CN105546581A - Petal-shaped wall surface evaporating pipe for micro combustion chamber - Google Patents
Petal-shaped wall surface evaporating pipe for micro combustion chamber Download PDFInfo
- Publication number
- CN105546581A CN105546581A CN201610015949.8A CN201610015949A CN105546581A CN 105546581 A CN105546581 A CN 105546581A CN 201610015949 A CN201610015949 A CN 201610015949A CN 105546581 A CN105546581 A CN 105546581A
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- China
- Prior art keywords
- petal
- evaporation tube
- lobe
- combustion chamber
- shaped wall
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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 petal-shaped wall surface evaporating pipe for a micro combustion chamber. According to the pipe, the atomization quality of fuel in the micro combustion chamber can be improved, and distribution of temperature in the combustion chamber can be effectively improved. By changing the shape of the wall surface of the evaporating pipe, the contact area between the pipe wall and high-temperature gas in the combustion chamber is enlarged, the heat exchange effect is improved, and the atomization effect of the fuel in the evaporating pipe is improved. By reasonably designing the arc-shaped transitional curved surface, the heat stress exerted on the evaporating pipe in high temperature can be effectively reduced. The evaporating pipe has the advantages that simple improvements are carried out on the design basis of traditional evaporating pipe structures, the problem that atomization in the micro combustion chamber is insufficient is solved, and the shortcoming that distribution of the heat stress is not uniform is overcome.
Description
Technical field
The invention belongs to field, micro combustions room, be specifically related to the reinforcement heat exchange in a kind of evaporation tube, accelerate EVAP, the evaporation tube structure avoiding fuel distribution uneven.
Background technology
Unmanned plane is one of emphasis of modern countries research, it military and civil on have great application.Have that volume is little, the feature such as mobility strong and good concealment, owing to not needing people to operate aboard, therefore can work in relatively rugged environment.In unmanned plane, main loading is micro combustions room, and compared with normal combustion room, it is low that micro combustions room faces efficiency of combustion, and fuel distribution is uneven, and Exit temperature distribution is uneven waits series of problems, thus the mobility of restriction unmanned plane and working environment.
In micro combustions room, the mode adopting evaporation tube fuel feeding more.Because its structure is simple, nebulization efficiency high and being widely adopted.The feature of evaporation tube is evaporated gradually at pipe internal fuel, and form certain blending with incoming flow, make oil gas can be more abundant in burning afterwards, and then, the fuel oil that the temperature that evaporation tube can make full use of burning release is come in heating tube, make fuel-oil atmozation in pipe more abundant, thus form optimum circulation.
With in the micro combustions room of evaporation tube, nozzle, from evaporation tube head ejection fuel jet, at fuel oil through evaporation tube, by absorbing heat with the contact of tube wall, makes EVAP be atomized.The skewness of outlet temperature field, OTDF is generally bigger than normal, is the general problems faced in micro combustions room.Because the volume of combustion chamber is little, primary zone is corresponding also little, so have higher requirement to the abundant atomization of fuel oil.Owing to being rich in evaporation tube, therefore some incomplete chemical reactions can be carried out central, generate the imperfect combustion products such as CO, in evaporation tube exit, flame may be caused to reflux in evaporation tube, thus evaporation tube is burnt.Avoid the problems such as the tempering of evaporation tube and the long skewness of temperature, just need the nebulization efficiency improving evaporation tube, increase fuel-oil atmozation degree.
It is tubular that evaporation tube design is generally open circles, has the taper seat of an expansion at afterbody.Its effective heat-transfer surface only has the wall of cylinder, so in order to ensure fuel-oil atmozation, just must ensure that evaporation tube has certain length, this will make reducing of micro combustions room volume more be difficult to carry out.The new evaporation tube structure of this design, considers from raising contact heat-exchanging area, heat exchange wall is innovated to some extent, while increase heat exchange area, and the simplicity of holding structure.
Summary of the invention
Technical problem to be solved by this invention is the evaporation tube structure that can increase heat exchange area and efficiency of a kind of petal-shaped wall in micro combustions room.Compared with prior art, this invention mainly utilizes the special shape of wall, increase in limited space with around the area of hot air impingement, thus increase heat exchange raising heat exchange efficiency.Compared with common evaporation tube, the present invention increases bending on tube wall, and make in same space, heat exchange area significantly promotes, and meanwhile, structure is also very simple, handling ease.
Technical scheme
The object of the present invention is to provide a kind of micro combustions room petal-shaped wall evaporation tube structure.
The object of the present invention is achieved like this:
Evaporation tube tube wall adopts hexapetalous flower valvular structure, and wherein petal is the major arc part of radius corresponding to the circle of 2mm, and its angle is 200 °.The rounded transitional of 0.5mm is adopted between lobe and lobe.Evaporation tube internal diameter is 8mm, wall thickness 1mm.Evaporation tube main body is the hollow cylindrical in petal shape cross section, forms flare openings at end.
For the evaporation tube that diameter itself is less, lobe number can correspondingly reduce, but is generally not less than 4 lobes, in the design, ensure that petal quantity is even number, thus can ensure the symmetry of evaporation tube, reduces the thermal stress suffered by tube wall.
In Transition Design between petal, the circular arc adopted is minor arc part, and corresponding radius is 0.5mm ~ 1mm, and in order to reduce the thermal stress between petal, when lobe number is many, the radius of transition arc wants corresponding reduction.Meanwhile, when lobe number is many, the arc radius that petal is used and corresponding fillet want corresponding reduction, to ensure best heat exchange efficiency.
Adopt the present invention can obtain following beneficial effect:
1. the present invention adopts the evaporation tube wall in petal shape cross section, makes evaporation tube wall area increase in unit space, and heat transfer effect promotes, and fuel oil is atomized more thorough in evaporation tube;
2. because the evaporation tube heat exchange efficiency of unit length promotes, so in the reality of micro combustions room, the present invention effectively can reduce chamber length;
3. air-fuel mixture is more even, thus can improve micro combustions room efficiency of combustion, eliminates the appearance of localized hyperthermia's point;
4. structure of the present invention is simple, is easy to processing, can coordinates very well with micro combustions room.
Accompanying drawing explanation
Fig. 1: evaporation tube side view;
Fig. 2: evaporation tube top view;
Fig. 3: evaporation tube sectional view;
Fig. 4: the three-dimensional overall schematic of evaporation tube.
Detailed description of the invention
Now the invention will be further described by reference to the accompanying drawings:
Composition graphs 1, Fig. 2, the invention provides a kind of evaporation tube project organization that effectively can improve fuel-oil atmozation efficiency in micro combustions room.Fig. 1 is the side view of evaporation tube wall, and Fig. 2 is the tube section figure that evaporation tube is seen from mouth of pipe direction, obviously can see the petal shape of outlet spout, Fig. 3 is tube wall sectional view, can find out that inside and outside wall all have employed petal, and excessive with fillet, and Fig. 4 is the stereogram of evaporation tube.
In micro combustions room, because volume is small, so burning can face series of problems, local temperature is too high, burns insufficient, carbon distribution etc., its subject matter is that fuel oil time of staying in micro combustions room is short, and combustion oil atomization is even not, makes fuel distribution local too high.Evaporation tube is the main device of micro combustions room for atomized fuel, and the efficiency of evaporation tube atomized fuel will directly affect mist of oil burning in a combustion chamber, and then determines the performance of micro combustions room.
The structure of evaporation tube is comparatively simple, and its principle is the heat heating tube wall utilizing combustion chambers burn to release, makes the oil bundle in pipe carry out atomization and vaporization by heat absorption, forms oil vapour, oil vapour from evaporation tube out after, mix with the indoor air flow that burns and burn.The present invention has carried out certain improvement to evaporation tube tube wall, evaporation tube sectional view shown in Fig. 1, Fig. 3 and side view can be found out, by making evaporation tube wall petalody type, add evaporation tube and the contact area of burning outdoor gas, too increase the contact area of oil bundle and inside pipe wall simultaneously.When oil bundle sprays into from evaporation tube head, after tube wall area increases, the probability that oil bundle and tube wall can be made to collide increases, can oil film be effectively made tentatively to be broken into droplet, simultaneously, with the collision process of wall, a part of fuel oil can be attached on wall, thus the oil on wall can be made to evaporate faster.Because inside, tube wall face is circular arc, oil bundle can stop longer distance in adherent motion in chamber, and then adds the time of EVAP, thus effectively can promote the atomization and vaporization of fuel oil.As shown in Figure 3, tube wall adopts fillet to carry out excessively between " petal ", thus can effectively reduce localized heat stress, thus effectively increases the life-span of evaporation tube.
Claims (4)
1. the petal-shaped wall evaporation tube in micro combustions room, is characterized in that: the mouth of pipe of micro combustions room evaporation tube is petal, and petal is the major arc part of circular arc, and corresponding fillet excursion is between 210 ° ~ 270 °.The radius change scope of the circular arc that petal wall adopts is between 2mm ~ 3mm.
2. the petal-shaped wall evaporation tube in a kind of micro combustions room according to claim 1, is characterized in that: adopt rounding to be connected between petal, and to prevent between lobe and lobe excessively sharply, rounding size radius excursion 0.5mm ~ 1mm, its arc is minor arc part.
3. the petal-shaped wall evaporation tube in a kind of micro combustions room according to claim 1 and 2, it is characterized in that: the quantity of petal can carry out taking the circumstances into consideration adjustment according to actual conditions, and setting lobe number is even number, to ensure the symmetry of evaporation tube, but lobe number is not less than pintongs, to prevent between lobe transition sharply.The selection of lobe number is determined by the diameter of evaporation tube, and evaporation tube diameter is larger, corresponding increase lobe number.
4. the petal-shaped wall evaporation tube in a kind of micro combustions room according to claim 1,2 or 3, is characterized in that: the diameter of the knuckle between lobe and lobe increases along with lobe diameter and increases.Lobe number is more, and the diameter of petal and the angle of corresponding circular arc suitably reduce, and ensures that the effective heat exchange area of evaporation tube is maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610015949.8A CN105546581A (en) | 2016-01-12 | 2016-01-12 | Petal-shaped wall surface evaporating pipe for micro combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610015949.8A CN105546581A (en) | 2016-01-12 | 2016-01-12 | Petal-shaped wall surface evaporating pipe for micro combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105546581A true CN105546581A (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610015949.8A Pending CN105546581A (en) | 2016-01-12 | 2016-01-12 | Petal-shaped wall surface evaporating pipe for micro combustion chamber |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915855A (en) * | 2019-03-01 | 2019-06-21 | 西北工业大学 | Double oil circuits liquidate simple nozzle |
| CN110081464A (en) * | 2019-01-18 | 2019-08-02 | 西北工业大学 | Tiny engine combustion chamber annular evaporation tube |
| CN114623467A (en) * | 2022-01-27 | 2022-06-14 | 北京盈天航空动力科技有限公司 | Lobe type flame tube structure of microminiature turbojet engine |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201053353Y (en) * | 2006-12-29 | 2008-04-30 | 深圳市康铖机械设备有限公司 | Mini turbine jet engine |
| CN102261652A (en) * | 2011-08-10 | 2011-11-30 | 大连经济技术开发区水国燃烧器有限公司 | Petal burner |
| CN202792028U (en) * | 2012-09-14 | 2013-03-13 | 华中科技大学 | Petal-shaped burner |
| KR101254170B1 (en) * | 2010-11-30 | 2013-04-18 | 두산중공업 주식회사 | Combustor liner for a gas turbine and the manufacturing method thereof |
| US20130256432A1 (en) * | 2012-03-30 | 2013-10-03 | Solar Turbines Incorporated | Air blocker ring assembly with leading edge configuration |
| WO2013154626A1 (en) * | 2012-01-31 | 2013-10-17 | United Technologies Corporation | Heat shield for a combustor |
| JP2013238352A (en) * | 2012-05-15 | 2013-11-28 | Ihi Corp | Lower nox combustor of rql system |
| CN203620485U (en) * | 2013-09-27 | 2014-06-04 | 林锦志 | Freezing dryer |
| CN104791140A (en) * | 2014-01-17 | 2015-07-22 | 罗伯特·博世有限公司 | Gas injector for the direct injection of gaseous fuel into a combustion chamber |
| CN204513399U (en) * | 2015-02-12 | 2015-07-29 | 上海林内有限公司 | Petal type big fire cover and be provided with the burner of petal type big fire cover |
-
2016
- 2016-01-12 CN CN201610015949.8A patent/CN105546581A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201053353Y (en) * | 2006-12-29 | 2008-04-30 | 深圳市康铖机械设备有限公司 | Mini turbine jet engine |
| KR101254170B1 (en) * | 2010-11-30 | 2013-04-18 | 두산중공업 주식회사 | Combustor liner for a gas turbine and the manufacturing method thereof |
| CN102261652A (en) * | 2011-08-10 | 2011-11-30 | 大连经济技术开发区水国燃烧器有限公司 | Petal burner |
| WO2013154626A1 (en) * | 2012-01-31 | 2013-10-17 | United Technologies Corporation | Heat shield for a combustor |
| US20130256432A1 (en) * | 2012-03-30 | 2013-10-03 | Solar Turbines Incorporated | Air blocker ring assembly with leading edge configuration |
| JP2013238352A (en) * | 2012-05-15 | 2013-11-28 | Ihi Corp | Lower nox combustor of rql system |
| CN202792028U (en) * | 2012-09-14 | 2013-03-13 | 华中科技大学 | Petal-shaped burner |
| CN203620485U (en) * | 2013-09-27 | 2014-06-04 | 林锦志 | Freezing dryer |
| CN104791140A (en) * | 2014-01-17 | 2015-07-22 | 罗伯特·博世有限公司 | Gas injector for the direct injection of gaseous fuel into a combustion chamber |
| CN204513399U (en) * | 2015-02-12 | 2015-07-29 | 上海林内有限公司 | Petal type big fire cover and be provided with the burner of petal type big fire cover |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081464A (en) * | 2019-01-18 | 2019-08-02 | 西北工业大学 | Tiny engine combustion chamber annular evaporation tube |
| CN109915855A (en) * | 2019-03-01 | 2019-06-21 | 西北工业大学 | Double oil circuits liquidate simple nozzle |
| CN114623467A (en) * | 2022-01-27 | 2022-06-14 | 北京盈天航空动力科技有限公司 | Lobe type flame tube structure of microminiature turbojet engine |
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Application publication date: 20160504 |