CN109737454A - A kind of variable cross-section annular evaporation tube - Google Patents
A kind of variable cross-section annular evaporation tube Download PDFInfo
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- CN109737454A CN109737454A CN201910000587.9A CN201910000587A CN109737454A CN 109737454 A CN109737454 A CN 109737454A CN 201910000587 A CN201910000587 A CN 201910000587A CN 109737454 A CN109737454 A CN 109737454A
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- evaporation tube
- fuel oil
- variable cross
- tube
- evaporation
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Abstract
The present invention provides a kind of variable cross-section annular evaporation tubes.Fuel oil enters evaporation tube head guide ring by fuel oil transport tube, subsequently into varying-arca channel.Annular evaporation tube inner wall front is equipped with helicitic texture, and rear portion is equipped with oil spit hole, and part fuel oil enters combustion chamber by oil spit hole in advance and burns, remaining fuel oil enters combustion chamber from the outlet of evaporation tube tail portion.Annular evaporation tube substantially increases the contact area with air-flow, and variable cross-section designs the residence time for extending fuel oil, and the helicitic texture being arranged on wall surface improves heat exchange efficiency, is obviously improved fuel-oil atmozation, evaporation effect, to improve efficiency of combustion.
Description
Technical field
The invention belongs to tiny engine combustion chamber fields, and in particular to a kind of variable cross-section annular evaporation tube.
Background technique
In recent years, with the development of micro electro mechanical system (MEMS) technology, minute vehicle has become aerospace field and most inhales
The product of gravitation.Since its body is small, light, the peculiar function that is not achieved with conventional aircraft, especially militarily can be used as
Scouting, information collection tool under particular surroundings, or even as attack weapon (micro missile), thus it is extremely challenging, by
The attention of the especially military, national governments, has many experimental prototypes at present and product comes out.And wherein power device is miniature
Change problem is then the key technology of the stronger more flexible new micro aircraft of performance.The design of micro combustions room directly affects micro-
The performance quality of h type engine h.Compared with conventional scale combustion chamber, such combustion chamber has that characteristic size is small and surface to volume ratio is big
Feature, causes that the air-flow residence time is short, radiation loss is big, so as to cause the appearance of combustion instability phenomenon.
Currently, tiny engine can be divided into grade, Centimeter Level two types, millimeter stage motor uses fuel gas,
Centimetre stage motor is mainly using liquid fuel as fuel.For Centimeter Level combustion chamber, in order to make fuel oil and air sufficiently blend combustion
It burns, needs reasonably to organize indoor air-flow fluidal texture of burning.The micro-power plant of mainstream mostly uses greatly at present
Evaporation tube structure carries out fuel-oil atmozation.The atomizing effect of evaporation tube has a significant impact to micro combustions room performance, so evaporation tube
Structure design aspect has very big Research Prospects.
Summary of the invention
The technical problem to be solved by the present invention is to propose a kind of variable cross-section annular evaporation tube, compared with prior art,
The advantages of this programme is the annular evaporation tube using variable cross-section, has bigger contact area with air-flow, absorbs more heats
Evaporation for fuel oil.When fuel oil enters evaporation tube by fuel oil conveying pipe, circulation area constantly increases with the movement of fuel oil
Greatly, fuel flow rate constantly reduces, and the residence time is elongated, can absorb more heats.The fuel oil of part evaporation is opened from inner wall
If aperture enter micro combustions room, burn, most fuel oil from the tail portion of evaporation tube outlet enter combustion chamber, with gas
Stream constantly blending, and realize combustion process.
Technical solution
The purpose of the present invention is to provide a kind of variable cross-section annular evaporation tubes.
Technical solution of the present invention is as follows:
A kind of variable cross-section annular evaporation tube, comprising: fuel oil transport tube evaporates tube head guide ring, the evaporation of variable cross-section annular
Pipe structure, the helicitic texture and fuel oil aperture of evaporation tube inner wall, it is characterised in that: fuel oil transport tube is fixed on evaporation tube and combustion
It burns between indoor wall surface, it is circumferential evenly distributed, it is arranged 4~8, every fuel oil transports 30~40mm of length of tube, 3~5mm of outer diameter,
1~1.5mm of wall thickness.The guide ring on head is connected with fuel oil transport tube and the annular inside and outside wall surface of evaporation tube, forms semiclosed knot
Fuel oil is imported varying-arca channel part, guide ring deep 8~10mm, wide 10~12mm by structure.Fuel oil enters ring by conveying pipe
Shape evaporates tube head guide ring, subsequently enters the varying cross-section duct being made of annular evaporation tube outside wall surface and annular evaporation tube inner wall
Road.Annular evaporation tube inner wall is equal diameter wall surface, and diameter is 5~6mm, and wall thickness is 1~2mm, annular evaporation pipe outer wall
Face is expansion wall surface, and head diameter is 7~9mm, and tail diameter is 12~16mm.On the inner wall of annular evaporation tube first half
Equipped with screw thread, 0.1~0.3mm of the depth of thread, spacing 0.5mm, 7~9mm of length.In the inner wall of annular evaporation tube latter half
On open up fuel oil aperture, open up 6~8, circumferential array, 0.4~0.6mm of aperture.
The variable cross-section annular evaporation tube of program design the advantage is that evaporation tube using endless tube, inside and outside evaporation tube
Two sides and air flow contacts, substantially increase heat exchange area.The structure of variable cross-section is used simultaneously, and fuel flow rate reduces, and stops
Time is elongated, and atomizing effect is improved.On annular evaporation tube inner wall be equipped with screw thread, can enhanced heat transfer effect, improve
The evaporation rate of fuel oil, the fuel oil that the aperture opened up can make part gasify enter combustion chamber in advance, participate in combustion process, by
In the reduction of fuel flow in pipe, under identical heat transfer boundary condition, remaining fuel-oil atmozation evaporation effect is enhanced.
Detailed description of the invention
A kind of Fig. 1: variable cross-section annular evaporation tube overall schematic
A kind of Fig. 2: variable cross-section annular evaporation tube head schematic diagram
Fig. 3: annular evaporation tube inner wall structural schematic diagram
1- fuel oil transport tube 2- evaporates tube head guide ring 3- annular evaporation tube outside wall surface 4- annular evaporation tube in figure
The outlet of inner wall 5- oil spit hole 6- screw thread 7- fuel oil transport tube
Specific embodiment
Now in conjunction with attached drawing, the invention will be further described:
In conjunction with Fig. 1, Fig. 2 and Fig. 3, the present invention provides a kind of technical solutions of variable cross-section annular evaporation tube.Fig. 1 is one kind
Variable cross-section annular evaporation tube overall schematic, Fig. 2 are that a kind of variable cross-section annular evaporates tube head schematic diagram, and Fig. 3 is annular evaporation
Inside pipe wall face structural schematic diagram.
Fuel oil passes through fuel oil transport tube 1 first and fuel oil transport tube outlet 7 enters evaporation tube head guide ring 2, by leading
After flowing ring distribution, into the varying-arca channel being made of annular evaporation tube outside wall surface 3 and annular evaporation tube inner wall 4, fuel oil stream
Logical area increases, and flow velocity reduces, and the residence time increases.Screw thread 6, Ke Yijin is equipped in the first half of annular evaporation tube inner wall
One step enhances heat transfer effect, and fuel oil is made to absorb more heats, accelerates fuel-oil atmozation and evaporation process.Inside pipe wall is evaporated in annular
The latter half in face is equipped with oil spit hole 5, and the fuel oil of partial gasification enters combustion chamber by oil spit hole in advance, participates in burned
Journey.Most fuel oil enters combustion chamber from the outlet of evaporation tube tail portion and is divided into two parts, and a part is with air motion to evaporation
Pipe lateral area, another part then enter the cylindrical streams region surrounded by annular evaporation tube inner wall, and in two regions
Combustion reaction is completed, heat is discharged, partial heat passes to the fuel oil in annular evaporation tube.Ring structure can improve evaporation tube with
The contact area of air-flow, the design of variable cross-section also extend the residence time of fuel oil, and the helicitic texture by being arranged on wall surface,
Heat exchange efficiency is improved, so that fuel-oil atmozation, evaporation effect are obviously improved, to improve efficiency of combustion.
Claims (5)
1. a kind of variable cross-section annular evaporation tube, comprising: fuel oil transport tube evaporates tube head guide ring, variable cross-section annular evaporation tube
Structure, evaporation tube inner wall helicitic texture and fuel oil aperture, characteristic are: fuel oil enters evaporation tube head by fuel oil transport tube
Portion's guide ring, later enter varying-arca channel, part fuel oil by oil spit hole enter combustion chamber participate in burn, remaining fuel oil from
The outlet of evaporation tube tail portion enters combustion chamber and completes burning.
2. a kind of variable cross-section annular evaporation tube according to claim 1, it is characterised in that: fuel oil transport tube is fixed on evaporation
It is circumferential evenly distributed between pipe and internal face of combustion chamber, it is arranged 4~8, every fuel oil transports 30~40mm of length of tube, outer diameter 3
~5mm, 1~1.5mm of wall thickness.
3. a kind of variable cross-section annular evaporation tube according to claim 1, it is characterised in that: evaporation tube head guide ring and combustion
Oily transport tube is connected with the annular inside and outside wall surface of evaporation tube, forms semi-closed structure, and fuel oil is imported varying-arca channel part, is led
Flow ring deep 8~10mm, 10~12mm of water conservancy diversion ring width.
4. a kind of variable cross-section annular evaporation tube according to claim 1, it is characterised in that: variable cross-section annular evaporation tube structure
It is made of evaporation tube outside wall surface and evaporation tube inner wall, evaporation tube inner wall is equal diameter wall surface, and diameter is 5~6mm, and wall surface is thick
Degree is 1~2mm, and evaporation tube outside wall surface is expansion wall surface, and head diameter is 7~9mm, and tail diameter is 12~16mm.
5. a kind of variable cross-section annular evaporation tube according to claim 1 or 4, it is characterised in that: annular evaporation tube first half
Point inner wall be equipped with screw thread, 0.1~0.3mm of the depth of thread, spacing 0.5mm, 7~9mm of length is later half in annular evaporation tube
Fuel oil aperture is opened up on partial inner wall, opens up 6~8, circumferential array, 0.4~0.6mm of aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000587.9A CN109737454A (en) | 2019-01-02 | 2019-01-02 | A kind of variable cross-section annular evaporation tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000587.9A CN109737454A (en) | 2019-01-02 | 2019-01-02 | A kind of variable cross-section annular evaporation tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109737454A true CN109737454A (en) | 2019-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910000587.9A Pending CN109737454A (en) | 2019-01-02 | 2019-01-02 | A kind of variable cross-section annular evaporation tube |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520753A (en) * | 2020-03-17 | 2020-08-11 | 西北工业大学 | Bifurcated type micro engine combustion chamber evaporating pipe with turbulence column |
| CN111853854A (en) * | 2020-06-19 | 2020-10-30 | 中国航发湖南动力机械研究所 | Evaporation pipe integrated structure, evaporation pipe type combustion chamber and micro turbojet engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627365A (en) * | 2016-01-19 | 2016-06-01 | 西北工业大学 | Micro combustion chamber punching type evaporation pipe |
| CN106678874A (en) * | 2016-11-18 | 2017-05-17 | 西北工业大学 | Micro engine combustor annular concave-convex wall face spiral type evaporating pipe |
| CN107906560A (en) * | 2017-11-09 | 2018-04-13 | 四川达宇特种车辆制造厂 | A kind of standing vortex declines type gas turbine combustors |
| CN108131684A (en) * | 2017-12-14 | 2018-06-08 | 西北工业大学 | A kind of annular oil feeding type integration after-burner |
| CN108613217A (en) * | 2018-03-29 | 2018-10-02 | 北京航天动力研究所 | A kind of partly-premixed injection device of distribution formula and combustion chamber |
| CN108716695A (en) * | 2018-04-02 | 2018-10-30 | 西北工业大学 | A kind of tiny engine combustion chamber mononuclear type evaporation tube structure design |
-
2019
- 2019-01-02 CN CN201910000587.9A patent/CN109737454A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627365A (en) * | 2016-01-19 | 2016-06-01 | 西北工业大学 | Micro combustion chamber punching type evaporation pipe |
| CN106678874A (en) * | 2016-11-18 | 2017-05-17 | 西北工业大学 | Micro engine combustor annular concave-convex wall face spiral type evaporating pipe |
| CN107906560A (en) * | 2017-11-09 | 2018-04-13 | 四川达宇特种车辆制造厂 | A kind of standing vortex declines type gas turbine combustors |
| CN108131684A (en) * | 2017-12-14 | 2018-06-08 | 西北工业大学 | A kind of annular oil feeding type integration after-burner |
| CN108613217A (en) * | 2018-03-29 | 2018-10-02 | 北京航天动力研究所 | A kind of partly-premixed injection device of distribution formula and combustion chamber |
| CN108716695A (en) * | 2018-04-02 | 2018-10-30 | 西北工业大学 | A kind of tiny engine combustion chamber mononuclear type evaporation tube structure design |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520753A (en) * | 2020-03-17 | 2020-08-11 | 西北工业大学 | Bifurcated type micro engine combustion chamber evaporating pipe with turbulence column |
| CN111853854A (en) * | 2020-06-19 | 2020-10-30 | 中国航发湖南动力机械研究所 | Evaporation pipe integrated structure, evaporation pipe type combustion chamber and micro turbojet engine |
| CN111853854B (en) * | 2020-06-19 | 2022-03-25 | 中国航发湖南动力机械研究所 | Evaporation pipe integrated structure, evaporation pipe type combustion chamber and micro turbojet engine |
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Application publication date: 20190510 |