CN116085825A - Mutual impact type air hydrogen torch igniter - Google Patents
Mutual impact type air hydrogen torch igniter Download PDFInfo
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- CN116085825A CN116085825A CN202310219310.1A CN202310219310A CN116085825A CN 116085825 A CN116085825 A CN 116085825A CN 202310219310 A CN202310219310 A CN 202310219310A CN 116085825 A CN116085825 A CN 116085825A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
- F23Q3/008—Structurally associated with fluid-fuel burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/78—Cooling burner parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2207/00—Ignition devices associated with burner
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention belongs to the technical field of combustion and ignition, and discloses a mutual impact type air-hydrogen torch igniter. The combustion chamber of the mutual impact type air-hydrogen torch igniter is a cylinder; the front end of the combustion chamber is fixed with an injector through a flange plate, and a hydrogen nozzle is arranged on the injector; the middle section is provided with spark plug mounting seats which are vertically symmetrical, the spark plugs are respectively inserted into the spark plug mounting seats, and the spark plugs are externally connected with an ignition cabinet; the rear section is connected with a pressure measuring joint; the rear end is inserted into the fire transmission rod; the horizontal central axes of the hydrogen nozzle, the injector, the combustion chamber and the fire transfer rod are provided with air flow channels which are communicated from front to back. The mutual impact type air-hydrogen torch igniter enhances the mixing of air and hydrogen, and the gas temperature is controlled by adjusting the equivalent ratio of the hydrogen to the air so as to realize reliable ignition; the long-time work is realized by adopting an air and hydrogen combustion organization mode; the working time is prolonged through the air film cooling circular seam; the fire transmission rod adopts high-temperature alloy to realize long-time work and repeated work of the torch igniter.
Description
Technical Field
The invention belongs to the technical field of combustion and ignition, and particularly relates to a mutual impact type air-hydrogen torch igniter.
Background
Combustion equipment such as liquid rocket engines, air heaters and the like all need to consider the problem of reliable ignition. Common ignition modes include powder ignition, spark ignition, and torch igniter ignition. The powder ignition structure is simple, the work is reliable, but the powder ignition structure can only be used once, and is obviously not applicable to ground combustion heating equipment which needs to be used repeatedly and run for a long time. Spark ignition is also a convenient ignition mode, but ignition energy is low, and ignition reliability of high-flow combustion equipment is difficult to ensure. The torch igniter has the advantages of high ignition reliability, reusability, convenient use and the like, and is widely applied to ignition of liquid rocket engines and combustion air heaters. Torch igniters typically use gaseous or liquid fuels, typically hydrogen, methane, etc., and most of the latter are alcohols, coal oils, etc.
The ignition reliability of the torch igniter is improved, the ignition energy is improved, and oxygen can be selected as an oxidant of the torch igniter. The oxygen-hydrogen torch igniter generally adopts a coaxial shear type injection structure, and has simple configuration and high reliability. The oxidant selects oxygen, the injector can meet the requirement of reliable ignition without considering a complex configuration, but the flame temperature of oxygen and hydrogen is higher than 3000K, a torch igniter can only work for hundreds of milliseconds, and the successful ignition of a combustion device cannot be ensured due to the short working time; and the installation position of the torch igniter in the combustion device is usually narrow, and the addition of a cooling structure on the torch igniter is inconvenient. At the same time, oxygen is a very dangerous combustion-supporting gas, and the use of oxygen greatly increases the risk of the supply system.
If air is used as the oxidant, the temperature of the gas generated by the torch igniter can be controlled within 2000K, and the operating time of the torch igniter can be prolonged to 5s without taking cooling measures, so that the reliable ignition of the combustion device can be ensured. However, the coaxial shear nozzle cannot ensure adequate mixing of the gaseous fuel with air and the ignition stability. Taking the combination of air and hydrogen as an example, under the condition that the hydrogen and static air are properly mixed, the required ignition temperature is 530-590 ℃, and many air-hydrogen torch igniters adopting coaxial shearing injection or wall injection are difficult to ignite, so that the working stability is poor.
The gas-liquid combustion tissue mode torch igniter generally adopts a gas-liquid coaxial centrifugal injection structure, and although the combustion of liquid fuel can be realized by reasonably designing a nozzle structure, the liquid fuel combustion process involves complex processes of atomization, evaporation and blending, and the ignition reliability and the combustion stability are poor. The liquid fuel mode is easy to generate oscillation combustion, greatly threatens the safety of equipment, and is a worldwide difficult problem which is not solved up to now.
In summary, although the torch igniter using oxygen as the oxidant has reliable ignition and high ignition energy, the torch igniter has short working time and high risk; the problems of ignition reliability and combustion stability of liquid fuels are difficult to solve, and currently, there is a need to develop a mutual impact type air-hydrogen torch igniter capable of reliably igniting and stably working.
Disclosure of Invention
The invention aims to solve the technical problem of providing the mutually-striking air-hydrogen torch igniter capable of stably working for a long time, so that the problem of mixing and burning of gaseous fuel and air is well solved, and the mutually-striking air-hydrogen torch igniter can stably work for a long time.
The invention relates to a mutual impact type air-hydrogen torch igniter, which is characterized in that a combustion chamber of the mutual impact type air-hydrogen torch igniter is a cylinder; the front end of the combustion chamber is provided with a flange plate I, an injector is fixed through the flange plate I, the injector is externally connected with a hydrogen nozzle, and a hydrogen inlet is arranged on the hydrogen nozzle; the middle section of the combustion chamber is provided with spark plug mounting seats which are vertically symmetrical, the spark plugs are respectively inserted into the spark plug mounting seats, and the spark plugs are externally connected with an ignition cabinet; the rear section of the combustion chamber is connected with a pressure measuring joint; the rear end of the combustion chamber is provided with a flange II, and the rear end of the combustion chamber is also inserted with a fire transmission rod; the hydrogen nozzle, the hydrogen inlet, the injector, the combustion chamber and the fire transmission rod are the same as the horizontal central axis, the horizontal central axis is provided with a front-back through airflow channel, and the airflow channels at the middle section and the rear section of the combustion chamber are combustion chambers; the distance between the vertical central axis of the spark plug mounting seat and the rear end face of the injector is 1.0-1.2 times of the inner diameter of the combustion cavity;
the injector is a step cylinder, and is sequentially provided with a flange III, a cylindrical section I, a cylindrical section II and a cylindrical section III from front to back, wherein the flange III of the injector is identical to the flange I of the combustion chamber in outer diameter and is matched with the end face; the cylindrical section I is in transition fit with the inner cavity of the combustion chamber; the diameter of the cylindrical section II is smaller than the diameter of an airflow channel of the combustion chamber, and a cavity between the cylindrical section II and the inner wall of the combustion chamber is an air cavity which is communicated with an air inlet; the diameter of the cylindrical section III is smaller than that of an airflow channel of the combustion chamber, a circumferential gap is designed between the cylindrical section III and the combustion chamber, the circumferential gap between the cylindrical section III and the combustion chamber forms an air film cooling circumferential gap, the air film cooling circumferential gap is communicated with an air cavity, high-pressure air entering the air cavity from an air inlet enters the combustion chamber through the air film cooling circumferential gap, and an air film is formed on the inner wall of the combustion chamber; the air flow channel on the horizontal central axis of the rear section of the injector is a collecting and expanding channel, the collecting and expanding channel sequentially comprises a shrinkage section, an equal straight section and an expansion section from front to back, the expansion angle range of the expansion section is 20-30 degrees, the expansion section is provided with air injection holes which are communicated with an air cavity and are uniformly distributed along the circumferential direction, and the included angle between the air injection holes and the horizontal central axis is 30-60 degrees;
high-pressure air enters the air cavity from the air inlet, enters the expansion section through the air injection hole, and enters the expansion section through the air flow channel, wherein the high-pressure air and the high-pressure hydrogen have relative radial speeds and mutually collide in the expansion section to realize mixing, so that combustible mixed gas is formed, and the spark plug ignites the combustible mixed gas to form high-temperature fuel gas; the injection pressure drop range of the high-pressure air through the air film cooling circumferential seam and the air injection hole is 0.1-1 MPa;
the airflow channel of the fire transmission rod is a contraction channel, and the contraction channel is sequentially provided with a contraction section and an equal straight section from front to back; high-temperature fuel gas is sprayed out through the contraction channel;
the equivalent ratio of the high-pressure air to the high-pressure hydrogen of the mutual impact type air-hydrogen torch igniter is 0.8-2.0, and the flame temperature range is 2000-2400K; the fire transmission rod of the mutually-striking air hydrogen torch igniter is inserted into the to-be-ignited combustion device and is fixedly connected with the to-be-ignited combustion device through bolts fixed on a flange III at the tail end of the combustion chamber.
Further, the ignition cabinet converts 220V alternating current into 10kV high voltage power and outputs the 10kV high voltage power to the spark plug.
Further, a sealing ring is arranged on the contact end surface of the flange III of the injector and the flange I of the combustion chamber.
Further, the combustion chamber is made of stainless steel.
Further, the pressure range of the high-pressure air is 7-15 MPa, and the flow range is 90-200 g/s; the pressure range of the high-pressure hydrogen is 9-15 MPa, and the flow range is 2-10 g/s.
Further, the material of the fire transmission rod is a high-temperature alloy, and the brand of the fire transmission rod is one of GH3128 or GH 3230.
Further, the fire transmission rod is fixed in a welding mode.
The injector of the mutual impact type air-hydrogen torch igniter adopts the collecting and expanding channel, and the collecting and expanding channel has the advantages that the injection speed of high-pressure hydrogen can be improved, and the shearing action of the high-pressure hydrogen and the high-pressure air is enhanced; secondly, the high-pressure hydrogen has radial speed, and the mixing efficiency of the high-pressure hydrogen and the high-pressure air is improved. The number and the inner diameter of air injection holes uniformly distributed in the expansion section are determined according to the air flow, so that the injection pressure drop range of high-pressure air is ensured to be 0.1-1 MPa; the included angle between the injection direction of the high-pressure air and the high-pressure hydrogen ranges from 30 degrees to 60 degrees, so that the high-pressure hydrogen and the high-pressure air have opposite radial speeds and mutually collide, and the mixing effect of the high-pressure hydrogen and the high-pressure air is greatly enhanced. The mutually-striking coaxial shearing nozzle formed by the collecting and expanding channel ensures that high-pressure hydrogen and high-pressure air are fully mixed, and combustible mixed gas is formed in the combustion chamber, so that the requirement on ignition energy is reduced.
According to the mutual impact type air-hydrogen torch igniter, the air film cooling circular seam is designed between the injector and the combustion chamber, the combustion chamber can be prevented from being ablated by high-temperature fuel gas by the air film cooling circular seam, the width of the air film cooling circular seam is determined according to high-pressure air flow, and the injection pressure drop range of high-pressure air is ensured to be 0.1-1 MPa; a part of air enters the combustion chamber through the air film cooling circumferential seam, and an air film is formed on the inner wall of the combustion chamber, so that heat transfer between high-temperature fuel gas in the combustion chamber and the inner wall of the combustion chamber can be effectively reduced, and the combustion chamber can work for a long time without being ablated by adopting common stainless steel.
The middle section of the combustion chamber of the mutually-striking air-hydrogen torch igniter is provided with two high-energy spark plugs which are vertically symmetrical, and the distance between the horizontal central axis of the spark plugs and the rear end face of the injector is 1.0-1.2 times of the inner diameter of the combustion chamber. The sparking plug is movably connected with the sparking plug mounting seat, so that the dismounting is convenient; the ignition cabinet converts 220V alternating current into 10kV high voltage power and outputs the 10kV high voltage power to the ignition plug, and the ignition plug ignites the combustible mixed gas.
The fire transmission rod of the mutual impact type air-hydrogen torch igniter is inserted into the to-be-ignited combustion device, and is fixedly connected with the to-be-ignited combustion device through the bolts fixed on the flange III at the tail end of the combustion chamber, so that the installation is convenient.
The mutually-striking type air-hydrogen torch igniter provided by the invention is characterized in that the fire transmission rod is welded at the tail end of the combustion chamber, so that no leakage is ensured. The fire transfer rod is made of high-temperature alloy GH3128 (or GH 3230), and has better structural strength without adopting other cooling structures under the condition that the working time of the torch igniter is not more than 5 s. The airflow channel of the fire transmission rod contracts the passageway, and the passageway contracts the passageway and is shrink section and waiting straight section in proper order from front to back, and shrink section can improve torch igniter combustion chamber room pressure, guarantees that high pressure hydrogen fully burns, promotes torch igniter combustion efficiency and gas outlet temperature homogeneity.
The mutually-striking type air-hydrogen torch igniter can accurately control the flow of high-pressure hydrogen and high-pressure air through the air injection holes, and can normally ignite and stably work in a wider equivalent ratio range (0.8-2.0) of the high-pressure air and the high-pressure hydrogen due to the excellent mixing effect of the mutually-striking type coaxial shearing nozzle; meanwhile, the flame temperature generated by the torch igniter is controlled to 2000-2400K, so that enough ignition energy is provided to ensure that the combustion device is ignited, and the flame temperature is prevented from being too high, and long-time work can be realized without considering a complex cooling structure.
The invention relates to a mutual impact type air-hydrogen torch igniter, which has the following characteristics:
1. the air and hydrogen are adopted for ignition, so that the safety risk of a supply pipeline is reduced, and the long-time work of about 5 seconds can be realized;
2. the mixing effect of the hydrogen and the air is enhanced by adopting the mutually-striking coaxial shearing nozzle, so that the ignition reliability is improved;
3. the combustion chamber is internally provided with a gas film cooling circular seam, and a cooling gas film is formed on the inner wall of the combustion chamber, so that ablation is avoided;
4. the reliable ignition of the equivalent ratio of the high-pressure air to the high-pressure hydrogen in the range of 0.8-2.0 can be realized, and the working range is wide; flame temperature is controlled to 2000K-2400K, and temperature interval is proper;
5. the fire transmission rod is made of a high-temperature alloy material, so that the torch igniter can work for a long time;
6. the structure is simple, and the injector and the spark plug are replaceable; the torch igniter is connected with the device to be burnt through the bolts of the flange III, so that the device is convenient to assemble and disassemble;
7. the spark plug for igniting the torch igniter is a common civil product, and has strong universality, simplicity and reliability.
In short, the mutual impact type air-hydrogen torch igniter adopts the mutual impact type coaxial shearing nozzle, so that the mixing of air and hydrogen is enhanced, and the reliable ignition is realized; controlling the temperature of the fuel gas through the equivalence ratio of the high-pressure air and the high-pressure hydrogen; the air and hydrogen burning organization mode is adopted, so that the safety risk of a supply system is reduced, and the long-time work of a torch igniter is realized; the gas film cooling circular seam is formed on the inner wall of the combustion chamber to form a cooling gas film, so that the combustion chamber is prevented from being ablated by high-temperature gas, and the working time of the torch igniter is prolonged; the fire transmission rod contacted with the high-temperature fuel gas adopts high-temperature alloy, so that the long-time work and the repeated work of the torch igniter are realized.
Drawings
FIG. 1 is a cross-sectional view of a mutually striking air-hydrogen torch igniter of the invention;
FIG. 2 is a perspective view of a mutually striking air-hydrogen torch igniter of the present invention;
FIG. 3 is a schematic illustration of a cross-fire coaxial shear injection configuration in a cross-fire air-hydrogen torch igniter of the present invention.
In the figure, 1. A hydrogen inlet; 2. an injector; 3. a combustion chamber; 4. a spark plug mounting base; 5. a spark plug; 6. a fire transmission rod; 7. an air inlet; 8. a pressure measuring joint; 9. air injection holes.
Description of the embodiments
The invention is described in detail below with reference to the drawings and examples.
Example 1
As shown in fig. 1 and 2, the combustion chamber 3 of the mutually striking air-hydrogen torch igniter of the embodiment is a cylinder; the front end of the combustion chamber 3 is provided with a flange I, the injector 2 is fixed through the flange I, the injector 2 is externally connected with a hydrogen nozzle, and the hydrogen nozzle is provided with a hydrogen inlet 1; the middle section of the combustion chamber 3 is provided with spark plug mounting seats 4 which are vertically symmetrical, the spark plugs 5 are respectively inserted into the spark plug mounting seats 4, and the spark plugs 5 are externally connected with an ignition cabinet; the rear section of the combustion chamber 3 is connected with a pressure measuring joint 8; the rear end of the combustion chamber 3 is provided with a flange II, and the rear end of the combustion chamber 3 is also inserted with a fire transmission rod 6; the hydrogen nozzle, the hydrogen inlet 1, the injector 2, the combustion chamber 3 and the fire transmission rod 6 are the same as the horizontal central axis, the horizontal central axis is provided with a front-back through airflow channel, and the airflow channels at the middle section and the rear section of the combustion chamber 3 are combustion chambers; the distance between the vertical central axis of the spark plug mounting seat 4 and the rear end face of the injector 2 is 1.0-1.2 times of the inner diameter of the combustion cavity;
the injector 2 is a step cylinder, and is sequentially provided with a flange III, a cylindrical section I, a cylindrical section II and a cylindrical section III from front to back, wherein the flange III of the injector 2 is the same as the flange I of the combustion chamber 3 in outer diameter and is matched with the end face; the cylindrical section I is in transition fit with the inner cavity of the combustion chamber 3; the diameter of the cylindrical section II is smaller than that of the airflow channel of the combustion chamber 3, and a cavity between the cylindrical section II and the inner wall of the combustion chamber 3 is an air cavity which is communicated with the air inlet 7; as shown in fig. 3, the diameter of the cylindrical section iii is smaller than that of the air flow channel of the combustion chamber 3, a circumferential gap is designed between the cylindrical section iii and the combustion chamber 3, the circumferential gap between the cylindrical section iii and the combustion chamber 3 forms an air film cooling circumferential gap, the air film cooling circumferential gap is communicated with an air cavity, high-pressure air entering the air cavity from the air inlet 7 enters the combustion cavity through the air film cooling circumferential gap, and an air film is formed on the inner wall of the combustion cavity; the air flow channel on the horizontal central axis of the rear section of the injector 2 is a collecting and expanding channel, the collecting and expanding channel sequentially comprises a collecting section, an equal straight section and an expanding section from front to back, the expanding angle range of the expanding section is 20-30 degrees, air injection holes 9 which are communicated with an air cavity and uniformly distributed along the circumferential direction are arranged on the expanding section, and the included angle between the air injection holes 9 and the horizontal central axis is 30-60 degrees;
high-pressure air enters the air cavity from the air inlet 7, enters the expansion section through the air injection hole 9, high-pressure hydrogen entering from the hydrogen inlet 1 enters the expansion section through the air flow channel, the high-pressure air and the high-pressure hydrogen have relative radial speeds, mutually collide in the expansion section to realize mixing, so that combustible mixed gas is formed, and the spark plug 5 ignites the combustible mixed gas to form high-temperature fuel gas; the injection pressure drop range of the high-pressure air through the air film cooling circumferential seam and the air injection hole 9 is 0.1-1 MPa;
the airflow channel of the fire transmission rod 6 is a contraction channel, and the contraction channel is sequentially provided with a contraction section and an equal straight section from front to back; high-temperature fuel gas is sprayed out through the contraction channel;
the equivalent ratio of the high-pressure air to the high-pressure hydrogen of the mutual impact type air-hydrogen torch igniter is 0.8-2.0, and the flame temperature range is 2000-2400K; the fire transmission rod 6 of the mutually-striking air hydrogen torch igniter is inserted into the combustion device to be ignited and is fixedly connected with the combustion device to be ignited through bolts fixed on a flange III at the tail end of the combustion chamber 3.
Further, the ignition cabinet converts 220V alternating current into 10kV high voltage power and outputs the 10kV high voltage power to the spark plug 5.
Further, a sealing ring is arranged on the contact end surface of the flange III of the injector 2 and the flange I of the combustion chamber 3.
Further, the combustion chamber 3 is made of stainless steel.
Further, the pressure range of the high-pressure air is 7-15 MPa, and the flow range is 90-200 g/s; the pressure range of the high-pressure hydrogen is 9-15 MPa, and the flow range is 2-10 g/s.
Further, the material of the fire transmission rod 6 is a high-temperature alloy, and the brand is one of GH3128 or GH 3230.
Further, the fire transmission rod 6 is fixed by welding.
Although the embodiments of the present invention have been disclosed above, it is not limited to the use listed in the specification and the embodiments, but it can be fully applied to various fields suitable for the present invention. Additional modifications and variations may readily be made by those skilled in the art without departing from the principles of the present invention, and the invention is not limited to the specific details and illustrations shown and described herein.
Claims (7)
1. The mutual impact type air-hydrogen torch igniter is characterized in that a combustion chamber (3) of the mutual impact type air-hydrogen torch igniter is a cylinder; the front end of the combustion chamber (3) is provided with a flange plate I, the injector (2) is fixed through the flange plate I, the injector (2) is externally connected with a hydrogen nozzle, and the hydrogen nozzle is provided with a hydrogen inlet (1); the middle section of the combustion chamber (3) is provided with spark plug mounting seats (4) which are vertically symmetrical, the spark plugs (5) are respectively inserted into the spark plug mounting seats (4), and the spark plugs (5) are externally connected with an ignition cabinet; the rear section of the combustion chamber (3) is connected with a pressure measuring joint (8); the rear end of the combustion chamber (3) is provided with a flange II, and the rear end of the combustion chamber (3) is also inserted with a fire transmission rod (6); the hydrogen nozzle, the hydrogen inlet (1), the injector (2), the combustion chamber (3) and the fire transmission rod (6) are the same as the horizontal central axis, the horizontal central axis is provided with a front-back through airflow channel, and the airflow channels at the middle section and the rear section of the combustion chamber (3) are combustion chambers; the distance between the vertical central axis of the spark plug mounting seat (4) and the rear end face of the injector (2) is 1.0-1.2 times of the inner diameter of the combustion cavity;
the injector (2) is a step cylinder, and comprises a flange III, a cylindrical section I, a cylindrical section II and a cylindrical section III from front to back in sequence, wherein the flange III of the injector (2) is identical to the flange I of the combustion chamber (3) in outer diameter and end face matching; the cylindrical section I is in transition fit with the inner cavity of the combustion chamber (3); the diameter of the cylindrical section II is smaller than the diameter of an airflow channel of the combustion chamber (3), and a cavity between the cylindrical section II and the inner wall of the combustion chamber (3) is an air cavity which is communicated with an air inlet (7); the diameter of the cylindrical section III is smaller than that of an airflow channel of the combustion chamber (3), a circular seam gap is designed between the cylindrical section III and the combustion chamber (3), the circular seam gap between the cylindrical section III and the combustion chamber (3) forms an air film cooling circular seam, the air film cooling circular seam is communicated with an air cavity, high-pressure air entering the air cavity from an air inlet (7) enters the combustion chamber through the air film cooling circular seam, and an air film is formed on the inner wall of the combustion chamber; the air flow channel on the horizontal central axis of the rear section of the injector (2) is a contraction and expansion channel, the contraction and expansion channel is sequentially provided with a contraction section, an equal straight section and an expansion section from front to back, the expansion angle range of the expansion section is 20-30 degrees, the expansion section is provided with air injection holes (9) which are communicated with the air cavity and are uniformly distributed along the circumferential direction, and the included angle between the air injection holes (9) and the horizontal central axis is 30-60 degrees;
high-pressure air enters the air cavity from the air inlet (7), enters the expansion section through the air injection hole (9), high-pressure hydrogen entering from the hydrogen inlet (1) enters the expansion section through the air flow channel, the high-pressure air and the high-pressure hydrogen have relative radial speeds, mutually collide in the expansion section to realize mixing, so as to form combustible mixed gas, and the spark plug (5) ignites the combustible mixed gas to form high-temperature fuel gas; the injection pressure drop range of the high-pressure air through the air film cooling circumferential seam and the air injection hole (9) is 0.1-1 MPa;
the air flow channel of the fire transmission rod (6) is a contraction channel, and the contraction channel is sequentially provided with a contraction section and an equal straight section from front to back; high-temperature fuel gas is sprayed out through the contraction channel;
the equivalent ratio of the high-pressure air to the high-pressure hydrogen of the mutual impact type air-hydrogen torch igniter is 0.8-2.0, and the flame temperature range is 2000-2400K; the fire transmission rod (6) of the mutually-striking air hydrogen torch igniter is inserted into the combustion device to be ignited and is fixedly connected with the combustion device to be ignited through bolts fixed on a flange III at the tail end of the combustion chamber (3).
2. The mutual-impact type air-hydrogen torch igniter of claim 1, wherein the ignition cabinet converts 220V alternating current into 10kV high voltage power and outputs the 10kV high voltage power to the spark plug (5).
3. The mutually-striking air-hydrogen torch igniter of claim 1, wherein a sealing ring is arranged on the contact end surface of a flange III of the injector (2) and a flange I of the combustion chamber (3).
4. The mutually-striking air-hydrogen torch igniter of claim 1 wherein the combustion chamber (3) is made of stainless steel.
5. The mutually-striking air-hydrogen torch igniter of claim 1, wherein the pressure range of the high-pressure air is 7-15 mpa, and the flow range is 90-200 g/s; the pressure range of the high-pressure hydrogen is 9-15 MPa, and the flow range is 2-10 g/s.
6. The mutually striking type air-hydrogen torch igniter of claim 1, wherein the material of the fire transfer rod (6) is a superalloy, and the brand is one of GH3128 or GH 3230.
7. The mutually-striking air-hydrogen torch igniter of claim 1, wherein the flame transfer rod (6) is fixed by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310219310.1A CN116085825A (en) | 2023-03-09 | 2023-03-09 | Mutual impact type air hydrogen torch igniter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310219310.1A CN116085825A (en) | 2023-03-09 | 2023-03-09 | Mutual impact type air hydrogen torch igniter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116085825A true CN116085825A (en) | 2023-05-09 |
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ID=86208469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310219310.1A Pending CN116085825A (en) | 2023-03-09 | 2023-03-09 | Mutual impact type air hydrogen torch igniter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116085825A (en) |
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2023
- 2023-03-09 CN CN202310219310.1A patent/CN116085825A/en active Pending
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