阅读说明：本技术 隐身旋流混合装置 (Stealthy whirl mixing arrangement ) 是由 周开福 文清兰 周公铜 赵中豪 于 2021-08-16 设计创作，主要内容包括：本发明提供了一种隐身旋流混合装置,包括燃烧室筒体机闸、内柱体、低压涡轮叶片、内涵机闸,所述内涵机闸设于燃烧室筒体机闸内,内涵机闸与燃烧室筒体机闸之间形成外涵道,内涵机闸内设有内柱体、低压涡轮叶片,内柱体与内涵机闸壁面之间沿环形分布有多个一体化整流混合支板,一体化整流混合支板位于低压涡轮叶片下游,一体化整流混合支板为中空结构,并与外涵道连通,一体化整流混合支板上分布有多个气膜孔。本发明通过整流支板与混合器一体化设计,减小了发动机重量；提高了掺混的均匀性；空气从气膜孔流出时形成气膜,利用一体化整流混合支板对低压涡轮叶片的遮挡,实现了红外隐身。(The invention provides a stealth rotational flow mixing device which comprises a combustion chamber cylinder machine brake, an inner cylinder, low-pressure turbine blades and an inner culvert machine brake, wherein the inner culvert machine brake is arranged in the combustion chamber cylinder machine brake, an outer culvert is formed between the inner culvert machine brake and the combustion chamber cylinder machine brake, the inner cylinder and the low-pressure turbine blades are arranged in the inner culvert machine brake, a plurality of integrated rectifying and mixing support plates are annularly distributed between the inner cylinder and the wall surface of the inner culvert machine brake, the integrated rectifying and mixing support plates are positioned at the downstream of the low-pressure turbine blades, the integrated rectifying and mixing support plates are of a hollow structure and are communicated with the outer culvert, and a plurality of air film holes are distributed on the integrated rectifying and mixing support plates. The invention reduces the weight of the engine by the integrated design of the rectifying support plate and the mixer; the blending uniformity is improved; the air forms the air film when flowing out from the air film hole, utilizes the mixed extension board of integration rectification to the sheltering from of low pressure turbine blade, has realized infrared stealthy.)

1. A stealthy whirl mixing arrangement which characterized in that: including combustion chamber barrel machine floodgate (1), inner cylinder (2), low pressure turbine blade (4), culvert machine floodgate (5), in combustion chamber barrel machine floodgate (1) was located in culvert machine floodgate (5), form between culvert machine floodgate (5) and the combustion chamber barrel machine floodgate (1) outer duct (6), be equipped with inner cylinder (2) in culvert machine floodgate (5), low pressure turbine blade (4), it has a plurality of integration rectification to mix extension board (3) to distribute along the annular between inner cylinder (2) and culvert machine floodgate (5) wall, the mixed extension board of integration rectification (3) is located low pressure turbine blade (4) low reaches, the mixed extension board of integration rectification (3) is hollow structure to with outer duct (6) intercommunication, it has a plurality of air film holes (7) to distribute on the mixed extension board of integration rectification (3).

2. A cloaking swirl mixing apparatus as claimed in claim 1 wherein: the longitudinal section of the integrated rectifying and mixing support plate (3) is crescent.

3. The stealth swirl mixing apparatus of claim 1 or 2, wherein: the integrated rectification mixing support plate (3) is obliquely arranged along the airflow direction, and an attack angle is formed between the integrated rectification mixing support plate (3) and the airflow direction.

4. A cloaking swirl mixing apparatus as claimed in claim 3 wherein: the attack angle is 5-15 degrees.

5. The stealth swirl mixing apparatus of claim 2, wherein: and the two arched surfaces of the integrated rectifying and mixing support plate (3) are provided with air film holes (7).

6. A cloaking swirl mixing apparatus as claimed in claim 1 or claim 5 wherein: the diameter of the air film hole (7) is 1 mm-2 mm.

7. A cloaking swirl mixing apparatus as claimed in claim 1 wherein: the part of the integrated rectification mixing support plate (3) communicated with the outer duct (6) is provided with a gas-leading port which is an inclined plane structure gradually expanding towards the outer duct (6).

8. A cloaking swirl mixing apparatus as claimed in claim 1 wherein: the downstream end of the inner cylinder (2) is provided with a cone (8).

9. A cloaking swirl mixing apparatus as claimed in claim 1 wherein: air in the outer duct (6) enters the integrated rectifying and mixing support plate (3) and flows out of the air film holes (7), and an air film is formed on the outer surface of the integrated rectifying and mixing support plate (3).

10. A cloaking swirl mixing apparatus as claimed in claim 1 wherein: the integrated rectifying and mixing support plate (3) completely shields the low-pressure turbine blade (4) in the axial direction.

Technical Field

The invention relates to the technical field of aeroengine mixing devices; in particular to a stealthy rotational flow mixing device.

Background

Along with military aircraft demand development, aeroengine passes through to turbofan aeroengine from turbojet aeroengine, and turbofan aeroengine has two ducts of connotation and bypass, needs the hybrid system to get into afterburning room or spray tube with connotation gas, the mixing of bypass air. The mixing device is a mixing part of a turbofan aircraft engine and is used for improving the propelling efficiency of the engine or improving the fuel atomization and combustion conditions of an afterburner.

At present, the mixing device that current turbofan aeroengine was used commonly has parallel mixer, funnel blender, lobe blender, chrysanthemum flower type blender etc. and outer culvert low-speed air and the high-speed gas of inner culvert flow through the blender because the velocity difference forms the flow direction whirlpool to reach outer culvert low temperature air and the high-temperature gas mixing effect of inner culvert. However, these mixers cannot realize the stealth of the high-temperature low-pressure turbine, and the weight of the engine is increased due to the design of the rectifying support plate and the mixer separately.

Chinese patent publication No. CN210752467U discloses a mixer, which has a flue gas inlet, a mixing section, a contraction section, an expansion section and a flue gas outlet in sequence along the flow direction of flue gas, wherein the side wall of the mixing section is tangentially provided with a reducing agent inlet, the contraction section is provided with a screw, and the expansion section is provided with a spoiler. The mixer is not suitable for mixing low-temperature air in an outer culvert and high-temperature fuel gas in an inner culvert of an aeroengine, does not have a stealth function, and cannot reduce the weight.

Disclosure of Invention

In order to solve the technical problem, the invention provides a stealth rotational flow mixing device.

The invention is realized by the following technical scheme.

The invention provides a stealth rotational flow mixing device which comprises a combustion chamber barrel machine brake, an inner cylinder, low-pressure turbine blades and an inner culvert machine brake, wherein the inner culvert machine brake is arranged in the combustion chamber barrel machine brake, an outer culvert is formed between the inner culvert machine brake and the combustion chamber barrel machine brake, the inner cylinder and the low-pressure turbine blades are arranged in the inner culvert machine brake, a plurality of integrated rectifying and mixing support plates are annularly distributed between the inner cylinder and the wall surface of the inner culvert machine brake, the integrated rectifying and mixing support plates are positioned at the downstream of the low-pressure turbine blades, the integrated rectifying and mixing support plates are of a hollow structure and are communicated with the outer culvert, and a plurality of air film holes are distributed on the integrated rectifying and mixing support plates.

The longitudinal section of the integrated rectifying mixing support plate is crescent.

The integrated rectification mixing support plate is obliquely arranged along the airflow direction, and an attack angle is formed between the integrated rectification mixing support plate and the airflow direction.

The attack angle is 5-15 degrees.

And the two arched surfaces of the integrated rectifying mixing support plate are provided with air film holes.

The diameter of the air film hole is 1 mm-2 mm.

The position of the integrated rectification mixing support plate communicated with the outer duct is provided with a gas-leading port which is of an inclined plane structure gradually expanding towards the outer duct.

The downstream end of the inner cylinder is provided with a cone.

And air in the outer duct enters the integrated rectification mixing support plate and flows out of the air film hole, and an air film is formed on the outer surface of the integrated rectification mixing support plate.

The integrated rectifying mixing support plate completely shields the low-pressure turbine blade in the axial direction.

The invention has the beneficial effects that:

the invention has the following advantages: (1) by the integrated design of the rectification support plate and the mixer, the weight of the engine is reduced, and the balance performance and the speed of the aircraft are higher; (2) air in the outer duct is introduced through the hollow integrated rectifying and mixing support plate and the air film hole, so that the mixing uniformity is improved; (3) the air forms the air film when flowing out from the air film hole, has reduced the temperature that the mixed extension board of integration rectification during operation, utilizes the mixed extension board of integration rectification to the sheltering from of low pressure turbine blade, has realized infrared stealthy.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic view of the assembled relationship of the low pressure turbine blades and the integrated fairing mixing strip.

Fig. 3 is a side schematic view of fig. 2.

FIG. 4 is a schematic diagram of an assembly relationship between an integrated rectifying hybrid support plate and an inner culvert machine brake.

Fig. 5 is a detailed view of section a of fig. 4.

In the figure: 1-combustion chamber cylinder machine brake; 2-inner cylinder; 3-an integrated rectifying and mixing support plate; 4-low pressure turbine blades; 5-containing machine brake; 6-an external duct; 7-air film hole; 8-cone.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

As shown in FIGS. 1 to 5, the structure of the present invention is schematically illustrated:

the invention provides a stealth rotational flow mixing device which comprises a combustion chamber cylinder machine brake 1, an inner cylinder 2, low-pressure turbine blades 4 and an inner culvert machine brake 5, wherein the inner culvert machine brake 5 is arranged in the combustion chamber cylinder machine brake 1, an outer culvert 6 is formed between the inner culvert machine brake 5 and the combustion chamber cylinder machine brake 1, the inner cylinder 2 and the low-pressure turbine blades 4 are arranged in the inner culvert machine brake 5, a plurality of integrated rectifying and mixing support plates 3 are annularly distributed between the inner cylinder 2 and the wall surface of the inner culvert machine brake 5, the integrated rectifying and mixing support plates 3 are positioned at the downstream of the low-pressure turbine blades 4, the integrated rectifying and mixing support plates 3 are of a hollow structure and are communicated with the outer culvert 6, and a plurality of air film holes 7 are distributed on the integrated rectifying and mixing support plates 3.

The principle is as follows: the high-temperature gas in the inner duct forms a flow direction vortex through the low-pressure turbine blades 4 and the integrated rectifying and mixing support plate 3, so that low-temperature air in the outer duct 6 can be sucked conveniently, the low-temperature air firstly enters the hollow integrated rectifying and mixing support plate 3, the integrated rectifying and mixing support plate is cooled, then the low-temperature air flows out of the air film holes 7, and the air and the high-temperature gas are mixed under the action of the flow direction vortex; meanwhile, an air film is formed when air flows out of the air film hole 7, the air film can effectively slow down the temperature rising process of the integrated rectification mixing support plate 3, meanwhile, air flow has a cooling effect on the air film, the integrated rectification mixing support plate 3 is located at the downstream of the low-pressure turbine blade 4, and the integrated rectification mixing support plate 3 is used for shielding the low-pressure turbine blade 4 to realize infrared stealth.

The invention has the following advantages: (1) by the integrated design of the rectification support plate and the mixer, the weight of the engine is reduced, and the balance performance and the speed of the aircraft are higher; (2) air in the outer duct 6 is introduced through the hollow integrated rectifying and mixing support plate 3 and the air film hole 7, so that the mixing uniformity is improved; (3) the air forms the air film when flowing out from the air film hole 7, has reduced the temperature that the mixed extension board of integration rectification 3 during operation, utilizes the mixed extension board of integration rectification 3 to the sheltering from of low pressure turbine blade 4, has realized infrared stealthy.

The longitudinal section of the integrated rectifying mixing support plate 3 is crescent. The cross section of a channel formed between the integrated rectifying and mixing support plates 3 has the change of gradual reduction and gradual expansion along the airflow direction, the propelling effect is improved, and the airflow mixing is more uniform.

The integrated rectifying and mixing support plate 3 is obliquely arranged along the airflow direction, and an attack angle is formed between the integrated rectifying and mixing support plate 3 and the airflow direction. Airflow flows through the integrated rectification mixing support plate 3 with the attack angle to form a vortex, so that the mixing uniformity of the internal and external culvert gases is improved.

The attack angle is 5-15 degrees.

And the two arched surfaces of the integrated rectifying mixed support plate 3 are provided with air film holes 7. Be convenient for mix extension board 3 abundant protection to the integration rectification, improve stealthy effect.

The diameter of the air film hole 7 is 1 mm-2 mm.

The part of the integrated rectification mixing support plate 3 communicated with the outer duct 6 is provided with a gas-leading port which is an inclined plane structure gradually expanding towards the outer duct 6. The air in the outer duct 6 can flow in conveniently, and the air-entraining efficiency is improved.

The downstream end of the inner cylinder 2 is provided with a cone 8. The mixed air flow is convenient to be drained, and a detention area is prevented from being formed.

And air in the outer duct 6 enters the integrated rectifying and mixing support plate 3 and flows out of the air film hole 7, and an air film is formed on the outer surface of the integrated rectifying and mixing support plate 3. The integrated rectifying and mixing support plate is cooled by airflow, the temperature rising process of the integrated rectifying and mixing support plate 3 is slowed down by an air film, and the working temperature of the integrated rectifying and mixing support plate 3 is effectively reduced.

The integrated rectifying mixing support plate 3 completely shields the low-pressure turbine blades 4 in the axial direction. The infrared stealth is convenient to realize.