111444432.8A CN202111444432A CN114484497A CN 114484497 A CN114484497 A CN 114484497A CN 202111444432 A CN202111444432 A CN 202111444432A CN 114484497 A CN114484497 A CN 114484497A
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- China
- Prior art keywords
- cooling
- hopper
- mixing
- funnel
- flame tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001816 cooling Methods 0.000 title claims abstract description 90
- 238000002156 mixing Methods 0.000 title claims abstract description 86
- 238000002485 combustion reaction Methods 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims description 21
- 239000002737 fuel gas Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 230000035515 penetration Effects 0.000 abstract description 6
- 238000002679 ablation Methods 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 239000000112 cooling gas Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/03043—Convection cooled combustion chamber walls with means for guiding the cooling air flow
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to a cooling mixing hopper with compact integrated design, and belongs to the technical field of combustion chambers of gas turbines. The cooling mixing hopper is applied to a combustion chamber of a gas turbine and welded at the position of a mixing hole of a flame tube; the design of the arc inner profile of the bucket cap of the mixing bucket can increase the incidence angle of the mixing air jet, increase the flow coefficient of the mixing hole and reduce the pressure loss; the design of the short side of the windward side and the long side of the leeward side of the inclined funnel can reduce the erosion and ablation of high-temperature gas to the windward side, and the existence of the long side can effectively enhance the jet penetration depth of the mixed air; the inclined funnel avoids the cooling requirement of the windward side, and reduces the cooling air of the funnel of the half windward side; the integrated cooling circular seam is closer to the wall surface of the blending hopper, the requirement on cooling air quantity is less, the cooling efficiency is higher, and the cooling effect meeting the index requirement can be obtained.
Description
Technical Field
The invention belongs to the technical field of combustion chambers of gas turbines, and particularly relates to a cooling mixing hopper with a compact integrated design.
Background
Air at an outlet 01 of a gas compressor of the gas turbine enters a combustion chamber, flows through a diffuser 02 for speed reduction and diffusion, is divided into three air flows, one air flow enters a main combustion area 05 through a head part 04 of a flame tube 03 and is mixed with fuel oil sprayed from the head part to be combusted into high-temperature fuel gas, and the other two air flows enter the flame tube through mixing holes 08 of inner and outer annular cavities (06 and 07) and flow out of the flame tube after being fully mixed with the high-temperature fuel gas.
The mixing hole of the traditional gas turbine combustion chamber adopts a flat circular hole structure (see figure 2a), and the structure is simple and easy to process under the condition of meeting the mixing performance requirement. Along with the technical development of a high-performance high-thrust gas turbine, the speed of air flow in a combustion chamber is faster and faster, the radial size is gradually increased, and for a flat and round mixing hole, the depth of the air flow penetrating into a flame tube is gradually difficult to meet the performance requirement of gas mixing, so that a structure of a mixing hopper (see fig. 2b) is developed, namely a funnel-shaped structure is welded at the position of the mixing hole of the flame tube, and mixing air is sent to the required position in the flame tube to be directly mixed with high-temperature gas.
The mixing hopper solves the problem of mixing of high-temperature fuel gas, but the mixing hopper extends into the flame tube and is easily ablated by the high-temperature fuel gas, and special cold air is usually required to be introduced to protect the mixing hopper, as shown in fig. 2b, cooling holes are formed in the wall surface of the adjacent flame tube at the downstream of the mixing hopper, and the cooling holes and the mixing hopper are of independent structures, so that the problems of performance and structure matching of the cooling holes and the mixing hopper exist, the wall sticking effect of cooling air flow to the mixing hopper is poor, and the consumption of cooling air flow is large.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to design a cooling mixing hopper for a combustion chamber of a gas turbine, increase the penetration depth of mixing jet flow and improve the mixing performance.
(II) technical scheme
In order to solve the technical problem, the invention provides a cooling mixing hopper with a compact integrated design, which comprises a hopper cap and a hopper, wherein cooling seams are also arranged on the cooling mixing hopper;
the funnel is of a circular tubular structure, the inner diameter and the outer diameter of the funnel are respectively D and E, the funnel is an inclined plane funnel, the lengths of the short edge and the long edge of the funnel are respectively t + b and t + c, and the inclination angle of the inclined plane of the funnel is determined by the length of the short edge and the length of the long edge; t is the wall thickness of the flame tube of the combustion chamber; b. c is a preset parameter;
the hopper cap is connected with the funnel, the hopper cap is wider than the single side of the funnel and is used for being lapped on the flame tube of the combustion chamber, and the inner molded surface of the hopper cap is an arc surface with the radius R;
the cooling seams are arranged on the hopper cap and penetrate through the hopper cap, the cooling seams are annular seams concentric with the hopper, the inner diameter of each cooling seam is the same as the outer diameter of the hopper, the two cooling seams are symmetrical on the cross section where the short side and the long side of the hopper are located and distributed on the two sides of the long side, the included angle between the two cooling seams is alpha, and the circumferential angles of the two cooling seams are 180-alpha in total.
Preferably, the wall thickness t of the flame tube of the combustion chamber is 1-2 mm and is determined by the working temperature of the combustion chamber.
Preferably, the inner diameter D of the funnel depends on the design values of the mixing holes of the flame tube of different combustion chambers.
Preferably, the outer diameter E of the funnel is 2-4 mm larger than D.
Preferably, the value of b in the length t + b of the short side of the funnel is 3-6 mm, and the value of c in the length t + c of the long side of the funnel is 10-15 mm.
Preferably, the arc radius R of the inner profile of the bucket cap takes 3 mm.
Preferably, the included angle alpha between the cooling seams is 30 degrees.
The invention also provides a use method of the cooling mixing hopper, the cooling mixing hopper is applied to a flame tube of a combustion chamber, a mixing round hole is formed in the flame tube of the combustion chamber, the mixing hopper is inserted into the mixing round hole, the funnel extends into one side of high-temperature gas, one side of a short side is in the windward direction, one side of a long side is in the leeward direction, and the mixing hopper and the flame tube of the combustion chamber are welded and fixed at the contact position of the cold gas side.
The invention also provides a working method of the cooling mixing hopper, which is characterized by comprising the following steps of: the cold air outside the flame tube of the combustion chamber enters the flame tube of the combustion chamber through the mixing hopper, is mixed with the high-temperature fuel gas inside the flame tube of the combustion chamber, and uniformly flows to the outlet of the flame tube.
The invention also provides a gas turbine combustor flame tube which comprises the cooling mixing hopper.
(III) advantageous effects
The cooling mixing hopper is applied to a combustion chamber of a gas turbine and welded at the position of a mixing hole of a flame tube; the design of the arc inner profile of the bucket cap of the mixing bucket can increase the incidence angle of the mixing air jet, increase the flow coefficient of the mixing hole and reduce the pressure loss; the design of the short side of the windward side and the long side of the leeward side of the inclined funnel can reduce the erosion and ablation of high-temperature gas to the windward side, and the existence of the long side can effectively enhance the jet penetration depth of the mixed air; the inclined funnel avoids the cooling requirement of the windward side, and reduces the cooling air of the funnel of the half windward side; the integrated cooling circular seam is closer to the wall surface of the blending hopper, the requirement on cooling air quantity is less, the cooling efficiency is higher, and the cooling effect meeting the index requirement can be obtained; the cooling mixing hopper of integrated design, the cooling matches well with the mixing performance, and simple structure is compact, but whole machine tooling shaping, be convenient for with the welding of flame tube, and structural strength can effectively be guaranteed in the design of contained angle between the cooling seam.
Drawings
FIG. 1 is a schematic view of a gas turbine combustor;
FIGS. 2a and 2b are schematic views of a conventional mixing hole;
FIG. 3 is a schematic view of a cooling blend hopper according to the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 6 is a schematic view of the position of the blending hopper of the present invention applied to the combustor basket;
fig. 7 is a diagram of the cooling effect.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
The cooling mixing hopper is integrally designed for the combustion chamber of the gas turbine, has a simple and compact structure, can increase the penetration depth of mixing jet flow and improve the mixing performance, requires less cooling gas, has high cooling efficiency, is convenient to machine and weld with a flame tube, and can effectively ensure the structural strength.
The cooling mixing hopper with the compact integrated design is applied to the position of a flame tube of a combustion chamber. As shown in fig. 3 to 5, the cooling blending hopper comprises a hopper cap and a hopper, and cooling slits are further arranged on the cooling blending hopper;
the funnel is the pipe column structure, and inside and outside diameter is D and E respectively, and the funnel is the inclined plane funnel, and the length on funnel minor face and long limit is t + b and t + c respectively, confirms the inclination on funnel inclined plane by minor face length and long limit length, and t is combustion chamber flame tube wall thickness.
The hopper cap is connected with the funnel, the height of the hopper cap is 2mm, the outer diameter of the hopper cap is E +4mm, the hopper cap is 2mm wider than the single side of the funnel and is used for being lapped on a flame tube of a combustion chamber, and the inner molded surface of the hopper cap is an arc surface with the radius R.
The cooling seam is arranged on the hopper cap and penetrates through the hopper cap, the cooling seam is a circular seam concentric with the hopper, the outer diameter and the inner diameter of the cooling seam are respectively E +2 and E, namely the inner diameter is the same as the outer diameter of the hopper, the radial width of the cooling seam is 1mm, the number of the cooling seams is two, the cooling seams are distributed on two sides of a long edge symmetrically by using the cross sections where the short edge and the long edge of the hopper are located, the included angle between the two cooling seams is alpha, and the circumferential angles of the two cooling seams are 180-alpha in total.
The relevant dimensions are as follows:
firstly, the wall thickness t of a flame tube of the combustion chamber is generally 1-2 mm and is determined by the working temperature of the combustion chamber;
the inner diameter D of the funnel depends on the design values of mixing holes of flame tubes of different combustion chambers;
the outer diameter E of the funnel is 2-4 mm larger than that D;
b in the short edge length t + b of the funnel takes a value of 3-6 mm;
c in the long side length t + c of the funnel takes a value of 10-15 mm;
sixthly, taking the arc radius R of the inner profile of the funnel cap to be 3 mm;
and the included angle alpha between the cooling seams is 30 degrees.
As shown in fig. 6, when the cooling mixing hopper with compact and integrated design of the present invention is applied to the position of the combustor liner, a mixing circular hole is formed at a suitable position of the combustor liner, the mixing hopper is inserted into the mixing circular hole, the funnel extends into the high temperature gas side, the short side is in the windward direction, the long side is in the leeward direction, and the mixing hopper and the combustor liner are welded and fixed at the contact position of the cold air side.
The working principle of the cooling mixing hopper of the invention is as follows:
cold air outside the flame tube enters the flame tube through the mixing hopper, is mixed with high-temperature fuel gas inside the flame tube, and uniformly flows to the outlet of the flame tube;
the design of the arc inner profile of the hopper cap can increase the incident angle of the mixing air entering the mixing hopper, increase the flow coefficient of the mixing hole and reduce the pressure loss; the design of the short side of the windward side and the long side of the leeward side of the inclined plane funnel can reduce the erosion and ablation of high-temperature gas on the windward side, and the jet penetration depth of the mixed air can be effectively enhanced due to the existence of the long side.
The inclined funnel avoids the cooling requirement of the windward side, and reduces the cooling air of the funnel of the half windward side; compare traditional funnel rear cooling hole, the cooling circumferential weld of integration more presses close to the mixing fill wall, and the cooling tolerance demand is few, cooling efficiency is higher, can obtain the cooling effect that satisfies the index requirement (see figure 7, the incoming flow air conditioning temperature 600K, high temperature gas temperature 2000K, under the cooling gas protection, the mixing fill solidus highest temperature 794K).
The cooling mixing hopper with the integrated design has the advantages of good matching of cooling and mixing performances, simple and compact structure, capability of being integrally machined and formed, convenience for welding with a flame tube, less cooling gas requirement, capability of effectively improving the mixing penetration depth and the mixing strength, capability of effectively ensuring the structural strength due to the design of the included angle between the cooling seams, and contribution to improving the performance of a combustion chamber.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A cooling mixing hopper with compact integrated design is characterized by comprising a hopper cap and a hopper, wherein cooling seams are further arranged on the cooling mixing hopper;
the funnel is of a circular tubular structure, the inner diameter and the outer diameter of the funnel are respectively D and E, the funnel is an inclined plane funnel, the lengths of the short edge and the long edge of the funnel are respectively t + b and t + c, and the inclination angle of the inclined plane of the funnel is determined by the length of the short edge and the length of the long edge; t is the wall thickness of the flame tube of the combustion chamber; b. c is a preset parameter;
the hopper cap is connected with the funnel, the hopper cap is wider than the single side of the funnel and is used for being lapped on the flame tube of the combustion chamber, and the inner molded surface of the hopper cap is an arc surface with the radius R;
the cooling seams are arranged on the hopper cap and penetrate through the hopper cap, the cooling seams are annular seams concentric with the hopper, the inner diameter of each cooling seam is the same as the outer diameter of the hopper, the two cooling seams are symmetrical on the cross section where the short side and the long side of the hopper are located and distributed on the two sides of the long side, the included angle between the two cooling seams is alpha, and the circumferential angles of the two cooling seams are 180-alpha in total.
2. The cooling blending hopper according to claim 1, wherein the wall thickness t of the combustor liner is 1-2 mm, depending on the operating temperature of the combustor.
3. The cooling blender hopper of claim 2, wherein the inner diameter D of the funnel is dependent upon different combustor liner blending hole design values.
4. The cooling blender hopper of claim 3, wherein the outer diameter E of the funnel is 2 to 4mm greater than D.
5. The cooling blending hopper according to claim 4, wherein b is 3-6 mm in the length t + b of the short side of the funnel, and c is 10-15 mm in the length t + c of the long side of the funnel.
6. The cooling blender bucket of claim 5, wherein the radius R of the arc of the bucket cap inner profile is 3 mm.
7. The cooling blender hopper of claim 6, wherein the cooling slot included angle α is 30 °.
8. The use method of the cooling mixing hopper as claimed in any one of claims 1 to 7, wherein the cooling mixing hopper is applied to a combustor basket, a mixing round hole is formed in the combustor basket, the mixing hopper is inserted into the mixing round hole, the hopper extends into the high-temperature gas side, the short side is in the windward direction, the long side is in the leeward direction, and the mixing hopper and the combustor basket are welded and fixed at the contact position of the cold gas side.
9. A method of operating a cooling blender hopper according to any one of claims 1 to 7, comprising the steps of: the cold air outside the flame tube of the combustion chamber enters the flame tube of the combustion chamber through the mixing hopper, is mixed with the high-temperature fuel gas inside the flame tube of the combustion chamber, and uniformly flows to the outlet of the flame tube.
10. A gas turbine combustor basket comprising the cooling blender of any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111444432.8A CN114484497A (en) | 2021-11-30 | 2021-11-30 | Cooling mixing hopper of compact integrated design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111444432.8A CN114484497A (en) | 2021-11-30 | 2021-11-30 | Cooling mixing hopper of compact integrated design |
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| Publication Number | Publication Date |
|---|---|
| CN114484497A true CN114484497A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111444432.8A Pending CN114484497A (en) | 2021-11-30 | 2021-11-30 | Cooling mixing hopper of compact integrated design |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115978588A (en) * | 2023-01-29 | 2023-04-18 | 中国航发沈阳发动机研究所 | Mixing funnel for flame tube of combustion chamber |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5235805A (en) * | 1991-03-20 | 1993-08-17 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." | Gas turbine engine combustion chamber with oxidizer intake flow control |
| GB2353589A (en) * | 1999-08-24 | 2001-02-28 | Rolls Royce Plc | Combustor wall arrangement with air intake port |
| DE102012015452A1 (en) * | 2012-08-03 | 2014-04-24 | Rolls-Royce Deutschland Ltd & Co Kg | Gas turbine combustion chamber wall for gas turbine engine, has mixed air openings formed by tubular air guide elements, which are fastened at wall and penetrate shingles arranged at inner side of wall |
| CN204084460U (en) * | 2014-07-08 | 2015-01-07 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of gas-turbine combustion chamber head distribution cooling structure |
| US20160209035A1 (en) * | 2015-01-16 | 2016-07-21 | Solar Turbines Incorporated | Combustion hole insert with integrated film restarter |
| CN206572548U (en) * | 2017-02-28 | 2017-10-20 | 郝羿飞 | A kind of cooling structure air inlet bucket |
-
2021
- 2021-11-30 CN CN202111444432.8A patent/CN114484497A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5235805A (en) * | 1991-03-20 | 1993-08-17 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." | Gas turbine engine combustion chamber with oxidizer intake flow control |
| GB2353589A (en) * | 1999-08-24 | 2001-02-28 | Rolls Royce Plc | Combustor wall arrangement with air intake port |
| DE102012015452A1 (en) * | 2012-08-03 | 2014-04-24 | Rolls-Royce Deutschland Ltd & Co Kg | Gas turbine combustion chamber wall for gas turbine engine, has mixed air openings formed by tubular air guide elements, which are fastened at wall and penetrate shingles arranged at inner side of wall |
| CN204084460U (en) * | 2014-07-08 | 2015-01-07 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of gas-turbine combustion chamber head distribution cooling structure |
| US20160209035A1 (en) * | 2015-01-16 | 2016-07-21 | Solar Turbines Incorporated | Combustion hole insert with integrated film restarter |
| CN206572548U (en) * | 2017-02-28 | 2017-10-20 | 郝羿飞 | A kind of cooling structure air inlet bucket |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115978588A (en) * | 2023-01-29 | 2023-04-18 | 中国航发沈阳发动机研究所 | Mixing funnel for flame tube of combustion chamber |
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Application publication date: 20220513 |
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