CN111520758A - Fuel preheating wall surface cooling integrated flame cylinder wall structure - Google Patents
Fuel preheating wall surface cooling integrated flame cylinder wall structure Download PDFInfo
- Publication number
- CN111520758A CN111520758A CN202010185548.3A CN202010185548A CN111520758A CN 111520758 A CN111520758 A CN 111520758A CN 202010185548 A CN202010185548 A CN 202010185548A CN 111520758 A CN111520758 A CN 111520758A
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- Prior art keywords
- flame tube
- fuel oil
- cooling
- wall
- tube wall
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- 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
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spray-Type Burners (AREA)
Abstract
The invention provides a fuel preheating wall surface cooling integrated flame cylinder wall structure, which comprises: the flame tube wall, the cooling aperture, the U-shaped fuel oil channel, nozzle opening. The flame tube wall is provided with a small cooling hole which penetrates through the flame tube wall in an inclined mode, a U-shaped fuel oil channel is arranged inside the flame tube wall, fuel oil flows to the rear portion of the flame tube from the front portion of the flame tube through the channel and then returns to the front portion of the flame tube, and the fuel oil is sprayed into the flame tube from an oil spraying hole at the tail end of the fuel oil channel to participate in combustion. Through the mode that sets up cooling hole and fuel oil passageway at the flame tube wall, under the prerequisite that the cooling hole on guaranteeing the flame tube wall can form high-quality cooling air film, through the convection heat transfer between fuel and the flame tube wall, further strengthen the cooling efficiency of flame tube wall, this scheme can reduce the flame tube quality, and the fuel can also improve combustion efficiency through preheating, reduces the pollutant emission.
Description
Technical Field
The invention belongs to the field of gas turbine engines, and particularly relates to a flame tube wall structure integrating fuel preheating and wall cooling.
Background
The gas temperature of the main combustion zone of the combustion chamber can reach 2400K, which is the highest temperature zone of the gas turbine, and the normal working temperature of the metal material of the wall of the flame tube at present does not exceed 1300K, and the material cannot work for a long time in a severe environment far exceeding the normal working temperature, so that the flame tube of the combustion chamber must be cooled to prevent the flame tube from being burnt out to reduce the service life of the combustion chamber, and further reduce the service life of an engine. Thus, air not used for combustion, approximately 60% of the total air flow, is gradually introduced into the liner. Approximately one third of this air is used to reduce the temperature of the combustion gases in the dilution zone before they enter the turbine, while the remainder of the air is used to cool the walls of the liner. This is achieved by a thin layer of cooling air flowing along the inner surface of the liner wall, separating the liner wall from the hot combustion gases.
As turbine engine performance increases, the pressure ratio and combustor temperature rise of the engine also gradually increase, which subjects the liner walls to greater thermal loads. The combustion air amount increases while the intake air amount does not change, so the cooling air amount can only be decreased. The thermal load on the wall surface of the flame tube is increased, so that a more advanced cooling mode needs to be adopted, and a better cooling effect is achieved by using less cold air. The traditional flame tube wall generally adopts cooling modes such as divergent cooling, air film cooling, impact air film cooling and the like, the structure is also a single-layer wall structure, and the basic principle is that cold air enters the flame tube from inner and outer annular cavities of a combustion chamber through various apertures and forms an air film on the inner wall of the flame tube so as to play a role in cooling. The traditional cooling structure has low overall cooling efficiency and cannot well adapt to the current situation that the heat load of the turbine engine is increased and the cold air quantity is reduced. In recent years, the micro-hole cooling technology has become an important development direction of the cooling technology of the hot-end part of the advanced turbine engine, wherein the composite cooling mode adopting a plurality of micro-hole cooling modes at the same time has the advantages of small pressure loss, high cooling efficiency and the like through foreign tests, and has great application value.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flame tube wall structure integrating fuel preheating and wall cooling, and compared with the prior art, the scheme has the advantages that by arranging the small cooling holes and the fuel channel on the wall surface of the flame tube, on the premise of ensuring that the small cooling holes on the wall surface of the flame tube can form a high-quality cooling air film, the cooling efficiency of the wall surface of the flame tube is further enhanced through convection heat exchange between fuel and the wall surface of the flame tube, and the effect of reducing the quality of the flame tube is also achieved.
Technical scheme
The invention aims to provide a flame tube wall structure with an integrated fuel preheating wall surface and cooling function.
The technical scheme of the invention is as follows:
the utility model provides a integrative flame section of thick bamboo wall structure of wall cooling is preheated to fuel, includes: the flame tube wall, the cooling aperture, the U-shaped fuel oil channel, nozzle opening. The method is characterized in that: the flame tube wall is provided with a small cooling hole which penetrates through the flame tube wall in an inclined mode, a U-shaped fuel oil channel is arranged inside the flame tube wall, fuel oil flows to the rear portion of the flame tube from the front portion of the flame tube through the channel and then returns to the front portion of the flame tube, and the fuel oil is sprayed into the flame tube through an oil spraying hole at the tail end of the fuel oil channel to participate in combustion.
The fuel preheating wall surface cooling integrated flame cylinder wall structure is characterized in that: the small cooling holes on the wall surface of the flame tube are inclined holes, the included angle between the axis of each small cooling hole and the wall surface of the flame tube is 30-60 degrees, the diameter of each small cooling hole is 1-2.5mm, and the arrangement mode of the small cooling holes can be selected to be arranged in sequence or in a differential sequence.
The fuel preheating wall surface cooling integrated flame cylinder wall structure is characterized in that: the cross section of the U-shaped fuel oil channel is circular, the diameter of the U-shaped fuel oil channel is 1/3-1/2 of the thickness of the flame tube, the direction of the U-shaped fuel oil channel is the same as the direction of the flame tube inlet at first and then is opposite, the U-shaped fuel oil channel is in a backflow state, and 6-12U-shaped fuel oil channels can be uniformly distributed around the axis of the flame tube along the circumferential direction of the flame tube.
The fuel preheating wall surface cooling integrated flame cylinder wall structure is characterized in that: the oil spray holes are positioned at the tail ends of the U-shaped fuel oil channels, the diameter of each oil spray hole is the same as the diameter of the section of each U-shaped fuel oil channel, one oil spray hole is matched with one U-shaped fuel oil channel, and the oil spray direction of each oil spray hole is perpendicular to the axial direction of the flame tube.
The invention has the following beneficial effects:
according to the flame tube wall structure integrating fuel preheating and wall cooling, the cooling efficiency of the flame tube wall is further enhanced by convection heat exchange between the fuel and the flame tube wall in the mode that the cooling small holes and the fuel channel are formed in the flame tube wall on the premise that the cooling small holes in the flame tube wall can form a high-quality cooling air film.
Drawings
FIG. 1: fuel preheating wall surface cooling integrated flame cylinder wall flat plate structure schematic diagram
FIG. 2: fuel preheating wall surface cooling integrated flame cylinder wall flat plate structure sectional view
In the figure: 1-flame tube wall, 2-U-shaped fuel channel, 3-cooling small hole, 4-oil spray hole
Detailed Description
The invention will now be further described with reference to the accompanying drawings in which:
with reference to fig. 1 and 2, the invention provides a flame tube wall structure with an integrated fuel preheating wall surface and cooling function. Fig. 1 is a schematic view of a structure of a flame tube wall flat plate integrated with fuel preheating wall cooling, and fig. 2 is a sectional view of the structure of the flame tube wall flat plate integrated with fuel preheating wall cooling.
As shown in figure 2, cooling air enters the flame tube through the cooling small holes (3), a cooling air film is formed on the inner wall surface of the flame tube under the action of high-speed airflow, the cooling air can be easily formed into a high-quality cooling air film through the inclined cooling small holes (3), fuel oil flows from the front section to the rear section of the flame tube and returns to the front section of the flame tube after entering the U-shaped fuel oil channel (2), the wall surface of the flame tube is cooled through the convection heat exchange effect in the process, the fuel oil is preheated simultaneously, and then the fuel oil is sprayed into the flame tube from the oil spraying holes (4) at the tail end of the U-shaped fuel oil channel (2) to participate in combustion.
Claims (4)
1. The utility model provides a integrative flame section of thick bamboo wall structure of wall cooling is preheated to fuel, includes: flame tube wall, cooling aperture, U-shaped fuel oil passageway, nozzle, its characterized in that: the flame tube wall is provided with a small cooling hole which penetrates through the flame tube wall in an inclined mode, a U-shaped fuel oil channel is arranged inside the flame tube wall, fuel oil flows to the rear portion of the flame tube from the front portion of the flame tube through the channel and then returns to the front portion of the flame tube, and the fuel oil is sprayed into the flame tube through an oil spraying hole at the tail end of the fuel oil channel to participate in combustion.
2. A fuel preheated wall cooling integrated flame tube wall structure as claimed in claim 1, wherein: the small cooling holes on the wall surface of the flame tube are inclined holes, the included angle between the axis of each small cooling hole and the wall surface of the flame tube is 30-60 degrees, the diameter of each small cooling hole is 1-2.5mm, and the arrangement mode of the small cooling holes can be selected to be arranged in sequence or in a differential sequence.
3. A fuel preheated wall cooling integrated flame tube wall structure as claimed in claim 1, wherein: the cross section of the U-shaped fuel oil channel is circular, the diameter of the U-shaped fuel oil channel is 1/3-1/2 of the thickness of the flame tube, the direction of the U-shaped fuel oil channel is the same as the direction of the flame tube inlet at first and then is opposite, the U-shaped fuel oil channel is in a backflow state, and 6-12U-shaped fuel oil channels can be uniformly distributed around the axis of the flame tube along the circumferential direction of the flame tube.
4. A fuel preheated wall cooling integrated flame tube wall structure as claimed in claim 1, wherein: the oil spray holes are positioned at the tail ends of the U-shaped fuel oil channels, the diameter of each oil spray hole is the same as the diameter of the section of each U-shaped fuel oil channel, one oil spray hole is matched with one U-shaped fuel oil channel, and the oil spray direction of each oil spray hole is perpendicular to the axial direction of the flame tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010185548.3A CN111520758A (en) | 2020-03-17 | 2020-03-17 | Fuel preheating wall surface cooling integrated flame cylinder wall structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010185548.3A CN111520758A (en) | 2020-03-17 | 2020-03-17 | Fuel preheating wall surface cooling integrated flame cylinder wall structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111520758A true CN111520758A (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010185548.3A Pending CN111520758A (en) | 2020-03-17 | 2020-03-17 | Fuel preheating wall surface cooling integrated flame cylinder wall structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN111520758A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902227A (en) * | 2021-03-04 | 2021-06-04 | 西北工业大学 | Multi-channel evaporating pipe of combustion chamber of micro engine |
| CN113464283A (en) * | 2021-08-10 | 2021-10-01 | 南京航空航天大学 | Compound initiative cooling structure of rotatory detonation engine and rotatory detonation engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202419701U (en) * | 2011-12-28 | 2012-09-05 | 中航商用航空发动机有限责任公司 | Flame tube wall plate with multiple inclined holes, flame tube and gas turbine combustion chamber |
| CN104791848A (en) * | 2014-11-25 | 2015-07-22 | 西北工业大学 | Combustion chamber flame cylinder wall face with blade grid channel multi-inclined-hole cooling manner adopted |
| DE112017001100T5 (en) * | 2016-03-03 | 2018-12-06 | Mitsubishi Hitachi Power Systems, Ltd. | ACOUSTIC DEVICE AND GUESTURBINE |
| CN109595592A (en) * | 2018-12-06 | 2019-04-09 | 西北工业大学 | A kind of prevapourising formula burner inner liner |
| KR20190068175A (en) * | 2017-12-08 | 2019-06-18 | 두산중공업 주식회사 | Burner Having Sealing Member With Slot Hole Structure, And Gas Turbine Having The Same |
-
2020
- 2020-03-17 CN CN202010185548.3A patent/CN111520758A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202419701U (en) * | 2011-12-28 | 2012-09-05 | 中航商用航空发动机有限责任公司 | Flame tube wall plate with multiple inclined holes, flame tube and gas turbine combustion chamber |
| CN104791848A (en) * | 2014-11-25 | 2015-07-22 | 西北工业大学 | Combustion chamber flame cylinder wall face with blade grid channel multi-inclined-hole cooling manner adopted |
| DE112017001100T5 (en) * | 2016-03-03 | 2018-12-06 | Mitsubishi Hitachi Power Systems, Ltd. | ACOUSTIC DEVICE AND GUESTURBINE |
| KR20190068175A (en) * | 2017-12-08 | 2019-06-18 | 두산중공업 주식회사 | Burner Having Sealing Member With Slot Hole Structure, And Gas Turbine Having The Same |
| CN109595592A (en) * | 2018-12-06 | 2019-04-09 | 西北工业大学 | A kind of prevapourising formula burner inner liner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902227A (en) * | 2021-03-04 | 2021-06-04 | 西北工业大学 | Multi-channel evaporating pipe of combustion chamber of micro engine |
| CN113464283A (en) * | 2021-08-10 | 2021-10-01 | 南京航空航天大学 | Compound initiative cooling structure of rotatory detonation engine and rotatory detonation engine |
| CN113464283B (en) * | 2021-08-10 | 2022-10-21 | 南京航空航天大学 | Compound initiative cooling structure of rotatory detonation engine and rotatory detonation engine |
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Application publication date: 20200811 |