CN116221777A - Combustion chamber head structure with adjustable runner - Google Patents
Combustion chamber head structure with adjustable runner Download PDFInfo
- Publication number
- CN116221777A CN116221777A CN202310138214.4A CN202310138214A CN116221777A CN 116221777 A CN116221777 A CN 116221777A CN 202310138214 A CN202310138214 A CN 202310138214A CN 116221777 A CN116221777 A CN 116221777A
- Authority
- CN
- China
- Prior art keywords
- fuel
- channel
- head structure
- combustion chamber
- fuel oil
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 36
- 239000000446 fuel Substances 0.000 claims abstract description 94
- 239000000295 fuel oil Substances 0.000 claims abstract description 24
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000006641 stabilisation Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 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
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
-
- 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
- F23R3/16—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The invention provides a combustion chamber head structure with an adjustable flow channel, which comprises: the fuel channel is provided with a fuel inlet and a mounting flange in sequence from outside to inside and is positioned at a branch part of the main body; the fuel oil retaining chamber is positioned at the intersection position of the branch and the main body; the precession screw rod sequentially penetrates through the thread sealing hole and the fuel oil retaining cavity to be connected with the fuel oil filter screen; the fuel filter screen is sequentially connected with the fuel stabilizing cavity and the conical mounting seat of the fuel atomizer; and the positioning thread is positioned between the outer wall surface of the fuel stabilizing cavity and the fuel passage shell. The air channel is sequentially provided with a spiral vane cyclone from inside to outside, is positioned at the outer side of the fuel stabilizing cavity and is coaxially nested with the fuel channel main body; the venturi is positioned outside the cyclone and is coaxially nested with the cyclone. The invention can actively regulate and control the head structure of the combustion chamber in real time, optimize the local aerodynamic state and the oil-gas mixing quality, and achieve the purpose of stabilizing the combustion field.
Description
Technical Field
The invention relates to the technical field of industrial gas turbines, in particular to a combustion chamber head structure with an adjustable flow channel, which can be applied to low-emission gas turbine combustion chamber experiments in the fields of various ships, power generation and the like.
Background
With the wide application of gas turbines in the aspects of ship power, industrial power generation, oil-gas gentlecloud and the like, the larger pollutant discharge amount of the gas turbines gradually becomes an obstacle for environmental protection. The international society has promulgated increasingly stringent pollutant emission regulations for its emissions problems, with control of nitrogen oxide emissions also becoming an issue of current scientific focus. Localized hot spots at high temperatures within the combustion chamber are a major cause of nitrogen oxide formation.
Disclosure of Invention
The invention aims to actively regulate and control the combustion chamber head structure in real time, optimize the local aerodynamic state and the oil-gas mixing quality, and achieve the purpose of stabilizing a combustion field.
The purpose of the invention is realized in the following way: comprising the following steps: the fuel channel is provided with a fuel inlet and a mounting flange in sequence from outside to inside and is positioned at a branch part of the main body; the fuel oil retaining chamber is positioned at the intersection position of the branch and the main body; the precession screw rod sequentially penetrates through the thread sealing hole and the fuel oil retaining cavity to be connected with the fuel oil filter screen; the fuel filter screen is sequentially connected with the fuel stabilizing cavity and the conical mounting seat of the fuel atomizer; and the positioning thread is positioned between the outer wall surface of the fuel stabilizing cavity and the fuel passage shell. The air channel is sequentially provided with a spiral vane cyclone from inside to outside, is positioned at the outer side of the fuel stabilizing cavity and is coaxially nested with the fuel channel main body; the venturi is positioned outside the cyclone and is coaxially nested with the cyclone.
Further, the precession screw rod sequentially penetrates through the thread sealing hole and the fuel oil retaining cavity to be connected with the fuel oil filter screen and is used for adjusting the relative matching position of the fuel oil channel structure, and the thread pitch of the precession screw rod is equal to the thread pitch of the positioning thread by 1-2 mm. Positioning protrusions are needed to be arranged at two ends of the screw thread of the precession screw, so that excessive adjustment of the head structure is prevented.
Further, the positioning thread is positioned between the outer wall surface of the fuel stabilizing cavity and the fuel passage shell, and the follow-up screw synchronously rotates with the same lead. The outer wall surface of the fuel stabilizing cavity is slightly longer than the screw thread of the fuel passage outer shell.
Further, the conical mounting seat of the fuel atomizer is positioned at the downstream of the fuel stabilizing cavity and is used for being in threaded connection with the fuel atomizer, and the fuel injection point and the venturi throat air flow area are controlled by adjusting the relative position with the venturi. The outer surface of the conical mounting seat of the fuel atomizer is a conical surface, the included angle between the conical mounting seat and the central axis is 15-25 degrees, and the maximum diameter of the conical surface and the diameter of the throat of the venturi tube are smaller than 0.5.
Further, the spiral vane swirler and the venturi are nested outside the fuel channel from inside to outside in sequence, and the spiral vane swirler and the venturi are coaxially nested and installed through the locating pin hole.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a head design scheme with an adjustable flow passage, which can effectively optimize the fuel crushing process and the mixing quality of fuel and air, create stable combustion conditions and achieve uniform local combustion heat intensity.
The invention can actively regulate and control the head structure of the combustion chamber in real time, optimize the local aerodynamic state and the oil-gas mixing quality, and achieve the purpose of stabilizing the combustion field.
Drawings
FIG. 1 is an isometric view of a combustion chamber head structure.
FIG. 2 is a right side view of a combustion chamber head structure.
FIG. 3 is a front cross-sectional view of a combustion chamber head structure according to an embodiment of the present invention.
In the figure: 100 fuel channels, 101 fuel inlets, 102 fuel retention chambers, 103 precession screws, 104 thread seal holes, 105 fuel screens, 106 positioning threads, 107 fuel stabilization chambers, 108 fuel atomizer cone mounts, 200 air channels, 201 helical vane swirlers, 202 venturi.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The invention discloses a combustion chamber head structure with an adjustable flow passage, which is formed by flexibly adjusting and matching a fuel passage and an air passage.
For the purpose of promoting an understanding of the principles and advantages of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same.
In an embodiment of the present invention, there is provided a combustion chamber head structure with an adjustable flow channel, as shown in fig. 3, the combustion chamber head structure with an adjustable flow channel includes:
the fuel oil channel comprises the following components from outside to inside in sequence:
the fuel inlet and the mounting flange are positioned at the branch part of the main body and are used for mounting and accessing fuel required by the combustion chamber;
the fuel oil retaining chamber is positioned at the intersection position of the branch and the main body and is used for excessively storing a small part of fuel oil;
the precession screw rod and the thread sealing hole are positioned at the end of the fuel oil path away from the combustion chamber and are used for adjusting the relative matching position of the fuel oil channel structure;
the fuel filter screen is positioned at the downstream outlet position of the fuel retention chamber, is connected with the precession screw and is used for filtering impurities in the fuel;
a fuel stabilization chamber located downstream of the fuel filter screen for attenuating atomization fluctuations due to fuel transport instability;
the conical mounting seat of the fuel atomizer is positioned at the downstream of the fuel stabilizing cavity at the tail end of the fuel channel, the inner wall surface is threaded and can be connected with the fuel atomizer, the outer surface is a conical curved surface, and the air flow area is regulated by changing the relative position of the conical curved surface and the venturi.
An air passage nested with the fuel passage outer wall, comprising:
a spiral vane swirler positioned outside the fuel stabilization cavity;
and the venturi is nested outside the cyclone.
The fuel inlet 101 is connected to a fuel retaining chamber 102. Fuel enters the fuel passage from the fuel inlet 101 to the fuel stagnation chamber 102.
The fuel filter 105 is located downstream of the fuel retention chamber 102, and the fuel is filtered into the fuel stabilization chamber 107, and after the air is discharged, the fuel is stably injected through the fuel atomizer mounted to the mount 108.
The precession screw 103 is connected with the fuel filter screen 105 of the fuel retaining chamber 102 through the thread sealing hole 104 in sequence. The precession screw 103 has positioning protrusions at both ends of the thread sealing hole 104 to prevent excessive structural adjustment. The length of the thread seal bore 104 should be greater than the diameter of the fuel retaining chamber to facilitate reducing vibration of the precession screw 103 during operation.
The positioning thread 106 is positioned between the outer wall surface of the fuel stabilization cavity and the fuel passage housing and has the same pitch as the precession screw 103.
The spiral vane swirler 201 is an axial flow swirler nested on the outer wall of the fuel channel, a limit bulge is arranged on the outer wall of the fuel channel, the swirler is convenient to install and position, and a limit pin hole is connected to the outer edge of the fuel channel.
The venturi 202 is nested outside the cyclone 201, the front end is contracted, and the rear end is expanded, so that the purposes of promoting fuel atomization and mixing with air are achieved by changing the air flow area. Tail of tail
After the liquid fuel is sprayed from the spray nozzle, the liquid fuel can be mixed with rotational flow air generated at the outlet end of the spiral vane swirler 201 in the venturi 202, so that the mixing effect is enhanced, and the combustion is stabilized.
The invention relates to a combustion chamber head structure with an adjustable flow channel, which can realize stable and efficient combustion of a combustion chamber of a gas turbine, and the working principle is as follows:
when the combustion chamber head structure with the adjustable flow channel works, the relative position of the conical mounting seat and the air channel structure is changed by adjusting the precession screw rod, so that the throat flow area of the head air channel is changed. The fuel is conveyed through the fuel channel, enters the fuel detention cavity through the fuel channel inlet channel, enters the fuel stabilization cavity through the fuel filter screen, is sprayed to the air flow channel area through the fuel atomizer under the action of pressure after being exhausted, and the swirl air generated at the outlet end of the spiral vane swirler quickly breaks the fuel for the second time and is quickly mixed with the fuel to form a uniform reaction mixture, so that a combustion field with uniform local heat release intensity is gradually achieved after the combustion field is ignited.
The optimum head structure matching mode favorable for the combustion field organization can be obtained by adjusting the precession screw rod in the combustion process.
Claims (5)
1. A combustion chamber head structure with adjustable runner, its characterized in that: the fuel oil channel sequentially comprises a fuel oil inlet and a mounting flange which are positioned at a branch part of a main body, a fuel oil retaining cavity which is positioned at the intersection position of the branch and the main body, a precession screw rod, a thread sealing hole, and positioning threads which are positioned between the outer wall surface of a fuel oil stabilizing cavity and a fuel oil channel shell, wherein the precession screw rod sequentially penetrates through the thread sealing hole, the fuel oil retaining cavity is connected with a fuel oil filter screen, and the fuel oil filter screen is sequentially connected with a fuel oil stabilizing cavity and a conical mounting seat of a fuel oil atomizer; the air channel is sequentially provided with a spiral vane cyclone and a venturi tube from inside to outside, and the spiral vane cyclone is positioned at the outer side of the fuel stabilizing cavity and is coaxially nested with the fuel channel main body; the venturi is positioned outside the cyclone and is coaxially nested with the cyclone.
2. The flow channel adjustable combustion chamber head structure as set forth in claim 1, wherein: the precession screw is used for adjusting the relative matching position of the fuel channel structure, the thread pitch of the precession screw is equal to the thread pitch of the positioning thread, positioning protrusions are needed to be arranged at two ends of the thread of the precession screw, and excessive adjustment of the head structure is prevented.
3. The flow channel adjustable combustion chamber head structure as set forth in claim 1, wherein: the positioning screw thread follows the screw rod to synchronously rotate in the same lead, and the outer wall surface of the fuel stabilizing cavity is slightly longer than the screw thread of the fuel channel shell.
4. The flow channel adjustable combustion chamber head structure as set forth in claim 1, wherein: the conical mounting seat of the fuel atomizer is positioned at the downstream of the fuel stabilizing cavity and is used for being in threaded connection with the fuel atomizer, the fuel injection point and the air flow area of the venturi throat are controlled by adjusting the relative position between the conical mounting seat and the venturi, the outer surface of the conical mounting seat of the fuel atomizer is a conical surface, the included angle between the conical surface and the central axis is 15-25 degrees, and the maximum diameter of the conical surface and the diameter of the venturi throat are smaller than 0.5.
5. The flow channel adjustable combustion chamber head structure as set forth in claim 1, wherein: the spiral vane cyclone and the venturi are nested outside the fuel channel from inside to outside in sequence, and the spiral vane cyclone and the venturi are coaxially nested and installed through the positioning pin hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310138214.4A CN116221777A (en) | 2023-02-20 | 2023-02-20 | Combustion chamber head structure with adjustable runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310138214.4A CN116221777A (en) | 2023-02-20 | 2023-02-20 | Combustion chamber head structure with adjustable runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116221777A true CN116221777A (en) | 2023-06-06 |
Family
ID=86570910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310138214.4A Pending CN116221777A (en) | 2023-02-20 | 2023-02-20 | Combustion chamber head structure with adjustable runner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116221777A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2042807A1 (en) * | 2007-09-25 | 2009-04-01 | Siemens Aktiengesellschaft | Pre-mix stage for a gas turbine burner |
| CN202032612U (en) * | 2010-12-31 | 2011-11-09 | 中国燃气涡轮研究院 | Partial premixing and pre-evaporating combustion chamber |
| CN106438108A (en) * | 2016-08-26 | 2017-02-22 | 南京理工大学 | Large-regulation-ratio type fuel gas flow regulation device for solid rocket ramjet |
| CN111981512A (en) * | 2020-07-31 | 2020-11-24 | 中国航发贵阳发动机设计研究所 | Fuel air atomization device |
| CN113090415A (en) * | 2021-04-13 | 2021-07-09 | 西北工业大学 | Variable flow solid-liquid mixing engine |
| CN114046536A (en) * | 2021-11-01 | 2022-02-15 | 中国科学院力学研究所 | Gas atomizing nozzle with adjustable annular spray hole and gas atomizing adjusting method |
-
2023
- 2023-02-20 CN CN202310138214.4A patent/CN116221777A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2042807A1 (en) * | 2007-09-25 | 2009-04-01 | Siemens Aktiengesellschaft | Pre-mix stage for a gas turbine burner |
| CN202032612U (en) * | 2010-12-31 | 2011-11-09 | 中国燃气涡轮研究院 | Partial premixing and pre-evaporating combustion chamber |
| CN106438108A (en) * | 2016-08-26 | 2017-02-22 | 南京理工大学 | Large-regulation-ratio type fuel gas flow regulation device for solid rocket ramjet |
| CN111981512A (en) * | 2020-07-31 | 2020-11-24 | 中国航发贵阳发动机设计研究所 | Fuel air atomization device |
| CN113090415A (en) * | 2021-04-13 | 2021-07-09 | 西北工业大学 | Variable flow solid-liquid mixing engine |
| CN114046536A (en) * | 2021-11-01 | 2022-02-15 | 中国科学院力学研究所 | Gas atomizing nozzle with adjustable annular spray hole and gas atomizing adjusting method |
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