CN114060852A - Double-cavity type premixing flame accelerating device - Google Patents
Double-cavity type premixing flame accelerating device Download PDFInfo
- Publication number
- CN114060852A CN114060852A CN202111367627.7A CN202111367627A CN114060852A CN 114060852 A CN114060852 A CN 114060852A CN 202111367627 A CN202111367627 A CN 202111367627A CN 114060852 A CN114060852 A CN 114060852A
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- cavity
- double
- flame
- pipeline
- chamber
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Links
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 239000004071 soot Substances 0.000 claims abstract description 7
- 230000001133 acceleration Effects 0.000 claims description 13
- 238000009423 ventilation Methods 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 4
- 230000000171 quenching effect Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 2
- 238000005474 detonation Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 238000002485 combustion reaction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000376 reactant Substances 0.000 abstract description 4
- 230000007704 transition Effects 0.000 abstract description 2
- 230000008033 biological extinction Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 6
- 238000004200 deflagration Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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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
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
- F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
- F23L17/14—Draining devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/007—Regulating fuel supply using mechanical means
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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
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a double-cavity type premixing flame accelerating device which comprises a base, a double-cavity type pipeline arranged on the base, and a premixing assembly, a soot blowing assembly and an igniter which are respectively connected to the double-cavity type pipeline; the double-cavity pipeline comprises an outer cavity and an inner cavity which is positioned in the outer cavity and is coaxially arranged with the outer cavity, the inner cavity is provided with a through hole communicated with the outer cavity, and the outer cavity and the inner cavity are positioned on the same wall surface of the double-cavity pipeline. Its structure is reliable, high performance, the exocoel and the inner chamber structure through double-chamber formula pipeline and the connecting channel of through-hole, the existence of through-hole is guaranteed flame and can not take place the extinction of continuation when touching the wall, the flame of inner chamber also can ignite the gas of not burning in the through-hole afterwards, effectual delay burning makes the exocoel continuously provide fresh reactant to the inner chamber, it has the promotion effect to flame propagation, realize that ultrafast flame accelerates and continuously be the exponential form with higher speed, produce the high-pressure wave, promote the transition of flame propagation process by detonation to detonation, improve combustion effects.
Description
Technical Field
The invention relates to the technical field of combustion, in particular to a double-cavity type premixed flame accelerating device.
Background
The explosion propagation process of the premixed combustible gas in the limited space is the basic content of explosion hazard research, and a large number of scholars have developed research aiming at the explosion characteristics of the premixed combustible gas in the limited space. The acceleration propagation and explosion process of premixed flames in a limited space is a much more concerned problem, for the flame propagation process in a general limited space, the flame speed is increased due to external turbulence or internal flame instability, but the working time interval of the acceleration mechanism is short, the conversion from deflagration to detonation is unlikely to be generated under normal conditions, if the deflagration to detonation process can be reasonably applied, the flame speed is increased, the pressure rise in the combustion process is promoted, and higher energy is generated to be used as the power energy source of other engineering equipment. Many hazards are generated to the uncontrollable detonation process, for example, the detonation can cause the engine to be overheated, the power is reduced, the oil consumption is increased, the service life of the engine can be greatly shortened, and mechanical equipment can be damaged and people can be injured in other engineering applications. Therefore, understanding and applying the mechanism of premixed flame acceleration is of great importance to engineering issues in this regard. The existing flame accelerating device can not realize an ultra-fast flame accelerating process and a continuous exponential accelerating process and can not quickly realize the conversion from deflagration to detonation.
Disclosure of Invention
In order to solve the technical problem, the invention provides a double-cavity type premixing flame accelerating device.
The technical scheme for solving the technical problems is as follows: a double-cavity type premixing flame accelerating device comprises a base, a double-cavity type pipeline arranged on the base, and a premixing assembly, a soot blowing assembly and an igniter which are respectively connected to the double-cavity type pipeline;
the double-cavity pipeline comprises an outer cavity and an inner cavity which is positioned in the outer cavity and is coaxially arranged with the outer cavity, the inner cavity is provided with a through hole communicated with the outer cavity, and the outer cavity and the inner cavity are positioned on the same wall surface of the double-cavity pipeline.
Further, the premixing component comprises a gas storage tank, a premixing pipeline connected between the gas storage tank and the outer cavity, and a safety valve, a flow meter and a gas distribution valve which are respectively arranged on the premixing pipeline, wherein the safety valve, the flow meter and the gas distribution valve are sequentially arranged along the gas flowing direction.
Further, the soot blowing assembly comprises a fan, a ventilation pipeline arranged between the fan and the outer cavity and a ventilation valve arranged on the ventilation pipeline.
Further, the diameter of the through-hole is larger than the flame quenching diameter.
Further, the outer cavity is arranged on the base through a universal coupling.
Further, the through-holes are evenly distributed on the inner cavity.
Further, a pressure gauge is arranged on the outer cavity.
The invention has the following beneficial effects: the double-cavity premixed flame accelerating device provided by the invention has a reliable structure and good service performance, after premixed gas is ignited, flame can be spread very quickly in the inner cavity, through the outer cavity and inner cavity structures of the double-cavity pipeline and the connecting channel of the through hole, the existence of the through hole ensures that the flame cannot be continuously extinguished when contacting the wall, then the flame in the inner cavity can also ignite unburnt gas in the through hole, effectively delay combustion enables the outer cavity to continuously provide fresh reactants for the inner cavity, has a promoting effect on flame spread, realizes ultra-fast flame acceleration and continuous exponential acceleration, generates high-pressure waves, promotes the conversion of the flame spread process from deflagration to detonation, and can remove dust and tail gas after combustion in the cavity; a base with a universal coupling is connected below the double-cavity pipeline, so that the position and the direction of the device can be conveniently adjusted; a pressure gauge is connected above the double-cavity pipeline, so that the pressure change in the pipeline can be monitored in real time conveniently; the end part of the pipeline is connected with a high-energy igniter for igniting premixed gas, a gas storage tank with a safety valve is arranged, and a flow meter and a gas distribution valve are arranged between the gas storage tank and the premixed pipeline; the fan and the ventilation valve are also arranged at the interface of the end part of the pipeline, which is helpful for improving the effect of removing dust and tail gas after combustion.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a double-cavity type premixed flame accelerating device comprises a base 1, a double-cavity type pipeline 2 arranged on the base 1, and a premixing assembly 3, a soot blowing assembly 4 and an igniter 5 which are respectively connected to the double-cavity type pipeline 2. The premixing assembly 3 is used for providing premixed gas to the interior of the double-cavity type pipeline 2, the igniter 5 is used for igniting the premixed gas, and the soot blowing assembly 4 is used for removing dust and tail gas after combustion. The pressure gauge 24 is connected above the outer cavity 20 of the double-cavity pipeline 2, so that the change of the pressure in the pipeline can be monitored in real time. The outer cavity 20 is arranged on the base 1 through a universal coupling 23, so that the position and the direction of the device can be conveniently adjusted.
The double-cavity pipeline 2 comprises an outer cavity 20 and an inner cavity 21 which is positioned inside the outer cavity 20 and is coaxially arranged with the outer cavity 20, the outer cavity 20 and the inner cavity 21 are both inner cavities, two ends of the outer cavity 20 and the inner cavity 21 are sealed structures, the outer cavity 20 and the inner cavity 21 have high strength and can bear larger impact, a through hole 22 communicated with the outer cavity 20 is formed in the inner cavity 21, and the outer cavity 20 and the inner cavity 21 are positioned on the same wall surface of the double-cavity pipeline 2. The through holes 22 are cylindrical structures and are consistent in size and size, the through holes are uniformly formed in the inner cavity 21, flame can reliably and quickly penetrate through the through holes, when flame starts to propagate, because the diameter of the through holes 22 is larger than the quenching diameter, quenching phenomenon cannot occur after the flame touches the wall, the through holes 22 are used as connecting channels between the outer cavity 20 and the inner cavity 21, the outer cavity 20 can continuously provide fresh reactants for the inner cavity 21, the flame propagation is promoted, ultra-fast flame acceleration and continuous exponential acceleration are realized, high-pressure waves are generated, the flame propagation process is promoted to be changed from deflagration to detonation, dust and tail gas after combustion in the cavity can be removed, and the device can be used for clearly researching carbon deposition in an engine. The pressure gauge 24 is connected above the double-cavity pipeline 2, so that the change of the internal pressure of the pipeline can be monitored in real time conveniently.
The premixing assembly 3 comprises an air tank 30, a premixing pipeline 31 connected between the air tank 30 and the outer cavity 20, and a safety valve 32, a flow meter 33 and a gas distribution valve 34 which are respectively arranged on the premixing pipeline 31, wherein the safety valve 32, the flow meter 33 and the gas distribution valve 34 are sequentially arranged along the gas flowing direction. The gas in the gas container 30 is sucked into the double-chamber type pipe 2 through the premix pipe 31, and the flow rate of the introduced gas is regulated by the relief valve 32, the flow meter 33 and the gas distribution valve 34.
The sootblowing assembly 4 includes a fan 40, a vent conduit 41 disposed between the fan 40 and the outer chamber 20, and a vent valve 42 disposed on the vent conduit 41. The blower 40 blows air into the tube, which helps to improve the effect of removing dust and tail gas after combustion.
When using, carry out sealing connection with each part, the manometer 24 has been debugged, constitute flame acceleration structure, adjust flowmeter 33 subsequently and indicate, open relief valve 32 and distribution valve 34, let in gas and finish the back, close each valve, then start igniter 5, the burning of igniteing, make exocoel 20 can continuously provide fresh reactant to inner chamber 21, have the facilitating action to flame propagation, realize that ultrafast flame accelerates and continuously be exponential form with higher speed, produce the high-pressure wave, promote the transition of flame propagation process by detonation to detonation, and start fan 40, open ventilation valve 42, discharge explosion dust and tail gas.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A double-cavity type premixing flame accelerating device is characterized by comprising a base (1), a double-cavity type pipeline (2) arranged on the base (1), and a premixing component (3), a soot blowing component (4) and an igniter (5) which are respectively connected to the double-cavity type pipeline (2);
the double-cavity pipeline (2) comprises an outer cavity (20) and an inner cavity (21) which is positioned in the outer cavity (20) and is coaxial with the outer cavity (20), a through hole (22) communicated with the outer cavity (20) is formed in the inner cavity (21), and the outer cavity (20) and the inner cavity (21) are positioned on the same wall surface of the double-cavity pipeline (2).
2. The dual-chamber premixed flame acceleration device of claim 1, wherein the premixing assembly (3) comprises an air tank (30), a premixing pipe (31) connected between the air tank (30) and the outer chamber (20), and a safety valve (32), a flow meter (33) and a gas distribution valve (34) respectively arranged on the premixing pipe (31), and the safety valve (32), the flow meter (33) and the gas distribution valve (34) are arranged in sequence along the gas flowing direction.
3. The dual-chamber premixed flame acceleration device of claim 1, characterized by, that the soot blowing assembly (4) comprises a fan (40), a ventilation duct (41) disposed between the fan (40) and the outer chamber (20), and a ventilation valve (42) disposed on the ventilation duct (41).
4. A dual chamber premixed flame accelerating device according to any of claims 1 to 3, wherein the diameter of the through hole (22) is larger than the flame quenching diameter.
5. The dual-chamber premixed flame acceleration device of claim 4, characterized by, that the outer chamber (20) is set on the base (1) through a universal joint (23).
6. The twin-chamber premixed flame acceleration device of claim 5, characterized by that, the through holes (22) are evenly distributed on the inner chamber (21).
7. The dual chamber premixed flame acceleration device of claim 5, characterized by, that, on said outer chamber (20) is provided a pressure gauge (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367627.7A CN114060852A (en) | 2021-11-18 | 2021-11-18 | Double-cavity type premixing flame accelerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367627.7A CN114060852A (en) | 2021-11-18 | 2021-11-18 | Double-cavity type premixing flame accelerating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114060852A true CN114060852A (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111367627.7A Pending CN114060852A (en) | 2021-11-18 | 2021-11-18 | Double-cavity type premixing flame accelerating device |
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| Country | Link |
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|---|---|---|---|---|
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| US20130139487A1 (en) * | 2011-12-01 | 2013-06-06 | General Electric Company | Variable initiation location system for pulse detonation combustor |
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-
2021
- 2021-11-18 CN CN202111367627.7A patent/CN114060852A/en active Pending
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| CN109209678A (en) * | 2018-09-18 | 2019-01-15 | 西北工业大学 | A kind of pulse-knocking propulsion device based on re-generatively cooled structure |
| CN109578168A (en) * | 2018-11-08 | 2019-04-05 | 西北工业大学 | A kind of air-breathing pulse detonation engine combustion chamber wall surface cooling scheme |
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Application publication date: 20220218 |
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