CN109612739A - A kind of eddy flow centrifugal combustion experimental rig - Google Patents
A kind of eddy flow centrifugal combustion experimental rig Download PDFInfo
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- CN109612739A CN109612739A CN201811360562.1A CN201811360562A CN109612739A CN 109612739 A CN109612739 A CN 109612739A CN 201811360562 A CN201811360562 A CN 201811360562A CN 109612739 A CN109612739 A CN 109612739A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a kind of eddy flow centrifugal combustion experimental rigs, experimental rig is integrally in the tubular of both ends open, the first segment for air entrance including being sequentially communicated, the second segment for firing up, the third section for being used to form swirl flame, the 4th section for centrifugal combustion and the 5th section for gas discharge, it is coaxially connected using flange fastening between each section.The eddy flow centrifugal combustion experimental rig that the present invention provides a kind of good operability, is convenient to mount and dismount, can observe centrifugal combustion flame profile, and measurement centrifugal combustion technical parameter simultaneously optimizes eddy flow centrifugal combustion cell structure parameter.
Description
Technical field
The present invention relates to a kind of aero-engine, ground gas turbine and other there are the burner of swirling eddy, it is special
It is not related to a kind of eddy flow centrifugal combustion experimental rig.
Background technique
With the continuous extension of flying speed and flying area, the performance requirement of engine is increasingly improved, modern high property
Great changes have taken place compared with the early period of combustion chamber for the operating condition of energy aviation combustion chamber: combustion chamber inlet air flow speed is compared with temperature
There is biggish increase before, penetration depth very little of the fuel oil of rapid evaporation in high-speed flow, cannot under high temperature
The blending for promoting fuel oil and air by jet stream, the incendiary source formed in stabilizer tail area after igniting are difficult to pass around
It broadcasts, so that the problems such as combustor exit temperature is unevenly distributed, efficiency of combustion is low is more prominent.
Centrifugal combustion as a kind of novel combustion method, have strengthen oil gas blending, accelerate flame radial propagation,
Efficiency of combustion is improved, reduces chamber length, improve the advantages that combustor exit temperature circumferential direction uniformity, is to solve the above problems
A kind of great potential method.
In order to assess centrifugal combustion technology in the indoor effect of Actual combustion, need to carry out test survey to centrifugal combustion technology
Amount grasps the technical characterstic, rule, and then optimizes the indoor centrifugal combustion organizational form of Actual combustion.But the prior art is also
There is no corresponding eddy flow centrifugal combustion experimental rig, centrifugal combustion technology cannot directly be observed, assess and obtain eddy flow
The optimum structural parameter of centrifugal combustion room.
Summary of the invention
Goal of the invention: the eddy flow centrifugal combustion experimental rig that the present invention provides a kind of good operability, is convenient to mount and dismount, Ke Yiguan
The formation and development of centrifugal combustion flame are examined, centrifugal combustion technical parameter is measured and optimizes eddy flow centrifugal combustion cell structure parameter.
Technical solution: a kind of eddy flow centrifugal combustion experimental rig of the present invention, the eddy flow centrifugal combustion experimental rig
Whole is in the tubular of both ends open, including be sequentially communicated the first segment entered for air, for firing up second segment,
Be used to form the third section of swirl flame, for the 4th section of centrifugal combustion and for the 5th section of gas discharge, each section it
Between using flange fasten it is coaxially connected；
It is provided on the first segment and is opened on intracorporal first fueller of the first segment chamber；
The outer wall of the second segment is divided into the first extension and the second extension, and first extension expands outwardly and edge
Constitute outer Cavity Flame Holder, first extension close to the second extension for being gradually reduced of orient diameter of third section
On be provided with several second fuellers, for adjusting elastic fastening dress between second fueller and the first extension
The igniter set and lighted a fire for the outer Cavity Flame Holder；The second segment is provided with for measuring cavity temperature
The first temperature sensor；
The third intersegmental part is coaxially fixed with fiaring cone and rotating flow cone, and the fiaring cone front end extends to the second segment
Inside, the rotating flow cone rear end extends to the 4th intersegmental part；
5th section of the tail end forms exhaust outlet, and the sampling for acquiring combustion gas sample is provided in described 5th section
Device.
Preferably, the sampler that combustion gas sample is acquired in the present invention is sampling rake, can in order to further measure combustion position
The 4th section of outlet is provided with second temperature sensor simultaneously, the temperature of combustion product and ingredient are measured respectively, obtains
The efficiency of combustion of eddy flow centrifugal combustion.
Preferably, for the first temperature sensor used in the present invention for K-type thermocouple, second temperature sensor is Type B electricity
Thermocouple.
A kind of preferred embodiment of the invention is that second fueller includes oil feed line, is connected to the oil feed line
Swirl atomizer, the fixed swirl atomizer fixing seat, the swirl atomizer is opened on the outer wall of first extension；By
Be thin-wall part in swirl atomizer, its internal structure be highly vulnerable to breakage using welding method, swirl atomizer of the invention and fixing seat it
Between pass through thread seal.For the ease of testing the fuel feeding scheme of different fuel delivery parameters, therefore the second fueller of the invention uses
The form of mechanical engagement is installed.
A kind of preferred embodiment of the invention is that the clamp device includes that one end is located at the pressing plate of the fixing seat upper end, branch
It supports the supporting mechanism of the pressing plate and is installed on the pressing plate other end, for adjusting the pressing plate and fixing seat pine
The regulating mechanism of tight degree；Pressing plate one end close with fixing seat is provided with the groove for engaging the oil feed line.
A kind of preferred embodiment of the invention is that the supporting mechanism includes be fixed on the first extension outer wall first
Nut, the pressing plate through-hole on the pressing plate and one end are fixed with the pressing plate, and the other end is passed through from the pressing plate through-hole
And it is fixed on the first bolt of first nut；The regulating mechanism include pressing plate threaded hole on the pressing plate and
Through the second bolt of the pressing plate.
A kind of preferred embodiment of the invention is that the fixing seat upper end is provided with the groove matched with the pressing plate.
A kind of preferred embodiment of the invention is for several second fuellers along first extension periphery in week
To distribution.
A kind of preferred embodiment of the invention is that first extension is the tubular construction that diameter is greater than first cavity,
The diameter of second extension is gradually reduced along the direction close to third cavity, is in truncated cone-shaped.
A kind of preferred embodiment of the invention is that the fiaring cone includes fixed blade and spreader cone；The rotating flow cone includes rotation
It flows blade and convergence is bored；It is connected through a screw thread between the spreader cone and convergence cone.
It includes several fixed links, quartz glass observation tube that a kind of preferred embodiment of the invention, which is described 4th section, is located at stone
First mounting base and the second mounting base at English glass observation tube both ends.
A kind of preferred embodiment of the invention is that the eddy flow centrifugal combustion experimental rig is provided with support base.
The operation principle of the present invention is that:
(1) gas source provide fresh air enter outer Cavity Flame Holder, with the second fueller spray fuel oil into
Row blending, ignition electric nozzle carries out spark ignition later, and stable flame on duty is formed in outer Cavity Flame Holder；
(2) by the way that after temperature sensor judgment value mottle igneous function, the first fueller starts fuel feeding, and flame on duty is along combustion
It burns swirl flame of the chamber outer wall surface current through being formed when third section and realizes centrifugal combustion with the unburned mixed gas blending in center in the 4th section；
(3) formation and development of centrifugal combustion flame are observed by quartz glass tube, and when the operating condition needed for reaching test,
Utilize the temperature and ingredient of second temperature sensor and combustion gas sampling rake record combustion product.
The utility model has the advantages that (1) the present invention provides a kind of good operability, the eddy flow centrifugal combustion experimental rig being convenient to mount and dismount,
Centrifugal combustion technology can be assessed；(2) present invention meets test to different fuel delivery parameters, different centrifugal acceleration and not
With the demand in centrifugal combustion area, there is the adjustable wide scope experimental condition of multiple parameter variables；(3) present invention sets up hot environment
The observation window of reliable full-annular type quartz glass tube down, can formation to centrifugal combustion flame and development be monitored, and fit
For a variety of laser measuring techniques.
Detailed description of the invention
Fig. 1 is the cross-sectional view of eddy flow centrifugal combustion experimental rig of the present invention；
Fig. 2 is eddy flow centrifugal combustion experimental rig perspective view of the present invention；
Fig. 3 is the structural schematic diagram of the second fueller and clamp device of the invention；
Fig. 4 is fiaring cone of the present invention and rotating flow cone structural schematic diagram；
Fig. 5 is present invention fuel oil Suo Taier diameter test result under different speed of incoming flow；
Fig. 6 is radial temperature profile figure of the present invention in the outlet of different speed of incoming flow lower combustion chamber.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawing.
Embodiment 1: as depicted in figs. 1 and 2, a kind of eddy flow centrifugal combustion experimental rig of the present invention, whole is in two
The tubular of end opening, the first segment 1 for air entrance by being sequentially communicated, are used to form the second segment 2 for firing up
The third section 3 of swirl flame, the 5th section of 5 composition for the 4th section 4 of centrifugal combustion and for gas discharge, between each section
It is fastened using flange coaxially connected.
It is provided on first segment 1 and is opened on intracorporal first fueller 11 of 1 chamber of first segment.
The outer wall of second segment 2 is divided into the first extension 21 and the second extension 22, and the first extension 21 expands outwardly, diameter
Cylindrical greater than the diameter of first segment 1, the diameter of the second extension 22 is gradually reduced along the direction close to third cavity,
In truncated cone-shaped, outer Cavity Flame Holder 23 is collectively formed in the first extension 21 and the second extension 22；Along the first extension
Six the second fuellers 24 of 21 circumferential arrays, fix the clamp device 25 of the second fueller 24, are used for outer cavity flame
Igniter 26 that stabilizer 23 is lighted a fire and judge light a fire whether successful first temperature sensor 27, first in the present embodiment
Temperature sensor is K-type electroheat pair；
As shown in figure 3, the second fueller 24 is by oil feed line 241, the swirl atomizer being connected to oil feed line 241 242
And the fixing seat 243 of fixed swirl atomizer 242 forms；Swirl atomizer 242 is opened on the outer wall of the first extension 21, due to from
Heart nozzle is thin-wall part, is highly vulnerable to breakage its internal structure using welding method, swirl atomizer 242 of the present invention and fixing seat 243 it
Between pass through thread seal.Each second fueller 24 is mating to be provided with clamp device 25, and clamp device 25 fills the second fuel feeding
It sets and is fixed on the first extension 21.Clamp device 25 is made of pressing plate 251, supporting mechanism 252 and regulating mechanism 253；Pressing plate one
End is placed in 243 upper end of fixing seat, is provided with the groove for accommodating oil feed line；Supporting mechanism 252 is located among pressing plate, support
Mechanism 252 is made of the first nut 2521, the first bolt 2522 and pressing plate through-hole 2523, and the first nut is fixed on the first extension
Outer wall, 2522 one end of the first bolt and pressing plate, which are realized, to be fixed, and the other end passes through and fixes to the first spiral shell from pressing plate through-hole 2523
It is female；Regulating mechanism 253 is made of the second bolt 2531 and pressing plate threaded hole 2532 for running through pressing plate, 2531 one end of the second bolt
It is fixed on pressing plate by pressing plate threaded hole 2532, the other end is in contact with the outer wall of the first extension, and screwing the second bolt makes
It obtains pressing plate one end to be jacked up, pressing plate is fulcrum with supporting mechanism 252, while being fixed seat 243 downwards, to realize that second supplies
The fastening of oily device.In order to guarantee that assembly reliability, fixing seat 243 are provided with the groove to fit with pressing plate.Of the invention
Two fuellers 24 and mechanical engagement design between the clamp device 25 of the second fueller 24 is fixed, so that the present invention can root
According to different experiments demand, swirl atomizer is replaced, meets the needs of test is to different fuel delivery parameters, fuel delivery parameters and eddy flow are centrifuged
Matching between optimizes.
As shown in figure 4,3 inside of third section is coaxially fixed with fiaring cone 31 and rotating flow cone 32；Fiaring cone 31 is by four fixations
Blade 311 and spreader cone 312 form, and 311 extending direction of fixed blade is parallel with air flow direction, play rectified action, meanwhile, it is fixed
Spreader cone 312 is fixed on inside third section 3 by blade 311, and 312 front end of spreader cone extends to second segment 2；Rotating flow cone 32 is by eddy flow
322 composition of blade 321 and convergence cone, 322 rear ends of convergence cone extend to inside the 4th section 4；Spreader cone 312 and convergence cone 322 connect
Meeting place has the equal straight sections concentric with 3 outer wall of third section, and circumferential is evenly arranged on of swirl vane 321 is waited on straight sections, swirl vane 321 and
Air flow direction is at an angle, plays a part of to deflect air motion direction.Convergence cone 322 is connected through a screw thread with spreader cone 312, can
To realize the adjusting of swirling number and the air-flow angle of flare by replacement rotating flow cone, meet test to the need of different centrifugal acceleration coefficients
It asks.The present invention can also by exchange second segment 2 and 3 position change centrifugal combustion zone position of third section, meet test to difference from
The demand of mental and physical efforts field distribution.
As shown in Fig. 2, the 4th section 4 includes several fixed links 41, quartz glass observation tube 42, it is located at quartz glass observation tube
First mounting base 43 and the second mounting base 44 at both ends, the 4th section of exit are equipped with second temperature sensor 45, this implementation
Type B thermocouple is used in example.The step surface of 42 both ends of quartz glass observation tube and the first mounting base 43 and the second mounting base 44 into
Row positioning, and fastened by 4 fixed links 41；Quartz glass observation tube 42 can formation to centrifugal combustion flame and development carry out
Monitoring, and it is suitable for a variety of optical measuring techniques, such as particle image velocimeter, laser particle size analyzer, phase Doppler particle
The measuring techniques such as analyzer and planar laser-induced fluorescence.
5th section of 5 tail ends form exhaust outlet 51, and the sampler 52 for acquiring combustion gas sample is provided in the 5th section 5, this
Sampler 52 is combustion gas sampling rake in embodiment.Second temperature sensor 45 and sampler 52 respectively to the temperature of combustion product and
Ingredient measures, and obtains the efficiency of combustion of eddy flow centrifugal combustion.
Eddy flow centrifugal combustion experimental rig of the invention is provided with support base 6, specially the first support base 61 and second
Support base 62, wherein the first support base 61 is fixed on the stationary platform, the second support base 62 is fixed on the slide rail, has axial fortune
Dynamic freedom degree, the first mounting base 43 and the first support base 61 are fixedly mounted, and the second mounting base 44 and the second support base 62 are fixed
Installation, the relative position of adjustable first mounting base 43 and the second mounting base 44, the first support base 61 and the second support base 62
On the one hand matching can be reduced the vibration generated in test, in addition, in addition to facilitating installation, quartz when can also meet ignition temperature increase
The difference of heat distortion amount between glass tube and metal installation base increases quartz glass observation window service life.
Eddy flow centrifugal combustion experimental rig working method of the invention are as follows: the fresh air that gas source generates is from the first of front end
After section enters the present apparatus, after second segment realizes successful ignition, heating, swirl flame is formed in third section, finally the 4th
Outdoor is drained by the 5th section after progress centrifugal combustion in section.
Embodiment 2: the experimental rig of embodiment 1 is used to measure the experimental data of eddy flow centrifugal combustion.
Fig. 5 is equivalent proportion Φ=0.6 and when 0.8 in axis stream and cyclone test operating condition lower combustion chamber under different speed of incoming flow
Fuel oil Sauter mean diameter, equivalent proportion Φ=0.6 and axis stream and cyclone test when 0.8 when Fig. 6 is speed of incoming flow V=60m/s
The radial temperature profile of operating condition lower combustion chamber outlet.As shown in Figure 5 and Figure 6, fuel oil partial size under eddy flow centrifugal condition is smaller, combustion
It is higher to burn temperature, under relative low speeds (V=60m/s), compares axis stream operating condition of test, the oil droplet Suo Taier in cyclone test is average straight
Diameter (SMD) reduces 55%, and ignition temperature increases by 30%.This illustrates that eddy flow centrifugal combustion experimental rig of the present invention can embody eddy flow
Centrifugal combustion technology is strengthening fuel-oil atmozation, enhancing oil gas blending, accelerates flame propagation, improves the advantage in efficiency of combustion, can
Effectively to assess centrifugal combustion technology and be optimized to centrifugal combustion cell structure parameter.
Claims (10)
1. a kind of eddy flow centrifugal combustion experimental rig, which is characterized in that the eddy flow centrifugal combustion experimental rig is integrally in both ends
The tubular of opening, the first segment (1) for air entrance including being sequentially communicated, are used for the second segment (2) for firing up
The third section (3) of formation swirl flame, the 4th section (4) for centrifugal combustion and the 5th section (5) for gas discharge, respectively
It is coaxially connected using flange fastening between section；
It is provided on the first segment (1) and is opened on intracorporal first fueller (11) of the first segment (1) chamber；
The outer wall of the second segment (2) is divided into the first extension (21) and the second extension (22), first extension (21)
It expands outwardly, constitutes outer cavity flame with the second extension (22) being gradually reduced along the orient diameter close to third section (3)
Stabilizer (23) is provided with several second fuellers (24) on first extension (21), supplies for adjusting described second
Between oily device (24) and the first extension (21) elastic clamp device (25) and be used for the outer Cavity Flame Holder
(23) igniter (26) lighted a fire；The second segment (2) is provided with the first temperature sensor for measuring cavity temperature
(27)；
The third section (3) is internal to be coaxially fixed with fiaring cone (31) and rotating flow cone (32), and fiaring cone (31) front end extends
To the inside of the second segment (2), it is internal that rotating flow cone (32) rear end extends to described 4th section (4)；
The tail end of the 5th section (5) forms exhaust outlet (51), is provided in the 5th section (5) for acquiring combustion gas sample
Sampler (52).
2. eddy flow centrifugal combustion experimental rig according to claim 1, which is characterized in that second fueller (24)
Including oil feed line (241), the swirl atomizer (242) being connected to the oil feed line (241) and the fixed swirl atomizer
(242) fixing seat (243), the swirl atomizer are opened on the outer wall of first extension (21).
3. eddy flow centrifugal combustion experimental rig according to claim 2, which is characterized in that the clamp device (25) includes
One end be located at the pressing plate (251) of the fixing seat (243) upper end, the support pressing plate (251) supporting mechanism (252) and
It is installed on the pressing plate (251) other end, for adjusting the pressing plate (251) and the fixing seat (243) elastic adjusting machine
Structure (253)；The pressing plate (251) one end close with fixing seat (243) is provided with for engaging the recessed of the oil feed line (241)
Slot.
4. eddy flow centrifugal combustion experimental rig according to claim 3, which is characterized in that supporting mechanism (252) packet
Include the first nut (2521) for being fixed on the first extension (21) outer wall, the pressing plate through-hole being located on the pressing plate (251)
(2523) and one end is fixed with the pressing plate (251), and the other end passes through and fixes to described from the pressing plate through-hole (2523)
The first bolt (2522) of first nut (2521)；The regulating mechanism (253) includes the pressing plate on the pressing plate (251)
Threaded hole (2532) and the second bolt (2531) for running through the pressing plate (251).
5. eddy flow centrifugal combustion experimental rig according to claim 3, which is characterized in that fixing seat (243) upper end
It is provided with the groove matched with the pressing plate (251).
6. eddy flow centrifugal combustion experimental rig according to claim 1, which is characterized in that several second fuellers
(24) along the first extension (21) periphery in circumferentially distributed.
7. eddy flow centrifugal combustion experimental rig according to claim 1, which is characterized in that first extension (21) is
Diameter is greater than the tubular construction of the first segment (1) diameter, and second extension (22) connects first extension and institute
Third section (3) are stated, are in truncated cone-shaped.
8. eddy flow centrifugal combustion experimental rig according to claim 1, which is characterized in that the fiaring cone (31) includes solid
Fixed blade (311) and spreader cone (312)；The rotating flow cone (32) includes swirl vane (321) and convergence cone (322)；The expansion
It opens and is connected through a screw thread between cone (312) and convergence cone (321).
9. eddy flow centrifugal combustion experimental rig according to claim 1, which is characterized in that the 4th section (4) are if include
Solid fixed pole (41), quartz glass observation tube (42), be located at quartz glass observation tube (42) both ends the first mounting base (43) with
And second mounting base (44).
10. -9 any eddy flow centrifugal combustion experimental rig according to claim 1, which is characterized in that the eddy flow centrifugation combustion
It burns experimental rig and is provided with support base (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811360562.1A CN109612739B (en) | 2018-11-15 | 2018-11-15 | Rotational flow centrifugal combustion test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811360562.1A CN109612739B (en) | 2018-11-15 | 2018-11-15 | Rotational flow centrifugal combustion test device |
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| Publication Number | Publication Date |
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| CN109612739A true CN109612739A (en) | 2019-04-12 |
| CN109612739B CN109612739B (en) | 2020-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811360562.1A Active CN109612739B (en) | 2018-11-15 | 2018-11-15 | Rotational flow centrifugal combustion test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19946045C1 (en) * | 1999-09-25 | 2001-06-13 | Daimler Chrysler Ag | Automobile internal combustion engine testing method, involves detecting air flow through air inlet channels for each cylinder bore during rotation of engine crankshaft via electric motor |
| CN203849024U (en) * | 2014-05-07 | 2014-09-24 | 华中科技大学 | Whirl combustion chamber experiment device |
| CN108253456A (en) * | 2017-12-29 | 2018-07-06 | 南京航空航天大学 | A kind of swirl afterburner based on outer cavity |
| CN108386871A (en) * | 2018-01-10 | 2018-08-10 | 成都航利航空科技有限责任公司 | A kind of adjustable engine centrifugal formula fuel nozzle of flow |
| CN108414231A (en) * | 2018-06-07 | 2018-08-17 | 湖南云顶智能科技有限公司 | Modular trial device for swirl flow combustion thermal acoustic oscillation characteristic research |
-
2018
- 2018-11-15 CN CN201811360562.1A patent/CN109612739B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19946045C1 (en) * | 1999-09-25 | 2001-06-13 | Daimler Chrysler Ag | Automobile internal combustion engine testing method, involves detecting air flow through air inlet channels for each cylinder bore during rotation of engine crankshaft via electric motor |
| CN203849024U (en) * | 2014-05-07 | 2014-09-24 | 华中科技大学 | Whirl combustion chamber experiment device |
| CN108253456A (en) * | 2017-12-29 | 2018-07-06 | 南京航空航天大学 | A kind of swirl afterburner based on outer cavity |
| CN108386871A (en) * | 2018-01-10 | 2018-08-10 | 成都航利航空科技有限责任公司 | A kind of adjustable engine centrifugal formula fuel nozzle of flow |
| CN108414231A (en) * | 2018-06-07 | 2018-08-17 | 湖南云顶智能科技有限公司 | Modular trial device for swirl flow combustion thermal acoustic oscillation characteristic research |
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| CN109612739B (en) | 2020-03-10 |
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