CN204663701U - A kind of exhaust mixer of turbofan engine - Google Patents
A kind of exhaust mixer of turbofan engine Download PDFInfo
- Publication number
- CN204663701U CN204663701U CN201520129134.3U CN201520129134U CN204663701U CN 204663701 U CN204663701 U CN 204663701U CN 201520129134 U CN201520129134 U CN 201520129134U CN 204663701 U CN204663701 U CN 204663701U
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- flow
- pass air
- air duct
- air
- main duct
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Abstract
The utility model relates to a kind of exhaust mixer of turbofan engine, this mixer is according to the working principle of jet pump, utilize the feature that main duct air-flow is higher than by-pass air duct gas flow temperature, pressure is high, flow velocity is large, with main duct airflow injection by-pass air duct air-flow, increase flow and the energy of by-pass air duct air-flow, reduce the flow velocity of main duct air-flow.The thermal loss taken away by engine exhaust and kinetic energy rejection can use by this mixer, and in motor, energy one timing increase air mass flow and energy, can not only reduce exhaust sound, ensure that the rear pressure of inside and outside culvert air-flow mixing, temperature, velocity ratio are more even; Flow and the energy of outer culvert air can also be increased, improve fan efficiency, improve propulsive efficiency, reduce oil consumption.
Description
Art
The utility model relates to a kind of exhaust mixer of turbofan engine, is applicable to the turbofan engine of all large bypass ratios.
Background technique
At present, mainly contain two losses in the whole process of known air breathing engine acting, one is vented the heat taken away thermal loss, and two are vented the kinetic energy taken away kinetic energy rejection; Known by quality additional principle, when energy in motor one timing, the air mass flow obtaining this part energy is more, and the thrust of motor is larger.
Summary of the invention
In order to the thermal loss taken away by engine exhaust and kinetic energy rejection being used, a timing can increase air mass flow and energy in motor simultaneously, the utility model provides a kind of exhaust mixer, this exhaust mixer can not only reduce exhaust sound, ensures that the rear pressure of inside and outside culvert air-flow mixing, temperature, velocity ratio are more even; The thermal loss taken away in exhaust and kinetic energy rejection can also be used, increase outer flow and the energy of containing air, improve fan efficiency, improve propulsive efficiency, reduce oil consumption.
The utility model solves the technological scheme that its technical problem adopts: because main duct air-flow is higher than by-pass air duct gas flow temperature, pressure is high, flow velocity is large, according to the working principle of jet pump, with main duct airflow injection by-pass air duct air-flow, increase flow and the energy of by-pass air duct air-flow, reduce the flow velocity of main duct air-flow.
Hybrid instrument body structure is made up of the fairing cone of long by-pass air duct, short main duct and jet pipe.Region between position corresponding with main duct spout on fairing cone and main duct spout forms the nozzle of jet pump, the vacuum chamber of jet pump is formed in the inner region corresponding with main duct spout of by-pass air duct, the mixing chamber of jet pump is formed, until the space between by-pass air duct spout is the explosion chamber of jet pump after mixing chamber in the inner region corresponding with fairing cone intermediate portion of by-pass air duct.
High temperature after combustion chambers burn, pressurized gas are after turbine, the nozzle at high speeds formed by main duct spout and fairing cone sprays, low pressure is formed in the vacuum chamber area of by-pass air duct, the air of by-pass air duct is made to accelerate to enter vacuum chamber, then mixing chamber is entered, in mixing chamber the exhaust of high-octane intension with low-energy outer contain to be vented fully mix, energy is changed mutually, speed is also consistent gradually, mixed gas enters explosion chamber from mixing chamber, speed slows down, and pressure gos up, and finally sprays into air by outer culvert spout.
The beneficial effects of the utility model are, can not only reduce exhaust sound, ensure that the rear pressure of inside and outside culvert air-flow mixing, temperature, velocity ratio are more even; The thermal loss taken away during intension can also be utilized to be vented and kinetic energy rejection, to increase flow and the energy of outer culvert air, improve fan efficiency, improve propulsive efficiency, reduce oil consumption.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Accompanying drawing is longitudinal section schematic diagram of the present utility model.
Embodiment
In the accompanying drawings, in firing chamber 2, high temperature, high-pressure gas are after turbine 3, from nozzle 5 ejection at a high speed, low pressure area is formed in the vacuum chamber 6 of by-pass air duct 1, make the air of by-pass air duct 1 accelerate to enter vacuum chamber 6, then enter mixing chamber 7, in mixing chamber 7 exhaust of high-octane intension with low-energy outer contain to be vented fully mix, energy is changed mutually, speed is also consistent gradually, and enter explosion chamber 8 from mixing chamber 7, speed slows down, pressure gos up, and then sprays into air by outer culvert spout.
Claims (5)
1. the exhaust mixer of a turbofan engine, it is characterized in that the jet pump be jointly made up of long by-pass air duct, short main duct and fairing cone, position corresponding with main duct spout on fairing cone and main duct spout form the nozzle of jet pump, in the position that by-pass air duct is inner corresponding with main duct spout, the vacuum chamber of jet pump is formed with main duct spout, form the mixing chamber of jet pump in the inner region corresponding with fairing cone intermediate portion of by-pass air duct, the space after mixing chamber between by-pass air duct spout forms the explosion chamber of jet pump.
2. exhaust mixer according to claim 1, is characterized in that main duct outlet diameter reduces gradually, and main duct outlet longitudinal section radian is slightly larger than the longitudinal section radian of the fairing cone of corresponding position.
3. exhaust mixer according to claim 1, is characterized in that the reduced diameter of position corresponding with main duct spout on by-pass air duct, forms the vacuum chamber of jet pump with main duct spout near zone.
4. exhaust mixer according to claim 1, it is characterized in that the longitudinal section radian size of corresponding part on the longitudinal section radian and fairing cone in inner corresponding with the fairing cone intermediate portion region of by-pass air duct is identical, direction is contrary.
5. exhaust mixer according to claim 1, it is characterized in that outlet port, by-pass air duct internal mix room is to by-pass air duct outlet, the longitudinal section radian of by-pass air duct reduces gradually, until by-pass air duct outlet port longitudinal section angle is reduced to 0 with axis close to radian time parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520129134.3U CN204663701U (en) | 2015-03-02 | 2015-03-02 | A kind of exhaust mixer of turbofan engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520129134.3U CN204663701U (en) | 2015-03-02 | 2015-03-02 | A kind of exhaust mixer of turbofan engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204663701U true CN204663701U (en) | 2015-09-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520129134.3U Expired - Fee Related CN204663701U (en) | 2015-03-02 | 2015-03-02 | A kind of exhaust mixer of turbofan engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204663701U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370432A (en) * | 2016-08-31 | 2017-02-01 | 北京航天三发高科技有限公司 | Ultrasonic engine jet pipe exhaust simulation test exhaust device |
| CN106441915A (en) * | 2016-08-31 | 2017-02-22 | 北京航天三发高科技有限公司 | Air exhaust device for ultrasonic engine jet pipe exhaust simulation experiment |
| CN106441916A (en) * | 2016-08-31 | 2017-02-22 | 北京航天三发高科技有限公司 | Exhaust apparatus for exhaust simulation test of exhaust nozzle of supersonic engine |
| CN106945811A (en) * | 2017-05-15 | 2017-07-14 | 上海理工大学 | Air water system peculiar to vessel based on injection drainage |
| CN107521665A (en) * | 2017-09-08 | 2017-12-29 | 中国民航大学 | Aerial turbo fan engine bilayer " D " shape nozzle |
| CN108087147A (en) * | 2017-11-29 | 2018-05-29 | 中国直升机设计研究所 | A kind of non-homogeneous injection ejector exhaust pipe |
-
2015
- 2015-03-02 CN CN201520129134.3U patent/CN204663701U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370432A (en) * | 2016-08-31 | 2017-02-01 | 北京航天三发高科技有限公司 | Ultrasonic engine jet pipe exhaust simulation test exhaust device |
| CN106441915A (en) * | 2016-08-31 | 2017-02-22 | 北京航天三发高科技有限公司 | Air exhaust device for ultrasonic engine jet pipe exhaust simulation experiment |
| CN106441916A (en) * | 2016-08-31 | 2017-02-22 | 北京航天三发高科技有限公司 | Exhaust apparatus for exhaust simulation test of exhaust nozzle of supersonic engine |
| CN106370432B (en) * | 2016-08-31 | 2018-10-09 | 北京航天三发高科技有限公司 | A kind of exhaust apparatus of supersonic speed nozzle exhaust simulation test |
| CN106441916B (en) * | 2016-08-31 | 2018-11-27 | 北京航天三发高科技有限公司 | A kind of exhaust apparatus of supersonic speed nozzle exhaust simulation test |
| CN106441915B (en) * | 2016-08-31 | 2018-11-27 | 北京航天三发高科技有限公司 | A kind of exhaust apparatus of supersonic speed nozzle exhaust simulation test |
| CN106945811A (en) * | 2017-05-15 | 2017-07-14 | 上海理工大学 | Air water system peculiar to vessel based on injection drainage |
| CN107521665A (en) * | 2017-09-08 | 2017-12-29 | 中国民航大学 | Aerial turbo fan engine bilayer " D " shape nozzle |
| CN108087147A (en) * | 2017-11-29 | 2018-05-29 | 中国直升机设计研究所 | A kind of non-homogeneous injection ejector exhaust pipe |
| CN108087147B (en) * | 2017-11-29 | 2020-07-17 | 中国直升机设计研究所 | Non-uniform injection exhaust nozzle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20180302 |