CN109519284A - A kind of combustion chamber heat screen - Google Patents
A kind of combustion chamber heat screen Download PDFInfo
- Publication number
- CN109519284A CN109519284A CN201811518995.5A CN201811518995A CN109519284A CN 109519284 A CN109519284 A CN 109519284A CN 201811518995 A CN201811518995 A CN 201811518995A CN 109519284 A CN109519284 A CN 109519284A
- Authority
- CN
- China
- Prior art keywords
- heat screen
- combustion chamber
- cylinder
- supporting element
- screen cylinder
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/24—Heat or noise insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/16—Cooling of plants characterised by cooling medium
- F02C7/18—Cooling of plants characterised by cooling medium the medium being gaseous, e.g. air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
- F02K7/10—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof characterised by having ram-action compression, i.e. aero-thermo-dynamic-ducts or ram-jet engines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention discloses a kind of combustion chamber heat screen, which includes heat screen cylinder and Ω supporting element；Heat screen cylinder is that corrugated shape turns Circular Thin structure, and heat screen cross section is gradually smoothly transitted from front to back by corrugated as circle, keeps the cooling duct area between heat screen and combustor outer casing constant in transient process；Air film hole, adjacent air film hole interlaced arrangement are opened on heat screen cylinder；It is connected between heat screen cylinder and Ω supporting element by spot-welded mode；Ω supporting element plays a supportive role between heat screen cylinder and combustion chamber cylinder, and heat screen cylinder is made to be maintained correct geometry and good cooling performance.The present invention can be improved the uniformity of combustor exit cooling air distribution, effectively improves the working environment of jet pipe, improves engine operation reliability.
Description
Technical field
The present invention relates to technical field of engines, in particular to the combustion chamber heat screen design structure of a kind of engine.
Background technique
Engine generallys use heat screen air film cooling technology and implements thermal protection to combustion chamber, and heat screen mostly uses greatly at present
Circumferential ripple struction, to improve the problem on deformation of heat screen self structure.But circumferential ripple heat screen is special because of its intrinsic structure
Point makes cooling duct exit flow be in periodical non-uniform Distribution, brings adverse effect to the cooling of jet pipe.
As shown in Figure 1, engine chamber heat screen is generally made of heat screen cylinder and Ω supporting element.Heat screen cylinder
It using circumferential ripple struction, is opened on heat screen cylinder in air film hole (or gap), adjacent air film hole interlaced arrangement.As shown in Fig. 2,
Minor details heat screen is concentrically mounted on combustion chamber, and the rear of minor details heat screen is combustion chamber jet pipe, minor details heat screen and burning
Cooling air channel is formed between the cylinder of room, combustion chamber cylinder is kept apart with high-temperature fuel gas, to realize to combustion chamber cylinder
The function of cooling protection.
Meanwhile cooling air is flowed out by heat screen aperture or gap, forms air film in heat screen inner surface.Air film can rise simultaneously
Two kinds of effects directly can carry out convection current to wall surface to avoid high-temperature fuel gas and change first is that high-temperature fuel gas and heat screen wall surface are separated
Heat plays heat-blocking action；Second is that heat screen cylinder is taken away a part, as cooling effect from the heat that high-temperature fuel gas receives.
To realize the function to heat screen cylinder cooling protection.
In punching engine work, because combustion chamber cooling duct exit flow is in periodical non-uniform Distribution, tail is caused
Jet pipe cooling air is unevenly distributed, so that there are biggish temperature gradients for jet pipe adjustment sheet, is started for what is worked long hours
For machine, the reliability that jet pipe adjusts component safety work may be will affect.
Summary of the invention
The present invention provides a kind of combustion chamber heat screen, heat screen turns circular design structure using corrugated shape, can be improved
The uniformity of combustor exit cooling air distribution, effectively improves the working environment of jet pipe, and improving punching engine work can
By property.
A kind of combustion chamber heat screen, the heat screen include heat screen cylinder and Ω supporting element；
Heat screen cylinder is that corrugated shape turns Circular Thin structure, and heat screen cross section is from front to back gradually by corrugated light
It slips over and crosses as circle, keep the cooling duct area between heat screen and combustor outer casing constant in transient process；Heat screen cylinder
Air film hole, adjacent air film hole interlaced arrangement are opened on body；
It is connected between the heat screen cylinder and Ω supporting element by spot-welded mode；The Ω supporting element is in heat screen
It plays a supportive role between cylinder and combustion chamber cylinder, heat screen cylinder is made to be maintained correct geometry and good cooling
Performance.
Further, oblong screw hole is opened on the Ω supporting element；Heat shield assembly passes through Ω supporting element upper bolt aperture
It is fixed on combustion chamber inner barrel.
Beneficial effect
The present invention has adapted to the requirement of combustion chamber minor details heat screen design structure, and heat screen is designed as corrugated shape and turns circle
Shape can be improved the uniformity of combustor exit cooling air distribution, effectively improve the working environment of jet pipe, can to engine is improved
There is valuable help by property.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of traditional heat screen described in background technology；
Fig. 2 is the installation site and cooling principle schematic diagram of heat screen；
Fig. 3 is overall structure of the present invention；
Fig. 4 is heat screen entrance ripple shape and structure schematic diagram；
Fig. 5 is heat screen entrance corrugated shape partial enlargement diagram；
Fig. 6 is that heat screen exports circular shape structural schematic diagram；
Fig. 7 is heat screen film hole structure schematic diagram；
Fig. 8 is Ω supporting piece structure schematic diagram
Wherein: 1- heat screen cylinder, 2- Ω supporting element.
Specific embodiment
As shown in figure 3, it includes: heat screen cylinder 1 and Ω supporting element the present invention provides a kind of combustion chamber heat screen
2；
Heat screen cylinder 1 is that corrugated shape turns Circular Thin structure, and heat screen cross section is from front to back gradually by corrugated
Circle is faded to, in progressive formation, it is desirable that smoothly transit, while keeping the cooling duct between heat screen and combustor outer casing
Area is constant.Attached drawing 4 and attached drawing 5 are heat screen entrance ripple shape and structure schematic diagrames, and attached drawing 6 is heat screen outlet circular shape
Schematic diagram.Air film hole is opened on heat screen cylinder 1, adjacent air film hole interlaced arrangement is 8mm, phase with the air film pitch of holes in a line
The air film hole of adjacent a line is staggered distance as 4mm, and the line space of air film hole is 5mm；As shown in Fig. 6.
Referring to attached drawing 8, Ω supporting element 2 is in Ω shape, is played a supportive role between heat screen cylinder 1 and combustion chamber cylinder,
Heat screen cylinder 1 is set to be maintained correct geometry and good cooling performance；Heat screen cylinder 1 and Ω supporting element 2 it
Between connected by spot-welded mode.
Cooling air channel is formed between heat screen cylinder 1 and combustion chamber cylinder, and combustion chamber cylinder is isolated with high-temperature fuel gas
It comes, to realize the function to combustion chamber cylinder cooling protection；Meanwhile cooling air is flowed out by heat screen aperture or gap,
1 inner surface of heat screen cylinder forms air film.Air film can play two kinds simultaneously, first is that by high-temperature fuel gas and heat screen wall surface every
It opens, heat convection directly can be carried out to wall surface to avoid high-temperature fuel gas, that is, play heat-blocking action；Second is that heat-insulated screen-wall is fired from high temperature
The heat that gas receives takes away a part, as cooling effect.To realize the function to 1 cooling protection of heat screen cylinder.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (2)
1. a kind of combustion chamber heat screen, which includes heat screen cylinder and Ω supporting element；It is characterized in that, heat screen cylinder
Turn Circular Thin structure for corrugated shape, heat screen cross section is gradually smoothly transitted from front to back by corrugated as circle, transition
Keep the cooling duct area between heat screen and combustor outer casing constant in the process；Air film hole is opened on heat screen cylinder, it is adjacent
Air film hole interlaced arrangement；
It is connected between the heat screen cylinder and Ω supporting element by spot-welded mode；The Ω supporting element is in heat screen cylinder
It plays a supportive role between the cylinder of combustion chamber.
2. combustion chamber heat screen according to claim 1, which is characterized in that open oblong screw on the Ω supporting element
Hole；Heat shield assembly is fixed on combustion chamber inner barrel by Ω supporting element upper bolt aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518995.5A CN109519284A (en) | 2018-12-12 | 2018-12-12 | A kind of combustion chamber heat screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518995.5A CN109519284A (en) | 2018-12-12 | 2018-12-12 | A kind of combustion chamber heat screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109519284A true CN109519284A (en) | 2019-03-26 |
Family
ID=65796509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811518995.5A Pending CN109519284A (en) | 2018-12-12 | 2018-12-12 | A kind of combustion chamber heat screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109519284A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906365A (en) * | 2019-10-30 | 2020-03-24 | 北京动力机械研究所 | Light and uniformly cooled longitudinal corrugated heat shield |
| CN112178693A (en) * | 2020-10-27 | 2021-01-05 | 西北工业大学 | Offset hole row and cylindrical hole row combined cooling structure for corrugated heat shield |
| CN113217949A (en) * | 2021-05-20 | 2021-08-06 | 西安航天动力研究所 | Combustion chamber diverging and cooling structure and ramjet combustion chamber |
| CN116379469A (en) * | 2023-05-15 | 2023-07-04 | 哈尔滨工程大学 | Heat-insulating rectifying structure of combustion chamber in rotary forming surface form |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384846A (en) * | 2014-10-08 | 2015-03-04 | 贵州黎阳航空动力有限公司 | Method for forming large corrugated heat insulation screen |
| CN104654362A (en) * | 2015-02-13 | 2015-05-27 | 中国人民解放军国防科学技术大学 | Large-scale hyshot scramjet engine and three-dimensional petal-shaped section combustor |
| CN104896514A (en) * | 2015-05-13 | 2015-09-09 | 广东电网有限责任公司电力科学研究院 | Anti-vibration heat insulation wall of main combustion chamber of gas turbine |
| CN105135470A (en) * | 2015-09-17 | 2015-12-09 | 中国航空工业集团公司沈阳发动机设计研究所 | Method for designing heat shield and heat shield |
| CN105180204A (en) * | 2015-09-17 | 2015-12-23 | 中国航空工业集团公司沈阳发动机设计研究所 | Heat screen design method and heat screen |
-
2018
- 2018-12-12 CN CN201811518995.5A patent/CN109519284A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384846A (en) * | 2014-10-08 | 2015-03-04 | 贵州黎阳航空动力有限公司 | Method for forming large corrugated heat insulation screen |
| CN104654362A (en) * | 2015-02-13 | 2015-05-27 | 中国人民解放军国防科学技术大学 | Large-scale hyshot scramjet engine and three-dimensional petal-shaped section combustor |
| CN104896514A (en) * | 2015-05-13 | 2015-09-09 | 广东电网有限责任公司电力科学研究院 | Anti-vibration heat insulation wall of main combustion chamber of gas turbine |
| CN105135470A (en) * | 2015-09-17 | 2015-12-09 | 中国航空工业集团公司沈阳发动机设计研究所 | Method for designing heat shield and heat shield |
| CN105180204A (en) * | 2015-09-17 | 2015-12-23 | 中国航空工业集团公司沈阳发动机设计研究所 | Heat screen design method and heat screen |
Non-Patent Citations (1)
| Title |
|---|
| 邹西凤等: "基于某发动机横向波纹隔热屏高弦比的研究", 《第六届中国航空学会青年科技论坛》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906365A (en) * | 2019-10-30 | 2020-03-24 | 北京动力机械研究所 | Light and uniformly cooled longitudinal corrugated heat shield |
| CN112178693A (en) * | 2020-10-27 | 2021-01-05 | 西北工业大学 | Offset hole row and cylindrical hole row combined cooling structure for corrugated heat shield |
| CN112178693B (en) * | 2020-10-27 | 2022-04-19 | 西北工业大学 | Offset hole row and cylindrical hole row combined cooling structure for corrugated heat shield |
| CN113217949A (en) * | 2021-05-20 | 2021-08-06 | 西安航天动力研究所 | Combustion chamber diverging and cooling structure and ramjet combustion chamber |
| CN116379469A (en) * | 2023-05-15 | 2023-07-04 | 哈尔滨工程大学 | Heat-insulating rectifying structure of combustion chamber in rotary forming surface form |
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Application publication date: 20190326 |
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