CN106196172A - Tiny engine combustor annular concave-convex wall evaporation tube - Google Patents
Tiny engine combustor annular concave-convex wall evaporation tube Download PDFInfo
- Publication number
- CN106196172A CN106196172A CN201610550387.7A CN201610550387A CN106196172A CN 106196172 A CN106196172 A CN 106196172A CN 201610550387 A CN201610550387 A CN 201610550387A CN 106196172 A CN106196172 A CN 106196172A
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- China
- Prior art keywords
- evaporation tube
- annular concave
- evaporation
- annular
- wall surface
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- 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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Classifications
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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
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/30—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising fuel prevapourising devices
- F23R3/32—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising fuel prevapourising devices being tubular
Abstract
The invention provides a kind of tiny engine combustor annular concave-convex wall evaporation tube, can effectively strengthen heat exchange, increase the mixed gas time of staying, improve fuel-oil atmozation evaporation effect.At evaporation tube internal face appropriate design annular concave inward structure, internal face space availability ratio is increased, fuel oil mixes air-flow through evaporation tube, forming recirculating zone in cavity, speed reduces, and fuel oil increases with air blending space, the time of staying in evaporation tube increases, the time of atomization and vaporization is elongated, and mixed gas increases with the contact area of evaporation tube wall, and heat exchanging has potentiation；Annular boss is designed in cavity co-located evaporation tube outside wall surface, while ensure that evaporation tube intensity, can strengthen high temperature gas flow and evaporation tube heat exchange in burner inner liner, improve temperature in evaporation tube, in two aspect effects make tiny engine combustor evaporation tube, fuel-oil atmozation evaporation effect strengthens.
Description
Technical field
The invention belongs to tiny engine combustor field, be specifically related to a kind of evaporation tube wall structure design can be effective
Improve fuel-oil atmozation evaporation effect in combustor, thus improve the efficiency of combustion that micro combustions is indoor.
Background technology
Since the concept of the tiny engine 1980s occurs, grinding of tiny engine and correlation technique thereof
Study carefully and make a lot of progress.Micro power systems is becoming domestic and international study hotspot the most, and wherein miniature turbine starts
Machine is one of the most promising power, has that volume is little, lightweight, output energy is big, density advantages of higher.Micro combustions room
Design is key link in micro turbine engine, is also most important part, compared with conventional yardstick combustor, and this kind of burning
Room has the advantages that characteristic size is little and surface to volume ratio is big, causes air-flow time of staying section, radiation loss big, thus causes burning not
The appearance of stabilization.
Although having carried out both at home and abroad the correlational study work of micro combustions room, but for micro combustions room flow performance and
The research of performance is less, the generally annular combustor of combustor of Centimeter Level, and it is mainly used in Centimeter Level electromotor, has evaporation
Tubular type toroidal combustion chamber and centrifugal fuel injection wheel annular radial axial combustor.The toroidal combustion chamber of evaporation tubular type is widely adopted, liquid
Fuel, through evaporation tube, is gradually evaporated to gaseous state, before combustion with evaporation tube inside air the most tentatively blend, so
Shortening the time that air-flow is detained at combustor, and can preferably burn, meanwhile, it does not has cyclone, is not the most used for
Produce the bluff body stablizing whirlpool, but the inside and outside wall of burner inner liner opens a lot of regular blending hole, hole and evaporation tube exit flow
Can produce and stablize whirlpool, make fuel oil more fully burn, and make outlet temperature meet the requirement of turbine inlet.This kind of mode is used to supply
Oil mode can obtain higher combustibility under shorter burning residence-time conditions.
The quality of tiny engine chamber performance directly determines the quality of engine performance, and good for chamber performance
Bad, fuel oil efficiency of combustion plays key effect.The use of evaporation tube can improve the atomization and vaporization of fuel oil, thus improves burning effect
Rate, in the past frequently with structures such as straight tube or L-type hydraulically smooth surfaces, it is possible to increase efficiency of combustion, but effect is poor, grinding of this respect
Studying carefully and need to improve, the design of evaporation tube wall structure has Research Prospects, improves chamber performance and has very great help.
Summary of the invention
The technical problem to be solved is to propose one to strengthen micro combustions indoor EVAP atomization effect
The evaporation tube novel wall structural design scheme of fruit.This technology uses the outer male structure design of annular indent: concave inward structure can increase
Circulating area in big evaporation tube, increases fuel oil at evaporation intraductal retention time；Outer male structure can strengthen evaporation tube heat transfer, improves
Fuel-oil atmozation evaporation effect.The design of loop configuration and processing are the simplest, have many-sided advantage in engineering uses.
Technical scheme
It is an object of the invention to provide a kind of tiny engine combustor annular concave-convex wall evaporation tube.
Technical solution of the present invention is as follows:
Tiny engine combustor annular concave-convex wall evaporation tube, including: annular inner wall face concave inward structure and outside wall surface are convex
Platform structure, design parameter includes hollow depth, evagination height, Ring Width and geometric distribution.For the evaporation tube of Centimeter Level, wall
Face thickness is 1～2mm, a diameter of 5～10mm, a length of 4～10cm.
Described annular concave-convex wall evaporation tube internal face annular concave inward structure, it is characterised in that: evaporation tube internal face annular
The concave inward structure degree of depth is 0.5～2mm, and Ring Width is 0.5～3mm, is evenly distributed in evaporation tube.The tool of annular concave inward structure
Body size should carry out pro rate according to the overall dimensions of evaporation tube, on the premise of meeting requirement of strength, to recessed in wall
Row size is arranged.
Described annular concave-convex wall evaporation tube outside wall surface annular boss structure, it is characterised in that: at inwall concave inward structure
Equivalent locations carries out outside wall surface and arranges annular boss structure, and outside annular boss physical dimension, height is 0.5～2mm, and width is 0.5
～3mm, concrete size should be allocated according to the concrete size of evaporation tube, and present position is in same position with annular concave inward structure
Put, be evenly distributed in evaporation tube outside wall surface such that it is able to ensure evaporation tube intensity.
The outer male structure of evaporation tube annular indent is equally spaced at axial direction, and the quantity of whole evaporation tube distribution is 5
～50, concrete distribution situation is adjusted design according to actual evaporation tube size.
The method have the advantages that
Annular concave-convex wall evaporation tube is used in tiny engine combustor, different from common evaporation tube, in evaporation tube
Portion adds interior concave ring structure, thus adds air-flow residence time in evaporation tube, allows it have sufficient time and evaporation
Inner air tube is evaporated premix, and meanwhile, interior concave ring structure adds internal face area, so that mixed gas and evaporation in evaporation tube
Inside pipe wall face contact area increases, and heat transfer effect is strengthened, and the atomization and vaporization of fuel oil is had stiffening effect；Evaporation tube outside wall surface
Add evagination ring structure, thus add evaporation tube outside wall surface area, evaporation tube is had with high temperature gas flow heat exchange in combustor
Booster action, wall surface temperature can improve, and evaporating the fuel-oil atmozation in evaporation tube has facilitation.This two-part interpolation adds
Strong evaporation tube internal combustion oil atomization evaporation effect, thus obtain the most mixed gas of premix in evaporation tube outlet, enter combustor
After can the most fully burn, efficiency of combustion also can be significantly increased, and the raising to engine performance also plays the biggest side
Help.
Accompanying drawing explanation
Fig. 1: with the evaporation tube entirety graphics of loop configuration
Fig. 2: the evaporation tube import to there being loop configuration carries out partial enlarged drawing
The evaporation tube front view of Fig. 3: loop configuration
Fig. 4: annular concave-convex wall evaporation tube generalized section
Detailed description of the invention
In conjunction with accompanying drawing, the invention will be further described:
In conjunction with Fig. 1, Fig. 3, Fig. 4, the invention provides a kind of new can effectively strengthening heat exchange and improve EVAP mist
The tiny engine combustor annular concave-convex wall evaporation tube changed.Fig. 1 is the micro combustions room with the outer male structure of annular indent
Evaporation tube overall structure schematic diagram, Fig. 3 is that front view mainly shows the outer male structure axial distribution on evaporation tube of annular indent,
Fig. 4 is evaporation tube annular indent evagination structural section schematic diagram, is mainly used to determine hollow depth and evagination height cross section diagram.
Combustor is the core component of tiny engine, tiny engine size is little, compact conformation, be difficult to flowing and burning, burning is stayed
Staying the time short, magnitude is several milliseconds, uses evaporation tube structure to be atomized, and increases the outer male structure of annular indent in evaporation tube
Can preferably strengthen heat exchange and improve atomizing effect.
Annular concave-convex wall evaporation tube includes two-part structure: internal face annular concave inward structure and outside wall surface annular outer are tied
Structure.The outer male structure of annular indent shown in Fig. 3, Fig. 4 is in the distribution of evaporation tube.External air flow enters evaporation tube through evaporation tube import
In, evaporation tube has concave inward structure (Fig. 4) has the effect holding air-flow, annular concave inward structure to make the space that utilizes in evaporation tube increase
Greatly, the space that fuel oil mixes with air is increased, and mixed gas increases with the contact area of evaporation tube wall, air-flow and evaporation tube wall
The heat exchange in face is enhanced, and can form recirculating zone in cavity simultaneously, allows mixed gas residence time in evaporation tube increase, makes mist
Changing evaporation time to increase, the increase of both makes fuel oil atomization and vaporization effect in evaporation tube be strengthened.Evaporation shown in Fig. 3
Pipe outside wall surface is distributed regular annular outer structure, and outer male structure adds the area of evaporation tube outside wall surface, thus increases steaming
Sending out pipe and burner inner liner high temperature gas flow heat exchange, the temperature of evaporation tube wall can be significantly improved, and steams the fuel oil in evaporation tube
Send out atomization to play a driving role.The mixed gas of premix enters inside burner inner liner through evaporation tube outlet, due to the most blended in evaporation tube
Evaporate is very abundant, can burn the most more fully in evaporation tube outlet, thus reaches to improve efficiency of combustion, also to combustor
Performance improves a lot, and engine performance also is able to improve further.
Claims (4)
1. tiny engine combustor annular concave-convex wall evaporation tube, including evaporation tube internal face annular concave inward structure and outside wall surface
Boss structure, its characteristic is: generate equally distributed internal face annular concave inward structure and outside wall surface annular boss at evaporation tube
Structure.
Annular concave-convex wall evaporation tube the most according to claim 1, it is characterised in that: evaporation tube internal face annular concave inward structure
The degree of depth is 0.5～2mm, and Ring Width is 0.5～3mm, is evenly distributed in evaporation tube.The concrete size of annular concave inward structure should
Overall dimensions according to evaporation tube carries out pro rate, on the premise of meeting requirement of strength, wall indent is carried out size and sets
Put.
Annular indent wall evaporation tube the most according to claim 1 or claim 2, it is characterised in that: equal at inwall curved cavity
Position carries out outside wall surface and arranges annular boss structure, outside annular boss physical dimension height be 0.5～2mm, width be 0.5～
3mm, concrete size should be allocated according to the concrete size of evaporation tube, and present position is in same position with annular concave inward structure,
It is evenly distributed in evaporation tube outside wall surface such that it is able to ensure evaporation tube intensity.
4., according to a kind of tiny engine combustor evaporation tube wall structure design described in claim 1,2 or 3, it is special
Levy and be: the outer male structure of evaporation tube annular indent is equally spaced at axial direction, the quantity of whole evaporation tube distribution be 5～
50, concrete distribution situation is adjusted design according to actual evaporation tube size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550387.7A CN106196172A (en) | 2016-07-13 | 2016-07-13 | Tiny engine combustor annular concave-convex wall evaporation tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550387.7A CN106196172A (en) | 2016-07-13 | 2016-07-13 | Tiny engine combustor annular concave-convex wall evaporation tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106196172A true CN106196172A (en) | 2016-12-07 |
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ID=57477398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610550387.7A Pending CN106196172A (en) | 2016-07-13 | 2016-07-13 | Tiny engine combustor annular concave-convex wall evaporation tube |
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| CN (1) | CN106196172A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918055A (en) * | 2017-03-02 | 2017-07-04 | 蔡肃民 | A kind of Micro Turbine Jet Engine fuel oil choked flow atomizer |
| CN110513721A (en) * | 2019-09-19 | 2019-11-29 | 广东省航空航天装备技术研究所 | Bluff body structure surely fires combustion chamber |
| 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 |
| CN113503565A (en) * | 2021-07-08 | 2021-10-15 | 中国航发湖南动力机械研究所 | Contraction and expansion type annular evaporating pipe for micro turbine engine |
| CN114593441A (en) * | 2022-03-09 | 2022-06-07 | 西北工业大学 | Double-channel evaporation tube with disc string |
| CN114608031A (en) * | 2022-03-09 | 2022-06-10 | 西北工业大学 | Novel spiral evaporating pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050039456A1 (en) * | 2003-08-05 | 2005-02-24 | Japan Aerospace Exploration Agency | Fuel/air premixer for gas turbine combustor |
| CN102519054A (en) * | 2012-01-06 | 2012-06-27 | 北京大学 | On-duty flame stabilizer |
| CN105423342A (en) * | 2016-01-12 | 2016-03-23 | 西北工业大学 | Cavity wall evaporating pipe of combustion chamber of mini-sized engine |
-
2016
- 2016-07-13 CN CN201610550387.7A patent/CN106196172A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050039456A1 (en) * | 2003-08-05 | 2005-02-24 | Japan Aerospace Exploration Agency | Fuel/air premixer for gas turbine combustor |
| CN102519054A (en) * | 2012-01-06 | 2012-06-27 | 北京大学 | On-duty flame stabilizer |
| CN105423342A (en) * | 2016-01-12 | 2016-03-23 | 西北工业大学 | Cavity wall evaporating pipe of combustion chamber of mini-sized engine |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918055A (en) * | 2017-03-02 | 2017-07-04 | 蔡肃民 | A kind of Micro Turbine Jet Engine fuel oil choked flow atomizer |
| CN110513721A (en) * | 2019-09-19 | 2019-11-29 | 广东省航空航天装备技术研究所 | Bluff body structure surely fires combustion chamber |
| 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 |
| CN113503565A (en) * | 2021-07-08 | 2021-10-15 | 中国航发湖南动力机械研究所 | Contraction and expansion type annular evaporating pipe for micro turbine engine |
| CN113503565B (en) * | 2021-07-08 | 2022-06-28 | 中国航发湖南动力机械研究所 | Contraction and expansion type annular evaporation pipe for micro turbine engine |
| CN114593441A (en) * | 2022-03-09 | 2022-06-07 | 西北工业大学 | Double-channel evaporation tube with disc string |
| CN114608031A (en) * | 2022-03-09 | 2022-06-10 | 西北工业大学 | Novel spiral evaporating pipe |
| CN114593441B (en) * | 2022-03-09 | 2023-03-03 | 西北工业大学 | Double-channel evaporation tube with disc string |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161207 |
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| RJ01 | Rejection of invention patent application after publication |