CN109340819A - A kind of venturi apparatus enhancing atomizing effect - Google Patents
A kind of venturi apparatus enhancing atomizing effect Download PDFInfo
- Publication number
- CN109340819A CN109340819A CN201811165525.5A CN201811165525A CN109340819A CN 109340819 A CN109340819 A CN 109340819A CN 201811165525 A CN201811165525 A CN 201811165525A CN 109340819 A CN109340819 A CN 109340819A
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- CN
- China
- Prior art keywords
- venturi
- throat
- wall
- atomizing effect
- curved cavity
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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
-
- 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
Abstract
The present invention provides a kind of venturi apparatus for enhancing atomizing effect, it is characterised in that: in the circumferential regular curved cavity of rationally arranging of venturi throat inner wall, expansion segment takes wave to design.It rationally arranges regular curved cavity in venturi throat inner wall, fuel oil is ejected into throat through swirl atomizer, and forms oil film, and when the liquid film of high speed flows through throat, complete liquid film will be disturbed, can effectively facilitate the broken atomization of drop in this way.Expansion segment takes wave to design, which passes through rough inner wall, it will be apparent that strengthens the disturbance flowed in Venturi tube, enhances blending, strengthen turbulent extent, improve the effect of atomization.The present invention not only forms stable recirculating zone by the Curve guide impeller to Venturi tube under lesser flow losses, it is ensured that organizes the stability of burning, and can significantly improve the atomization characteristics of swirl combustion chamber.
Description
Technical field
The invention belongs to gas-turbine unit fields, and in particular to a kind of Venturi tube of high efficiency fuel atomization.
Background technique
Modern aeroengine requires the good characteristic of high temperature rise, low emission.Burning of the liquid fuel in engine
Process can be summarized simply as follows two steps: evaporating atomization after being sprayed by nozzle, burn again later.GE company of the U.S. is by inside and outside
The structure of 5 part compositions such as cyclone, Venturi tube, nozzle and sleeve is known as eddy flow cup, and eddy flow cup is aeroplane engine owner combustion
Burn the important component for stablizing flame in room.In eddy flow cup, Venturi tube is the first contraction for being similar to Rafael nozzle
The round pipe fitting expanded afterwards, main function are the atomizations in order to improve fuel oil, prevent fuel gas return-flow to nozzle, prevent ablation and
Carbon distribution.The working principle of Venturi tube is: nozzle ejects fuel oil, and oil film, oil film fair current to Venturi tube lip are formed on Venturi tube
Mouth realizes atomization by the air shearing of double cyclone, and air and the atomized fuel of double cyclone are mixed to form uniform flammable
Mixed gas, subsequently enters burner inner liner combustion zone and carries out tissue burning.Due to the presence of eddy flow cup, fuel oil can be in fire after eddy flow cup
Flame cylinder head generates high speed rotation jet stream, and is formed centrally within low-pressure area, to form Central backflow area.Recirculating zone one side energy
Guarantee that flame is in stable state, promote fuel oil ignition, on the other hand has to the blending of fuel-oil atmozation and oil gas important
Effect.
Mixed air-flow that aeroengine combustor buring chamber interior is flammable speed is fast, residence time is short, therefore wants to the atomization quality of fuel oil
Ask very high.At present in terms of the research of Venturi tube is concentrated mainly on the geometric parameter of Venturi tube, such as throat diameter, expansion half
Angle, shrinkage ratio etc., and the rare research of influence about Venturi tube self structure for fuel atomization.
In previous result of study, find in terms of fuel-oil atmozation presently, there are main problem be: fuel-oil atmozation
Granularity is not fine enough, and mist of oil field distribution is uneven.These problems will will lead to subsequent burning and be not enough, pollutant in tail gas
Discharge increases, the reduced performance of combustion chamber.The present invention has great application value for the development of high-performance aeroengine.
This venturi apparatus for enhancing atomizing effect is atomized using pre- film, and atomization quality is good；Curved cavity and wave structure
Presence increase the disturbance of fuel liquid film, enhance atomizing effect, and structure design is simple, it is easy to process, have good answer
Use prospect.
Summary of the invention
The technical problem to be solved by the present invention is to propose it is a kind of enhance atomizing effect venturi apparatus and by the Wen
The flame tube head of pipe composition and combustion chamber.Venturi tube contraction section inner wall in the present invention is arc transition, and throat circumferentially designs
There is evenly distributed curved cavity, expansion segment is wave structure.By nozzle be ejected into the oil film on Venturi tube by throat with
And expansion segment, due to the presence of cavity and wave structure, oil film can undergo multiple disturbance so that deformation of the oil film, unstability,
Thickness is thinning, kinetic energy increases, and is conducive to broken atomization.Therefore the present invention is conducive to enhance the atomizing effect of fuel oil.
Technical solution
The purpose of the present invention is to provide a kind of venturi apparatus for enhancing atomizing effect.
Technical solution of the present invention is as follows:
A kind of venturi apparatus enhancing atomizing effect, it is characterised in that: in the circumferential rationally arrangement of venturi throat inner wall
Regular curved cavity, expansion segment take wave to design.
The venturi apparatus of a kind of enhancing atomizing effect, it is characterised in that: circumferentially closed in venturi throat inner wall
The regular curved cavity of reason arrangement, curved cavity depth are 0.8mm~3mm, and width is 0.8mm~3mm, radial ringed distribution
Quantity is 25~60, and specific depth and width should be designed according to the specific size of Venturi tube, and annular spread quantity also answers root
Reasonable distribution is carried out according to venturi tube diameter.It can be adopted in the curved cavity of venturi throat inner wall design when number of rows is more than a row
Take the arrangement mode of fork row and in-line arrangement；In the curved cavity of venturi throat inner wall arrangement, can be designed as according to the actual situation
The irregular shapes such as circle, triangle, trapezoidal, are desirably to obtain best effect
The venturi apparatus of a kind of enhancing atomizing effect, it is characterised in that: expansion segment is designed using wave, tool
The ripple parameter of body can be designed as the regular shapes such as irregular conic section and sine, cosine curve according to the actual situation.
The venturi apparatus of a kind of enhancing atomizing effect, it is characterised in that: Venturi tube can match with single-stage cyclone
It closes, can also cooperate with Multi-stage spiral device and constitute gas-turbine combustion chamber head.Specific structural parameters can during cooperation
Reasonable adjustment is made according to actual requirement.
The invention has the following advantages:
Curved cavity is used for throat, expansion segment uses the Venturi tube of wave design, and fuel oil is sprayed through swirl atomizer
Oil film is formed on to Venturi tube inner wall, the curved cavity of venturi throat and the ripple of expansion segment are flowed through when the oil film of high speed
When structure, complete liquid film meeting multilated, the position in reasonable arrangement hole can promote the high-efficient atomizing of drop, so that drop size
More evenly, thickness is thinner, when oil film moves to the Gas Mixing in Cross flow of venturi outlet and second cyclone, it is easier to broken mist
Change, this is highly beneficial for the performance boost of combustion chamber.
Detailed description of the invention
Fig. 1: Venturi tube overall schematic；
Fig. 2: the schematic three dimensional views of Venturi tube and cyclone cooperation；
Fig. 3: Venturi tube main view；
Fig. 4: Venturi tube cross-sectional view.
Main element symbol description:
Venturi tube 1, cyclone 2, curved cavity 3, wave structure 4, sleeve 5.
Specific embodiment
Now in conjunction with attached drawing, the invention will be further described:
In conjunction with Fig. 1, the present invention provides a kind of new venturi apparatus that atomizing effect can be enhanced.
Detailed process: fuel oil is ejected on Venturi tube inner wall through swirl atomizer and forms oil film, when the oil film of high speed flows through
When the ripple struction of the curved cavity of venturi throat and expansion segment, complete liquid film can multilated, the position in reasonable arrangement hole
The high-efficient atomizing that can promote drop is set, so that drop size is more evenly, thickness is thinner, when oil film moves to venturi outlet
When with the Gas Mixing in Cross flow of second cyclone, it is easier to broken atomization.Oil film meeting multilated when by the cavity of throat is original
Flow regime, turbulivity enhancing cause liquid film by external bigger deformation force so that small holes occurs in inside, with flowing
Progress, hole is increasing, ultimately forms ribbon notch；Later when by expansion segment ripple struction, flowed in contraction place
Speed increases, and flow velocity reduces at expansion, strengthens gas-liquid mixed effect, enhances atomizing effect.
Compared with conventional venturi tube, the present invention be for the broken atomization of fuel oil it is considerably advantageous, for modern Aviation send out
For motivation, good atomization field is the important indicator for embodying chamber performance, its efficiency of combustion for combustion chamber, pollutant
Discharge and Exit temperature distribution have actively and important role.
Claims (5)
1. a kind of venturi apparatus for enhancing atomizing effect, it is characterised in that: be circumferentially rationally placed in venturi throat inner wall
The curved cavity of rule, expansion segment take wave to design.
2. a kind of venturi apparatus for enhancing atomizing effect according to claim 1, it is characterised in that: in venturi throat
Inner wall is rationally circumferentially arranged regular curved cavity, and curved cavity depth is 0.8mm~3mm, and width is 0.8mm~3mm, diameter
It is 25~60 to annular spread quantity, specific depth and width should be designed according to the specific size of Venturi tube, annular spread
Quantity also should carry out reasonable distribution according to venturi tube diameter.
3. a kind of venturi apparatus for enhancing atomizing effect according to claim 1 or 2, it is characterised in that: expansion segment is adopted
It is designed with wave, specific ripple parameter can be designed as irregular conic section according to the actual situation and sine, cosine are bent
The regular shapes such as line.
4. according to claim 1 to a kind of venturi apparatus of enhancing atomizing effect described in 3, it is characterised in that: in Venturi tube
The curved cavity of throat's inner wall design can take the arrangement mode of fork row and in-line arrangement when number of rows is more than a row；In Venturi tube larynx
The curved cavity of portion's inner wall arrangement, can be designed as the irregular shapes such as circle, triangle, trapezoidal according to the actual situation, to
Obtain best effect.
5. a kind of venturi apparatus for enhancing atomizing effect according to claim 1,2,3 or 4, it is characterised in that: Wen
The cooperation of Guan Keyu double cyclone, can also cooperate with three swirler device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811165525.5A CN109340819A (en) | 2018-10-08 | 2018-10-08 | A kind of venturi apparatus enhancing atomizing effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811165525.5A CN109340819A (en) | 2018-10-08 | 2018-10-08 | A kind of venturi apparatus enhancing atomizing effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109340819A true CN109340819A (en) | 2019-02-15 |
Family
ID=65308667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811165525.5A Pending CN109340819A (en) | 2018-10-08 | 2018-10-08 | A kind of venturi apparatus enhancing atomizing effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109340819A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915857A (en) * | 2019-02-28 | 2019-06-21 | 西北工业大学 | A kind of new combustion chamber head |
| CN112146126A (en) * | 2020-09-24 | 2020-12-29 | 常熟理工学院 | Combined type atomized oil injection structure of air-breathing detonation engine |
| CN114688524A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Wave-shaped pre-film type gas-assisted atomizing nozzle with boss |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676647A (en) * | 2014-12-15 | 2015-06-03 | 西北工业大学 | Venturi apparatus for strengthening liquid-membrane crushing effect |
| CN204730249U (en) * | 2015-03-18 | 2015-10-28 | 浙江大学 | A kind of swirl combustion chamber head construction being provided with perforating Venturi tube |
| CN105422285A (en) * | 2015-11-27 | 2016-03-23 | 西北工业大学 | Micro-engine wave-type fuel-oil evaporating tube |
| 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 |
-
2018
- 2018-10-08 CN CN201811165525.5A patent/CN109340819A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676647A (en) * | 2014-12-15 | 2015-06-03 | 西北工业大学 | Venturi apparatus for strengthening liquid-membrane crushing effect |
| CN204730249U (en) * | 2015-03-18 | 2015-10-28 | 浙江大学 | A kind of swirl combustion chamber head construction being provided with perforating Venturi tube |
| CN105422285A (en) * | 2015-11-27 | 2016-03-23 | 西北工业大学 | Micro-engine wave-type fuel-oil evaporating tube |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915857A (en) * | 2019-02-28 | 2019-06-21 | 西北工业大学 | A kind of new combustion chamber head |
| CN112146126A (en) * | 2020-09-24 | 2020-12-29 | 常熟理工学院 | Combined type atomized oil injection structure of air-breathing detonation engine |
| CN112146126B (en) * | 2020-09-24 | 2021-11-12 | 常熟理工学院 | Combined type atomized oil injection structure of air-breathing detonation engine |
| CN114688524A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Wave-shaped pre-film type gas-assisted atomizing nozzle with boss |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20190215 |