CN110375331B - Evaporating pipe structure for engine combustion chamber and engine combustion chamber structure - Google Patents
Evaporating pipe structure for engine combustion chamber and engine combustion chamber structure Download PDFInfo
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- CN110375331B CN110375331B CN201910712521.2A CN201910712521A CN110375331B CN 110375331 B CN110375331 B CN 110375331B CN 201910712521 A CN201910712521 A CN 201910712521A CN 110375331 B CN110375331 B CN 110375331B
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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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Abstract
The invention discloses an evaporating pipe structure for an engine combustion chamber and the engine combustion chamber structure, wherein at least two groups of concave curved surface sections are utilized, each group of the concave curved surface sections adopts two symmetrically arranged column-shaped curved surfaces, the concave curved surface sections adopt a gradually reducing and gradually expanding structure, mixed gas flows through an evaporating pipe, a backflow zone is formed in the concave curved surface sections, the speed is reduced, the mixing space of fuel oil and air is increased, the retention time in the evaporating pipe is increased, the contact area of the mixed gas and the wall surface of the evaporating pipe is increased, and the gas heat exchange is enhanced; through the gradually-reduced and gradually-expanded curved wall surface, the fuel oil and the air can be mixed more fully under the strong shearing action brought by the gas; the outer surface of the first cylindrical section is provided with fins to enhance the heat exchange between high-temperature airflow in the flame tube and the evaporation tube, so that the temperature in the evaporation tube is increased; the mixing hole forms inclined hole jet flow to enable air to directly impact oil mist, fuel oil atomization evaporation is promoted, the fuel oil atomization evaporation effect in the evaporation pipe is enhanced, fuel oil is fully combusted, the combustion efficiency is improved, and pollutant emission is reduced.
Description
Technical Field
The invention belongs to the field of engine combustion systems, and particularly relates to an evaporation tube structure for an engine combustion chamber and the engine combustion chamber structure.
Background
The new generation of high performance micro engine using a direct current annular combustion chamber is the current development direction. The miniature direct-current combustion chamber is limited by spatial layout, and generally adopts an evaporation pipe with simple structure and low oil supply pressure to supply oil in the aspects of fuel atomization and evaporation. Structurally, it has no swirler, and the atomized evaporation of fuel depends on evaporating pipe. The combustion chamber adopting the evaporating pipe scheme has the advantages of simple structure, easiness in processing, low cost, good comprehensive combustion performance and the like.
The design of the evaporating pipe in the micro combustion chamber is important for the high-performance combustion chamber, the structural form of the evaporating pipe determines the effect of fuel atomization and evaporation, most of the evaporating pipes adopted in the micro combustion chamber are in straight-tube, T or L type structural forms, the combustion efficiency can be improved to a certain extent, but the effect is poor, the spiral evaporating pipe and the electric heating evaporating pipe are adopted in the other part, but the spiral evaporating pipe is easy to block, the evaporation rate is low, the electric heating system is too complex, and the maintenance cost is high.
In order to obtain good combustion performance, the micro turbojet engine combustion chamber not only reasonably organizes air flow, but also needs high fuel evaporation rate. The high evaporation rate is beneficial to oil-gas mixing and realizes efficient and stable combustion. Therefore, how to design a good-performance evaporation tube so as to better organize fuel atomization evaporation becomes a key technology for the development of a micro combustion chamber.
Disclosure of Invention
The invention aims to provide an evaporation tube structure for an engine combustion chamber and the engine combustion chamber structure, so as to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
an evaporation tube structure for an engine combustion chamber comprises an evaporation tube body, wherein the inner wall of the evaporation tube body sequentially comprises a first cylindrical section, an inwards concave curved surface section, a second cylindrical section and an outlet section from an air inlet end to an air outlet end; the first cylindrical section and the second cylindrical section have the same diameter;
fins are arranged on the outer surface of the first cylindrical section, and the length direction of the fins is arranged along the axial direction of the first cylindrical section;
the concave curved surface section comprises at least two groups of arc surfaces, and each group of arc surfaces comprises two symmetrically arranged column-shaped arc surfaces;
the surface of the second cylindrical section is provided with a plurality of mixing holes, and the radial included angle between the axis of each mixing hole and the second cylindrical section is 28-40 degrees;
the cross section of the outlet section along the axis is a hyperboloid structure, and the maximum inner diameter area of the outlet section is 8mm2～15mm2。
Furthermore, the wall thickness of the tube body of the evaporating tube is 0.3 mm-0.6 mm.
Furthermore, 10-25 fins are uniformly distributed on the outer surface of the first cylindrical section.
Furthermore, the length of the first cylindrical section is 18% -28% of the total length of the tube body of the evaporating tube, and the length of the fin along the axial direction of the first cylindrical section is 80% -90% of the length of the first cylindrical section; the height of the fin along the radial direction of the first cylindrical section is 2-6% of the outer diameter of the first cylindrical section; the width of the fin is 4% -8% of the outer diameter of the first cylindrical section.
Furthermore, the total volume of the mixing holes accounts for 1-3% of the tube wall volume of the tube body of the evaporation tube.
Further, the cross-sectional area of the mixing hole perpendicular to the axis is 0.01mm2～0.05mm2。
Furthermore, the curved arc length of the hyperboloid structure accounts for 16.72-41.8% of the total length of the evaporating tube body, and the chord length accounts for 16.72-27.17% of the total length of the evaporating tube body.
Furthermore, the shortest distance between the two symmetrically arranged column-shaped cambered surfaces is 37.3% -66.56% of the outer diameter of the first cylindrical section; the maximum arc length of the column-shaped arc surface is 16.72 to 31.35 percent of the total length of the evaporating tube body; the length of the curve arc at the upper end or the lower end of the column-shaped arc surface is 12.5 to 37.62 percent of the total length of the evaporating pipe body; the transition chord length between two adjacent column-shaped cambered surfaces is 18.8-27.2 percent of the column-shaped cambered surface.
Furthermore, a plurality of fins are evenly distributed on the outer surface of the first cylindrical section in the circumferential direction.
The engine combustion chamber structure has the advantages that the included angle between the axis of the fuel nozzle and the axis of the combustion chamber is 15-35 degrees, and the length of the fuel nozzle in the evaporating pipe body accounts for 1-5 percent of the total length of the evaporating pipe body; the included angle between the central axis of the evaporating pipe body and the central axis of the combustion chamber is 15-25 degrees; the length of the evaporating pipe body is the first6-12 times of the outer diameter of a cylindrical section, and the inner diameter area of the first cylindrical section is 3mm2～15mm2The wall thickness of the tube body 1 of the evaporating tube is 0.3 mm-0.6 mm.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to an evaporating pipe structure for an engine combustion chamber, which utilizes an inward concave curved surface section consisting of at least two groups of curved surfaces through a four-section structural design, wherein each group of curved surfaces adopts two symmetrically arranged cylindrical curved surfaces, the inward concave curved surface section adopts a gradually reducing and gradually expanding structure, mixed gas flows through an evaporating pipe, a backflow zone is formed in the inward concave curved surface section, the speed is reduced, the mixing space of fuel oil and air is increased, the retention time in the evaporating pipe is increased, the contact area of the mixed gas and the wall surface of the evaporating pipe is increased, and the gas heat exchange is enhanced; through the gradually-reduced and gradually-expanded curved wall surface, the fuel oil and the air can be mixed more fully under the strong shearing action brought by the gas; the outer surface of the first cylindrical section is provided with fins to enhance the heat exchange between high-temperature airflow in the flame tube and the evaporation tube, so that the temperature in the evaporation tube is increased; the mixing hole is obliquely arranged to form inclined hole jet flow, so that air directly impacts oil mist, fuel atomization evaporation is promoted, the fuel atomization evaporation effect in the evaporation tube is enhanced, fuel is sufficiently combusted, the combustion efficiency is improved, and pollutant emission is reduced.
Further, the length of the evaporating pipe body is 6-12 times of the outer diameter of the first cylindrical section, the pipe diameter is reduced, the flow velocity is increased, and the relative speed of air and fuel particles is increased, so that the evaporating rate of the evaporating pipe is improved.
Furthermore, 10-25 fins are uniformly distributed on the outer surface of the first cylindrical section, so that the strength of the evaporation tube is ensured, the heat exchange between high-temperature airflow in the flame tube and the evaporation tube is enhanced, and the temperature inside the evaporation tube is increased.
The utility model provides an engine combustion chamber structure, the evaporating pipe is along combustion chamber flame tube rear end wall circumference align to grid, and the axis of flame tube becomes certain angle, and in fuel nozzle inserted the evaporating pipe along certain angle, the fuel collided the pipe wall and forms the adherence oil film, and the oil circuit length in the evaporating pipe accounted for 1% -5% of evaporating pipe total length, forms the reverse injection with the incoming flow air, utilizes the high temperature hypoxemia condition in the high temperature gas recirculation zone, realizes stable high-efficient super low pollution's combustion mode.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a side view of the present invention.
FIG. 4 is a schematic view of a first cylindrical segment according to the present invention.
FIG. 5 is a side view of an evaporator tube of the present invention.
FIG. 6 is a cross-sectional view of a concave curved section of the present invention.
Fig. 7 shows the structure of the combustion chamber of the engine based on the structure of the evaporating pipe.
In the figure, 1, an evaporation tube body; 2. a first cylindrical section; 3. a concave curved surface section; 4. a second cylindrical section; 5. an outlet section; 6. a fin; 7. and (4) mixing holes.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1 to 6, an evaporator tube structure for an engine combustion chamber comprises an evaporator tube body 1, wherein the inner wall of the evaporator tube body 1 sequentially comprises a first cylindrical section 2, an inner concave curved section 3, a second cylindrical section 4 and an outlet section 5 from an air inlet end to an air outlet end; the first cylindrical section 2 and the second cylindrical section 4 have the same diameter; the wall thickness of the tube body 1 of the evaporating tube is 0.3 mm-0.6 mm;
the outer surface of the first cylindrical section 2 is provided with fins 6, the length direction of the fins 6 is arranged along the axial direction of the first cylindrical section, and a plurality of fins 6 are uniformly distributed on the outer surface of the first cylindrical section 2 in the circumferential direction; specifically, 10-25 fins are uniformly distributed on the outer surface of the first cylindrical section 2;
the length of the first cylindrical section 2 is 18-28% of the total length of the evaporating tube body 1, and the length of the fin 6 along the axial direction of the first cylindrical section is 80-90% of the length of the first cylindrical section 2; the height of the fin 6 along the radial direction of the first cylindrical section is 2-6% of the outer diameter of the first cylindrical section 2; the width of the fin 6 is 4% -8% of the outer diameter of the first cylindrical section 2;
the surface of the second cylindrical section 4 is provided with a plurality of mixing holes 7, and the radial included angle between the axis of each mixing hole 7 and the second cylindrical section 4 is 28-40 degrees; the total volume of the mixing holes 7 accounts for the tube body of the evaporating tube1-3% of the tube wall volume; the cross-sectional area of the mixing hole 7 perpendicular to the axis is 0.01mm2～0.05mm2；
The concave curved surface section 3 comprises at least two groups of arc surfaces, each group of arc surfaces comprises two symmetrically arranged cylindrical arc surfaces, and the shortest distance between the two symmetrically arranged cylindrical arc surfaces is 37.3% -66.56% of the outer diameter of the first cylindrical section; the maximum arc length of the column-shaped arc surface is 16.72 to 31.35 percent of the total length of the evaporating tube body 1; the arc length of the upper and lower ends of the column-shaped arc surface is 12.5-37.62% of the total length of the evaporating pipe body 1; the transition chord length between two adjacent columnar cambered surfaces is 18.8 to 27.2 percent of the columnar cambered surface; the optimally arranged concave curved surface section 3 comprises three groups of curved surfaces;
the cylindrical cambered surface means that the axes of the two cylinders are vertically arranged, the surfaces of the two cylinders are embedded into each other, and the intersecting line of the two cylinders forms a cylindrical inner contour curved surface, namely the cylindrical cambered surface; the axial directions of the cylinders where the two column-shaped cambered surfaces in each group of cambered surfaces are located are parallel;
the section of the outlet section 5 along the axis is a hyperboloid structure, and the maximum inner diameter area of the outlet section 5 is 8mm2～15mm2The curved arc length of the hyperboloid structure accounts for 16.72-41.8% of the total length of the evaporating tube body 1, and the chord length accounts for 16.72-27.17% of the total length of the evaporating tube body 1.
As shown in FIG. 7, the engine combustion chamber structure based on the above-mentioned evaporating tube structure, the included angle between the axis of the fuel nozzle and the axis of the combustion chamber is 15-35 degrees, the length of the fuel nozzle in the evaporating tube body 1 accounts for 1% -5% of the total length of the evaporating tube body 1, and the fuel nozzle is located in the first cylindrical section 2 of the evaporating tube body 1; the included angle between the central axis of the evaporating pipe body 1 and the central axis of the combustion chamber is 15-25 degrees; the length of the evaporating pipe body 1 is 6-12 times of the outer diameter of the first cylindrical section, and the inner diameter area of the first cylindrical section is 3mm2～15mm2The wall thickness of the tube body 1 of the evaporating tube is 0.3 mm-0.6 mm. The evaporating pipes are uniformly arranged along the circumferential direction of the rear end wall of the flame tube of the combustion chamber and form a certain angle with the axis of the flame tube, the fuel nozzle is inserted into the evaporating pipe along a certain angle, the fuel collides with the pipe wall to form an adherent oil film, the length of an oil circuit in the evaporating pipe accounts for 1% -5% of the total length of the evaporating pipe, and the oil circuit and the incoming air form reverse flowAnd (3) injecting, and realizing a stable, efficient and ultra-low pollution combustion mode by using the high-temperature and low-oxygen conditions in the high-temperature fuel gas reflux area.
The gradually-reduced and gradually-expanded curved wall surface, the fins, the mixing holes and the outlet section of the evaporating pipe structure for the engine combustion chamber are integrally formed, the weight is reduced, the overall size is reduced, the concave curved surface section formed by at least two groups of arc surfaces is utilized, each group of arc surfaces adopts two symmetrically-arranged cylindrical arc surfaces, the residence time of fuel in the evaporating pipe is prolonged by the connection part of two adjacent arc surfaces and the arc surface structure, the fuel can be fully evaporated in the concave curved surface section, and meanwhile, the heat exchange area of the outer wall surface is increased; the outer surface of the first cylindrical section is provided with fins to enhance the heat exchange between high-temperature airflow in the flame tube and the evaporation tube, so that the temperature in the evaporation tube is increased; the mixing hole is obliquely arranged to form inclined hole jet flow, so that air directly impacts oil mist, fuel atomization evaporation is promoted, the fuel atomization evaporation effect in the evaporation tube is enhanced, fuel is sufficiently combusted, the combustion efficiency is improved, and pollutant emission is reduced.
The included angle between the central axis of the fuel nozzle and the central axis of the combustion chamber is 15-35 degrees; when the fuel injection angle is large, a large number of droplets are tiled and adhered after the fuel droplets collide the wall, so that the fuel droplets are concentrated on one side of the evaporation tube, atomization and evaporation of the fuel droplets are seriously affected, and the particle size of the fuel droplets is generally large. If the diameter of the liquid drops in the combustion chamber is too large, the problems that the oil drops collide with the wall, the flame moves backwards, the temperature distribution at the outlet is not uniform and the like can occur.
The concave curved surface section adopts a gradually-reducing and gradually-expanding structure, mixed gas flows through the evaporating pipe, a backflow area is formed in the concave curved surface section, the speed is reduced, the mixing space of fuel oil and air is increased, the retention time in the evaporating pipe is increased, the contact area of the mixed gas and the wall surface of the evaporating pipe is increased, and the gas heat exchange is enhanced. Through the gradually-reduced and gradually-expanded curved wall surface, the fuel oil and the air can be mixed more fully under the strong shearing action brought by the gas;
the evaporation rate of the evaporation tube is improved by reducing the tube diameter and increasing the flow speed so that the relative speed of air and fuel particles is increased, but the increase of the air flow speed simultaneously reduces the retention time of oil drops in the evaporation tube, so that the heat absorption capacity is reduced, and the diameter is determined by the evaporation rate. The length of the evaporating pipe has an optimal distance to ensure that the atomization of the evaporating pipe is optimal, the liquid drop fragmentation process continues to go deep with the increase of the distance from the nozzle, the liquid drop is smaller and smaller, but after a certain distance, the relative speed of the liquid drop and air is reduced, the liquid drop is not fragmented any more, the liquid drop collision in the liquid drop group can ensure that the liquid drop is fused and becomes a liquid drop with a larger diameter, and the liquid drop is larger and larger with the increase of the distance, so the atomization quality determines the length of the evaporating pipe. The arrangement mode is determined according to the mixing degree of the reversely injected fuel and the air, and the diameter, the length and the arrangement mode of the evaporation pipe are determined on the basis; while the strength of the evaporation tube is ensured, the heat exchange between the high-temperature airflow in the flame tube and the evaporation tube is enhanced, and the temperature in the evaporation tube is increased;
the inclined hole jet flow is utilized to enable air to directly impact oil mist, relative movement of fuel oil mist drops and the air in the radial direction is increased, the contact area of the air and the fuel oil is increased, oil and gas mixing is more violent, and fuel oil evaporation is accelerated.
The strong shearing action brought by gas is utilized to enable fuel oil and air to be mixed more fully, a flow field is optimized, the temperature gradient is reduced, and the quality of a combustion temperature field is improved.
Claims (10)
1. An evaporating pipe structure for an engine combustion chamber is characterized by comprising an evaporating pipe body (1), wherein the inner wall of the evaporating pipe body (1) sequentially comprises a first cylindrical section (2), an inwards concave curved surface section (3), a second cylindrical section (4) and an outlet section (5) from an air inlet end to an air outlet end; the first cylindrical section (2) and the second cylindrical section (4) have the same diameter;
fins (6) are arranged on the outer surface of the first cylindrical section (2), and the length direction of the fins (6) is arranged along the axial direction of the first cylindrical section;
the concave curved surface section (3) comprises at least two groups of curved surfaces, and each group of curved surfaces comprises two symmetrically arranged cylindrical curved surfaces;
a plurality of mixing holes (7) are formed in the surface of the second cylindrical section (4), and the radial included angle between the axis of each mixing hole (7) and the second cylindrical section (4) is 28-40 degrees;
the cross section of the outlet section (5) along the axis is a hyperboloid structure, and the maximum inner diameter area of the outlet section (5) is 8mm2～15mm2。
2. The evaporating pipe structure for the engine combustion chamber as claimed in claim 1, wherein the length of the evaporating pipe body (1) is 6-12 times of the outer diameter of the first cylindrical section, and the wall thickness of the evaporating pipe body (1) is 0.3-0.6 mm.
3. The evaporator tube structure for the engine combustion chamber as claimed in claim 1, wherein the outer surface of the first cylindrical section (2) is uniformly provided with 10-25 fins.
4. The evaporating tube structure for the engine combustion chamber as claimed in claim 1, characterized in that the length of the first cylindrical section (2) is 18% -28% of the total length of the evaporating tube body (1), and the length of the fin (6) along the axial direction of the first cylindrical section is 80% -90% of the length of the first cylindrical section (2); the height of the fin (6) along the radial direction of the first cylindrical section is 2-6% of the outer diameter of the first cylindrical section (2); the width of the fin (6) is 4% -8% of the outer diameter of the first cylindrical section (2).
5. The evaporating pipe structure for the engine combustion chamber as claimed in claim 1, wherein the total volume of the mixing holes (7) accounts for 1% -3% of the pipe wall volume of the evaporating pipe body (1).
6. The evaporator tube structure for the engine combustion chamber as claimed in claim 1, wherein the area of the cross section of the mixing hole (7) along the axis perpendicular to the mixing hole is 0.01mm2～0.05mm2。
7. The evaporating tube structure for the engine combustion chamber as set forth in claim 1, wherein the curved arc length of the hyperboloid structure accounts for 16.72% -41.8% of the total length of the evaporating tube body (1), and the chord length accounts for 16.72% -27.17% of the total length of the evaporating tube body (1).
8. The evaporating pipe structure for the engine combustion chamber as claimed in claim 1, wherein the shortest distance between the two symmetrically arranged cylindrical arc surfaces is 37.3% -66.56% of the outer diameter of the first cylindrical section; the maximum arc length of the column-shaped arc surface is 16.72 to 31.35 percent of the total length of the evaporating pipe body (1); the curve arc length of the upper end or the lower end of the column-shaped arc surface is 12.5 to 37.62 percent of the total length of the evaporating pipe body (1); the transition chord length between two adjacent columnar cambered surfaces is 18.8-27.2% of the arc length of the columnar cambered surfaces.
9. The evaporator tube structure for the engine combustion chamber as recited in claim 1, characterized in that a plurality of fins (6) are circumferentially and uniformly distributed on the outer surface of the first cylindrical section (2).
10. An engine combustion chamber structure based on the evaporation tube structure of claim 1, characterized in that the included angle between the axis of the fuel nozzle and the axis of the combustion chamber is 15-35 degrees, and the length of the fuel nozzle in the evaporation tube body (1) accounts for 1-5% of the total length of the evaporation tube body (1); the included angle between the central axis of the evaporating pipe body (1) and the central axis of the combustion chamber is 15-25 degrees; the area of the inner diameter of the first cylindrical section is 3mm2～15mm2The wall thickness of the tube body (1) of the evaporation tube is 0.3 mm-0.6 mm.
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| CN201910712521.2A CN110375331B (en) | 2019-08-02 | 2019-08-02 | Evaporating pipe structure for engine combustion chamber and engine combustion chamber structure |
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| CN201910712521.2A CN110375331B (en) | 2019-08-02 | 2019-08-02 | Evaporating pipe structure for engine combustion chamber and engine combustion chamber structure |
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| CN110375331B true CN110375331B (en) | 2020-07-14 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111520752A (en) * | 2020-03-17 | 2020-08-11 | 西北工业大学 | Miniature combustion chamber evaporating pipe structure |
| 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 |
| CN111927629A (en) * | 2020-07-10 | 2020-11-13 | 西安增材制造国家研究院有限公司 | Evaporation tube structure for engine combustion chamber, combustion chamber device and preparation method |
| CN114234237B (en) * | 2021-12-20 | 2023-03-31 | 中国人民解放军总参谋部第六十研究所 | Head preparation method for wide-envelope starting of evaporating tube combustion chamber |
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| CN101158479A (en) * | 2006-10-03 | 2008-04-09 | 通用电气公司 | Liquid fuel enhancement for natural gas swirl stabilized nozzle and method |
| CN105422285A (en) * | 2015-11-27 | 2016-03-23 | 西北工业大学 | Micro-engine wave-type fuel-oil evaporating tube |
| CN105444206A (en) * | 2016-01-25 | 2016-03-30 | 西北工业大学 | Fin type evaporating pipe for micro-engine combustor |
| EP3434979A1 (en) * | 2017-07-24 | 2019-01-30 | Instytut Lotnictwa | Injector of an over-enriched fuel-and-air mixture to the combustion chamber of inernal combustion engines |
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- 2019-08-02 CN CN201910712521.2A patent/CN110375331B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101158479A (en) * | 2006-10-03 | 2008-04-09 | 通用电气公司 | Liquid fuel enhancement for natural gas swirl stabilized nozzle and method |
| CN105422285A (en) * | 2015-11-27 | 2016-03-23 | 西北工业大学 | Micro-engine wave-type fuel-oil evaporating tube |
| CN105444206A (en) * | 2016-01-25 | 2016-03-30 | 西北工业大学 | Fin type evaporating pipe for micro-engine combustor |
| EP3434979A1 (en) * | 2017-07-24 | 2019-01-30 | Instytut Lotnictwa | Injector of an over-enriched fuel-and-air mixture to the combustion chamber of inernal combustion engines |
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