CN105423342A - Cavity wall evaporating pipe of combustion chamber of mini-sized engine - Google Patents
Cavity wall evaporating pipe of combustion chamber of mini-sized engine Download PDFInfo
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- CN105423342A CN105423342A CN201610016163.8A CN201610016163A CN105423342A CN 105423342 A CN105423342 A CN 105423342A CN 201610016163 A CN201610016163 A CN 201610016163A CN 105423342 A CN105423342 A CN 105423342A
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- Prior art keywords
- evaporation tube
- cavity
- wall
- evaporating pipe
- combustion chamber
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
Abstract
The invention provides a cavity wall evaporating pipe of a combustion chamber of a mini-sized engine. By means of the cavity wall evaporating pipe, the contact area of gas flow and the evaporating pipe can be effectively enlarged, heat exchange is enhanced, the mixed gas standing time is prolonged, and the fuel oil atomization and evaporation effects are improved. A regular cavity structure is designed for the inner wall of the evaporating pipe, the area of the inner wall is enlarged, and space is increased. Fuel mixed gas flow forms backflow areas in cavities after flowing through the evaporating pipe, the speed is decreased, the mixing space of fuel oil and air is increased, the standing time in the evaporating pipe is prolonged, and the atomization and evaporation time is prolonged; meanwhile, the contact area is enlarged, and the heat exchange effect is enhanced. Bosses are designed on the portions, at the same positions of the cavities, on the outer wall of the evaporating pipe, the strength of the evaporating pipe is ensured, the area of the outer wall can be enlarged, heat exchange between high-temperature gas flow in a flame tube and the evaporating pipe is enhanced, the wall temperature of the evaporating pipe is raised, and the fuel atomization and evaporation effect in the evaporating pipe of the combustion chamber of the mini-sized engine is enhanced through the effects of the two aspects.
Description
Technical field
The invention belongs to field, tiny engine combustion chamber, be specifically related to a kind of tiny engine combustion chamber cavity wall evaporation tube and effectively can improve fuel-oil atmozation evaporation effect in combustion chamber, thus improve the efficiency of combustion of micro combustions indoor.
Background technology
Micro power systems was becoming domestic and international study hotspot in recent years, and wherein micro turbine engine is one of the most promising power, have volume little, lightweight, export that energy is large, density advantages of higher.The design of micro combustions room is key link in micro turbine engine, also be most important part, compared with conventional yardstick combustion chamber, this kind of combustion chamber has the advantages that characteristic size is little and surface to volume ratio is large, cause short, the radiation loss of the air-flow time of staying large, thus cause the appearance of combustion instability phenomenon.
Although carried out the correlative study work of micro combustions room both at home and abroad, but for the flow performance of micro combustions room and the research of performance less, for the combustion chamber of tiny engine (thrust is less than 50daN), mainly contain two kinds: direct current toroidal combustion chamber and backflow toroidal combustion chamber, according to current trend both at home and abroad with to direct current and the comparative analysis of backflow toroidal combustion chamber, high-performance micro engine many employings direct current annular firing, due to cost and space constraint, in fuel-oil atmozation, evaporation aspect, basic employing structure simply evaporates tubular type fuel feeding, adopt this kind of mode fuel system can obtain higher combustibility under shorter burning residence-time conditions.And the toroidal combustion chamber wherein evaporating tubular type has, and atomization is excellent, efficiency of combustion is high, charge oil pressure is low, cost is low and many-sided advantage such as lightweight.In this kind of combustion chamber, the structural design of evaporation tube is atomization to combustion chamber, efficiency of combustion plays key effect.The toroidal combustion chamber of evaporation tubular type, does not structurally have atomizer, does not have centrifugal fuel injection wheel, liquid fuel, through evaporation tube, is evaporated to gaseous state gradually, before combustion with the tentatively blending of the air in evaporation tube, thus shorten the time that air-flow is detained in combustion chamber, and Thorough combustion; Meanwhile, it does not have cyclone, is not used for producing the bluff body in stable whirlpool yet, 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 stablizes whirlpool, makes fuel oil Thorough combustion more, and makes outlet temperature meet the requirement of turbine inlet.
And it is less for the design of evaporation tube configuration aspects, kind of design mainly contains " L " type and straight barrel type, design for evaporation tube internal structure is then fewer, for above-mentioned two kinds of evaporation tubes, atomization and vaporization effect is poor, make the atomization of evaporation tube and evaporation effect better, the design of internal structure plays key effect.To the design of evaporation tube wall, fuel-oil atmozation evaporation can be improved to a certain extent, there is very large Research Prospects.
Summary of the invention
Technical problem to be solved by this invention proposes a kind of tiny engine combustion chamber cavity wall evaporation tube, has improve effect preferably to fuel-oil atmozation in combustion chamber and evaporation.Compared with prior art, advantage of the present invention is relative to other micro combustions room evaporation tubes, this structure can increase fuel oil at evaporation intraductal retention time, increase the contact area of air-flow and evaporation tube, thus evaporation tube heat transfer effect can be increased, improve the evaporation atomizing effect of fuel oil in evaporation tube, and its structure is simple, has the many-sided advantage of grade easy to process.
Technical scheme
The object of the present invention is to provide a kind of tiny engine combustion chamber cavity wall evaporation tube.
Technical solution of the present invention is as follows:
Tiny engine combustion chamber cavity wall evaporation tube, it is characterized in that: increase curved cavity at straight barrel type evaporation tube inwall, this curved cavity is the outer male structure of indent, and design parameter comprises the distribution of the cavity degree of depth, width and geometry, and wherein geometry distribution comprises radial distribution and axial distribution.Tiny engine combustion chamber evaporation tube overall dimension is wall thickness is 1 ~ 2mm, and diameter is 5 ~ 15mm, and length is 40 ~ 100mm.
Described tiny engine combustion chamber cavity wall evaporation tube, it is characterized in that: evaporation tube inwall arranges the curved cavity of multiple annular spread, the cavity degree of depth is between 0.5 ~ 2mm, and width is between 0.5 ~ 3mm, and concrete cavity size should design according to the evaporation tube size of reality.
Described tiny engine combustion chamber cavity wall evaporation tube, it is characterized in that: the same position that cavity is set at evaporation tube inwall, outer wall arranges boss structure, it is consistent that boss structure parameter and geometry are distributed in inwall cavity, boss height is between 0.5 ~ 2mm, width is between 0.5 ~ 3mm, and concrete cavity size should design according to the evaporation tube size of reality.
Evaporation tube inwall curved cavity geometry distribution (outer wall boss structure is consistent with it):
1, radial distribution: described curved cavity is around the distribution of evaporation tube central shaft equidistant ring, and quantity is between 5 ~ 60;
2, axial distribution: described curved cavity is in axial direction equally spaced, can Boulez 5 ~ 50 cavity ring structures at whole evaporation tube, adjacent pocket ring cavity arranges and can be designed as two schemes: adjacent pocket ring curved cavity has same radial distribution and adjacent pocket ring curved cavity is in staggered distribution.
The present invention has following beneficial effect:
The performance of atomization and vaporization effect to combustion chamber of evaporation tube has a significant impact, the efficiency of combustion of its major effect combustion chamber, and the combustion chamber that efficiency of combustion is high, has higher chamber performance.Compared with common evaporation tube, cavity wall evaporation tube adds inwall curved cavity and co-located outer wall boss structure, space and the area of evaporation tube inwall are increased, fuel oil increases at evaporation intraductal retention time, and increased with the contact area of internal face, heat exchange strengthens, simultaneously, the boss structure of outside wall surface increases the area of evaporation tube outside wall surface, thus add the heat exchange of high temperature gas flow in evaporation tube and burner inner liner, evaporation tube wall is further enhanced, facilitation is had to the fuel-oil atmozation evaporation in evaporation tube, the double action of internal and external parts, fuel-oil atmozation evaporation effect in evaporation tube is strengthened.
Accompanying drawing explanation
Fig. 1: the overall graphics of the evaporation tube with curved cavity
Fig. 2: carry out partial enlarged drawing to there being the evaporation tube import of curved cavity
Fig. 3: the evaporation tube front view of curved cavity and A-A sectional position schematic diagram
Fig. 4: A-A schematic cross-section
Detailed description of the invention
Now the invention will be further described by reference to the accompanying drawings:
Composition graphs 1, Fig. 3, Fig. 4, the invention provides a kind of micro combustions room evaporation tube wall structure design that effectively can strengthen heat exchange and the atomization of raising EVAP newly.Fig. 1 is the micro combustions room evaporation tube overall structure schematic diagram with curved cavity, Fig. 3 is micro combustions room evaporation tube front view, mainly show the axial distribution of cavity on evaporation tube, Fig. 4 is evaporation tube schematic cross-section, is mainly used to planform and the radial distribution feature of determining cavity.
Curved cavity shown in Fig. 3, Fig. 4 is in the distribution of evaporation tube, and air enters evaporation tube through evaporation tube import, and oil spout is carried out in evaporation tube upper end, and fuel oil and air form mixed gas, through evaporation tube evaporation atomization, enters in burner inner liner and burns.The effect of holding air-flow is had at evaporation tube inner cavity (Fig. 4), curved cavity makes the space that utilizes in evaporation tube increase, the space that fuel oil mixes with air is increased, recirculating zone can be formed in cavity simultaneously, the time allowing mixed gas stop in evaporation tube increases, the atomization and vaporization time is increased, and the contact area that fuel oil mixes gas and evaporation tube increases, and in evaporation tube, fuel oil mixes gas and evaporation tube wall heat transfer effect is enhanced; The outside wall surface of evaporation tube shown in Fig. 3 distributes regular boss, straight wall increases a series of boss structure, the area of outside wall surface obtains significant increase, in burner inner liner, high-temperature gas and evaporation tube outside wall surface contact area increase, thus add evaporation tube wall and the heat exchange of burner inner liner high temperature gas flow, wall surface temperature improves further, and the effect of two aspects makes fuel oil better in the atomization evaporation of evaporation tube.
The fuel oil that atomized evaporation is good in evaporation tube mixes gas, enters afterwards in burner inner liner and carries out combustion heat release, now more easily burn, and also can burn more fully, efficiency of combustion also improves further.The efficiency of combustion of combustion chamber improves, and the performance of burning also will be greatly improved, and the overall performance of engine also can get a promotion.
Claims (4)
1. tiny engine combustion chamber cavity wall evaporation tube, comprises evaporation tube internal face curved cavity and outside wall surface boss structure.Its characteristic is: generate radial ringed distribution and axial equally distributed internal face curved cavity and outside wall surface boss structure at evaporation tube.
2. tiny engine combustion chamber according to claim 1 cavity wall evaporation tube, it is characterized in that: the evaporation tube internal face curved cavity degree of depth is 0.5 ~ 2mm, width is 0.5 ~ 3mm, radial ringed distributed quantity is 5 ~ 60, the concrete degree of depth, width arrange and should design according to the time size of evaporation tube, and annular spread quantity also should carry out reasonable distribution according to evaporation tube diameter.
3. tiny engine combustion chamber according to claim 1 and 2 cavity wall evaporation tube, it is characterized in that: carry out outside wall surface in the equivalent locations of inwall curved cavity and boss structure is set, boss structure size is highly outward 0.5 ~ 2mm, width is 0.5 ~ 3mm, and radial is 5 ~ 60 along evaporation tube wall annular spread.
4. the tiny engine combustion chamber cavity wall evaporation tube according to claim 1,2 or 3, it is characterized in that: internal face curved cavity and outside wall surface boss structure are equally spaced at axial direction, the quantity of whole evaporation tube distribution is 5 ~ 50, concrete distributed number should be arranged according to the length of evaporation tube, longer evaporation tube, a fairly large number of cavity boss structure can be adopted, to increase inner wall space and evaporation tube inside and outside wall area.The curved cavity of adjacent pocket ring has two kinds of different designs: the completely the same and curved cavity radial distribution that is adjacent pocket ring of the curved cavity of adjacent pocket ring is in staggered distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610016163.8A CN105423342B (en) | 2016-01-12 | 2016-01-12 | Tiny engine combustion chamber cavity wall surface evaporation tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610016163.8A CN105423342B (en) | 2016-01-12 | 2016-01-12 | Tiny engine combustion chamber cavity wall surface evaporation tube |
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| CN105423342A true CN105423342A (en) | 2016-03-23 |
| CN105423342B CN105423342B (en) | 2018-08-21 |
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| CN201610016163.8A Expired - Fee Related CN105423342B (en) | 2016-01-12 | 2016-01-12 | Tiny engine combustion chamber cavity wall surface evaporation tube |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196172A (en) * | 2016-07-13 | 2016-12-07 | 西北工业大学 | Tiny engine combustor annular concave-convex wall evaporation tube |
| 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 |
| CN106678872A (en) * | 2016-11-18 | 2017-05-17 | 西北工业大学 | Mini-type engine combustion chamber cavity wall face spiral evaporation pipe |
| CN109931627A (en) * | 2019-04-03 | 2019-06-25 | 山东建筑大学 | A kind of Micro Turbine Jet Engine fuel oil choked flow atomizing nozzle structure |
| CN112902228A (en) * | 2021-03-04 | 2021-06-04 | 西北工业大学 | Honeycomb-corrugated evaporating pipe for combustion chamber of miniature engine |
| CN115218220A (en) * | 2022-09-01 | 2022-10-21 | 中国航发四川燃气涡轮研究院 | Hot spot migration control design method for main combustion chamber |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB675092A (en) * | 1949-01-25 | 1952-07-02 | Rolls Royce | Improvements relating to combustion systems of gas-turbine engines |
| CN2151425Y (en) * | 1993-02-27 | 1993-12-29 | 林世泽 | Electronic distillator unit |
| US20030037549A1 (en) * | 2001-08-24 | 2003-02-27 | Mitsubishi Heavy Industries, Ltd. | Gas turbine combustor |
| US20050039456A1 (en) * | 2003-08-05 | 2005-02-24 | Japan Aerospace Exploration Agency | Fuel/air premixer for gas turbine combustor |
| 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 |
| CN101566353A (en) * | 2009-05-11 | 2009-10-28 | 北京航空航天大学 | Double-vortex combustion chamber |
| CN204127993U (en) * | 2014-10-08 | 2015-01-28 | 中国科学院工程热物理研究所 | A kind of zigzag wall Venturi tube runner wall structure |
| 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 |
-
2016
- 2016-01-12 CN CN201610016163.8A patent/CN105423342B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB675092A (en) * | 1949-01-25 | 1952-07-02 | Rolls Royce | Improvements relating to combustion systems of gas-turbine engines |
| CN2151425Y (en) * | 1993-02-27 | 1993-12-29 | 林世泽 | Electronic distillator unit |
| US20030037549A1 (en) * | 2001-08-24 | 2003-02-27 | Mitsubishi Heavy Industries, Ltd. | Gas turbine combustor |
| US20050039456A1 (en) * | 2003-08-05 | 2005-02-24 | Japan Aerospace Exploration Agency | Fuel/air premixer for gas turbine combustor |
| 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 |
| CN101566353A (en) * | 2009-05-11 | 2009-10-28 | 北京航空航天大学 | Double-vortex combustion chamber |
| CN204127993U (en) * | 2014-10-08 | 2015-01-28 | 中国科学院工程热物理研究所 | A kind of zigzag wall Venturi tube runner wall structure |
| 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196172A (en) * | 2016-07-13 | 2016-12-07 | 西北工业大学 | Tiny engine combustor annular concave-convex wall evaporation tube |
| 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 |
| CN106678872A (en) * | 2016-11-18 | 2017-05-17 | 西北工业大学 | Mini-type engine combustion chamber cavity wall face spiral evaporation pipe |
| CN109931627A (en) * | 2019-04-03 | 2019-06-25 | 山东建筑大学 | A kind of Micro Turbine Jet Engine fuel oil choked flow atomizing nozzle structure |
| CN112902228A (en) * | 2021-03-04 | 2021-06-04 | 西北工业大学 | Honeycomb-corrugated evaporating pipe for combustion chamber of miniature engine |
| CN115218220A (en) * | 2022-09-01 | 2022-10-21 | 中国航发四川燃气涡轮研究院 | Hot spot migration control design method for main combustion chamber |
| CN115218220B (en) * | 2022-09-01 | 2023-01-17 | 中国航发四川燃气涡轮研究院 | Hot spot migration control design method for main combustion chamber |
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| CN105423342B (en) | 2018-08-21 |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhang Qun Inventor after: Li Chengyu Inventor after: Li Chaochao Inventor after: Yang Shengzhe Inventor after: Li Yifei Inventor after: Xing Li Inventor after: Wang Yuming Inventor after: Yan Dongbo Inventor before: Zhang Qun Inventor before: Li Chaochao Inventor before: Yang Shengzhe Inventor before: Li Yifei Inventor before: Xing Li Inventor before: Wang Yuming Inventor before: Yan Dongbo |
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Granted publication date: 20180821 Termination date: 20220112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |