CN113819465A - Flow-adjustable gas oxygen and methane rich combustion gas generation device and method - Google Patents
Flow-adjustable gas oxygen and methane rich combustion gas generation device and method Download PDFInfo
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- CN113819465A CN113819465A CN202111014919.2A CN202111014919A CN113819465A CN 113819465 A CN113819465 A CN 113819465A CN 202111014919 A CN202111014919 A CN 202111014919A CN 113819465 A CN113819465 A CN 113819465A
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- oxygen
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 213
- 239000007789 gas Substances 0.000 title claims abstract description 108
- 239000001301 oxygen Substances 0.000 title claims abstract description 46
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 46
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000000567 combustion gas Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 33
- 239000002737 fuel gas Substances 0.000 claims abstract description 30
- NLOAOXIUYAGBGO-UHFFFAOYSA-N C.[O] Chemical compound C.[O] NLOAOXIUYAGBGO-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims description 19
- 239000000446 fuel Substances 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 12
- 230000008520 organization Effects 0.000 abstract description 5
- 239000000306 component Substances 0.000 description 32
- 238000011160 research Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14003—Special features of gas burners with more than one nozzle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to a flow-adjustable gas oxygen methane rich combustion gas generation device and a flow-adjustable gas oxygen methane rich combustion gas generation method, and aims to solve the technical problem that the existing gas generation device cannot generate rich combustion gas meeting the requirement of a methane single-nozzle test in a combustion organization mode, gas flow, working pressure and temperature range. The device comprises an upstream section, a pressure stabilizing section, a pressure control throat part, a main pipeline and a throttling ring; the upstream section is used for organizing the combustion of oxygen and methane; the pressure stabilizing section comprises a convergence channel, a main channel and a pressure stabilizing channel which are communicated; the pressure control throat part is detachably connected to the tail end of the pressure stabilizing channel; the throttle ring is detachably connected to the tail end of the main channel; the main pipeline is detachably connected with the tail end of the throttling ring. The method comprises the following steps: 1. introducing gas oxygen methane into a double-component coaxial nozzle; 2. the spark plug ignites the blended gas; 3. the turbulence ring is further mixed with combustion gas; 4. through the pressure control throat part and the throttling ring, the main pipeline discharges rich fuel gas meeting the target pressure and flow.
Description
Technical Field
The invention relates to a gas oxygen methane rich combustion gas generation device, in particular to a gas oxygen methane rich combustion gas generation device with adjustable flow and a method thereof.
Background
The full-flow afterburning circulating liquid oxymethane engine is a high-performance power system with high flow, low cost and reusability. The oxygen-enriched gas/fuel-enriched gas thrust chamber is a core component for generating thrust of the engine, the oxygen-enriched gas fuel-enriched gas combustion technology is also an identification characteristic of the engine which is different from the traditional engine, and a set of mature, complete and wide-envelope gas-gas nozzle database is established as a precondition for developing the research and development of a thrust chamber injector.
The single-nozzle test research method has relatively low implementation cost and short verification period, is convenient for single variable stripping, can quickly obtain the combustion characteristics and the working envelopes of different types of gas-gas nozzles, is an important way for developing the characteristic research and the model selection of the nozzles, and is an effective means for distributing the development risk of an engine system.
Different from the traditional gas-gas single-nozzle test research, the fuel path of the full-flow afterburning liquid oxygen methane gas single-nozzle test (hereinafter referred to as the methane single-nozzle test) is rich fuel gas with high temperature and high pressure, so that the research for obtaining the gas oxygen methane rich fuel gas generating device and method has important significance for developing the basic research of the gas-gas nozzle.
According to the research characteristics of a methane single nozzle test, the rich-fuel gas generating device not only needs to meet the performance requirements of stable combustion, uniform gas and the like under the condition of a biased mixing ratio, but also needs to have a wider application range on the working parameters of the rich-fuel gas such as temperature (below 1000K), flow (0.2-2 kg/s), pressure (2-12 MPa) and the like. In the technical field of high-pressure combustion of methane and oxygen, similar combustion organization forms are mostly used for a torch igniter and a special heater at present, wherein the temperature of fuel gas of the torch igniter is generally between 1200 and 2500K, the flow rate is in the range of 0-300g/s, the combustion organization of the heater is close to an equivalent mixing ratio, and the combustion temperature is generally above 2500K. In the category of thermal assemblies, similar gas generating devices for single-nozzle tests mainly face hydrogen-oxygen engines, and the working pressure, the combustion structure form and the temperature range of the similar gas generating devices are different from those of methane gas. Therefore, the existing gas oxygen methane combustion organization method and the existing gas generation scheme can not be directly applied to the methane single-nozzle test.
Disclosure of Invention
The invention aims to solve the technical problem that the existing gas generating device cannot generate the gas oxygen methane rich fuel gas meeting the requirement of a methane single nozzle test in the combustion organization mode, the gas flow, the working pressure and the temperature range, and provides a gas oxygen methane rich fuel gas generating device with adjustable flow and a method.
The technical scheme provided by the invention is as follows:
a gas oxygen methane rich combustion gas generating device with adjustable flow is characterized in that:
comprises an upstream section, a pressure stabilizing section, a pressure control throat part, a main pipeline and a throttling ring;
the upstream section is used for organizing the combustion of gas oxygen and gas methane to generate fuel-rich gas;
the pressure stabilizing section comprises a convergence channel, a main channel and a pressure stabilizing channel which are communicated;
the front end of the convergent channel is connected with the upstream section, the main channel is connected with the tail end of the convergent channel, and the pressure stabilizing channel is arranged on one side of the main channel;
the pressure control throat part is connected to the tail end of the pressure stabilizing channel and detachably connected with the pressure stabilizing channel;
the throttle ring is connected to the tail end of the main channel;
the main pipeline is connected to the tail end of the throttling ring; the throttle ring, the main channel and the main pipeline are detachably connected.
Further, the upstream section comprises a head part and a body part connected to the tail end of the head part; the pressure stabilizing section is connected to the tail end of the body part;
a cooling methane inlet is formed in one side of the front end of the body part;
the head part is provided with a spark plug in an axial penetrating way, the rear end surface of the head part is provided with a double-component coaxial nozzle, and a plurality of direct-current methane nozzles are arranged around the double-component coaxial nozzle; the side surface of the head part is provided with an oxygen inlet and a nozzle methane inlet; the inner nozzle of the double-component coaxial nozzle is communicated with the oxygen inlet; the outer nozzle of the double-component coaxial nozzle is communicated with a methane inlet of the nozzle, and the direct-current methane nozzle is communicated with a cooling methane inlet.
The combustion is organized by adopting the double-component coaxial nozzle with stronger pressure adaptability, the combustion mixing ratio of the central shaft area of the nozzle is improved, and the combustion process of the combustion generator is more stable and continuous.
Set up the regional outside of center pin in nozzle export low reaches and form the cooling protection gas film around the coaxial nozzle of bi-component, central high temperature in the center shaft direction has been followed, the microthermal flow field overall arrangement in limit district, the effectual thermal environment who improves the body wall, reach the protection effect to the body wall, and simultaneously, the regional periphery of nozzle center pin forms the cooling protection gas film and takes place the secondary mixing at axial flow in-process step by step with the regional combustion gas in center, in order to reach the target design parameter of rich fuel gas.
Furthermore, the number of the spark plugs is two, and the spark plugs are symmetrically arranged on two sides of the two-component coaxial nozzle respectively.
And the double spark plugs are adopted for ignition, so that the success rate of ignition is improved.
Further, the head part is provided with a nozzle cavity extending along the axial direction of the upstream section, the two-component coaxial nozzle is arranged in the nozzle cavity, the nozzle cavity is provided with a first cavity section and a second cavity section communicated with the tail end of the first cavity section, and the diameter of the first cavity section is smaller than that of the second cavity section;
the double-component coaxial nozzle comprises a spray pipe, the spray pipe penetrates through the second cavity section, extends into the first cavity section and is connected with the first cavity section in a sealing mode, and the spray pipe and the first cavity section form an inner nozzle; the front end of the first cavity section is communicated with the oxygen inlet;
an outer nozzle of the double-component coaxial nozzle is formed between the inner wall of the second cavity section and the outer wall of the spray pipe, and the second cavity section is communicated with a methane inlet of the nozzle.
Furthermore, a methane gas distribution annular cavity is formed on the side wall, connected with the front end of the body, of the tail end of the head part, and is communicated with the cooling methane inlet and each direct-current methane nozzle.
The methane gas sprayed out by the direct-current methane nozzle is more stable and uniform due to the arrangement of the methane gas distribution ring cavity.
Furthermore, the pressure stabilizing section also comprises a spoiler ring, and the spoiler ring is clamped between the upstream section and the pressure stabilizing section.
In order to overcome the defect that a single-nozzle combustion device is slow in mixing and combustion, the turbulent ring with the convergent-divergent structure is arranged as the accelerating mixing device, the device accelerates the radial mixing of the reaction flow, eliminates the phenomenon of flow stratification, effectively shortens the reaction length of fuel gas, greatly improves the temperature uniformity and the speed uniformity of the flow field, and effectively improves the outflow quality of fuel gas rich in fuel.
Furthermore, the turbulent ring is in a convergent-divergent ring shape, the front end of the turbulent ring is in a convergent configuration, the convergent half angle is 20-45 degrees, the convergent area ratio is 2-3, the tail end of the turbulent ring is in a divergent configuration, the divergent half angle is 60-90 degrees, the convergent half angle is an included angle between the convergent profile of the turbulent ring and the central axis, and the divergent half angle is an included angle between the divergent profile of the turbulent ring and the central axis.
The invention also provides a flow-adjustable method for generating the oxygen-methane rich fuel gas, which is characterized by comprising the following steps of:
s1, conveying oxygen and the first path of methane gas to the two-component coaxial nozzle from the oxygen inlet and the nozzle methane inlet respectively, and mixing the oxygen and the methane gas at the outlet of the two-component coaxial nozzle; introducing a second path of methane gas into a methane gas distribution annular cavity from a cooling methane inlet, and spraying the methane gas in the methane gas distribution annular cavity into a combustion chamber formed by a body cavity through a plurality of direct-current methane nozzles;
s2, igniting the mixed gas of oxygen and methane at the outlet of the two-component coaxial nozzle by using a spark plug, and forming a high-temperature reaction zone at the outlet of the two-component coaxial nozzle along the central axis; the methane gas sprayed out of the direct current methane nozzle forms a protective gas film outside a central shaft high-temperature reaction area of the outlet of the double-component coaxial nozzle, and the central shaft high-temperature area gradually and radially mixes and afterburning with the outer protective gas film along with the axial flow of combustion gas flow;
s3, further mixing and afterburning the combusted airflow through a turbulence ring in the axial flow process, so that the speed uniformity and the temperature uniformity of the combusted airflow are improved;
s4, after the combustion airflow passes through the convergent channel, part of the combustion airflow enters the pressure stabilizing channel, and is discharged after being limited by the throat diameter of the pressure control throat; and after the other part of combustion airflow passes through the throttling ring along the main channel, the fuel-rich gas with the required target pressure and target flow is discharged along the main pipeline.
Further, according to the flow and pressure of the introduced oxygen and methane, and the target flow and target pressure of the generated fuel-rich gas, a throttle ring with a proper size and a pressure control throat with a proper throat diameter are selected.
Further, in the step S1, the flow rate of the oxygen and the methane entering the fuel-rich gas generating device is 5-1000g/S, the ventilation pressure is 5-16MPa, and the mass ratio of the introduced oxygen and the methane is 0.15-0.6; in the step S4, the temperature of the generated rich fuel gas is 750-1100K, the pressure of the rich fuel gas is 4-15MPa, and the flow rate of the rich fuel gas is 0-1000 g/S.
The technical effects of the invention comprise:
1. the invention adopts a design idea of pressure stabilizing and pressure reducing double channels, the pressure control throat part is arranged by adjusting the pressure stabilizing channel, redundant fuel gas is discharged to stabilize the pressure of the combustion chamber, and meanwhile, the pressure of the fuel gas rich in combustion is reduced to the target pressure by arranging the throttling ring.
2. The pressure control throat part and the pressure stabilizing channel are detachably connected, the throttling ring, the main channel and the main pipeline are also detachably connected, and the pressure control throat parts with different throat diameters and the throttling rings with different sizes are produced, so that the proper pressure control throat part and the throttling ring are selected according to the flow and pressure of the oxygen and the methane introduced into the upstream section and the target pressure and target flow required by the rich-combustion gas, the device is suitable for adjusting the gas pressure of a high-temperature high-pressure device, and the application range of the rich-combustion gas generating device of the oxygen, the methane is wider.
3. The high-pressure gas, oxygen and methane are introduced into the two-component coaxial nozzles to be mixed and ignited to form a high-temperature reaction zone along the central axis, and the gas methane sprayed out from the plurality of direct-current methane nozzles forms a protective gas film on the outer side of the high-temperature reaction zone, so that the inner wall of the body part is protected, and the combustion gas is secondarily mixed in the axial flow process, and the temperature uniformity and the speed uniformity of a flow field are improved.
Drawings
FIG. 1 is a side view of the gas oxygen methane rich gas generating device with adjustable flow rate of the invention (the pressure-stabilizing channel and the pressure-controlling throat part are not shown in the figure);
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is an enlarged view of B in fig. 2.
The reference numbers are as follows:
1-head part, 2-spark plug, 3-double-component coaxial nozzle, 4-oxygen inlet, 5-nozzle methane inlet, 6-cooling methane inlet, 7-methane distribution ring cavity, 8-body part, 9-turbulent flow ring, 10-convergence channel, 11-pressure stabilizing channel, 12-pressure control throat part, 13-throttling ring, 14-main pipeline and 15-direct-current methane nozzle.
Detailed Description
In this embodiment, the gas inlet end is defined as a front end and the gas outlet end is defined as a rear end according to the gas flow direction.
Referring to fig. 1 to 3, fig. 1 is a side view of an air inlet end of an oxygen-methane rich gas generating device with adjustable flow rate according to the present invention, and the oxygen-methane rich gas generating device of the present embodiment includes an upstream section, a pressure stabilizing section, a pressure control throat 12, a main pipeline 14 and a throttle 13.
The upstream section comprises a head part 1 and a body part 8 connected to the tail end of the head part 1; the surge section is connected to the end of the body portion 8 and the upstream section is used to organize the combustion of oxygen and methane gas to produce a fuel rich gas.
The body part 8 comprises a cooling methane inlet 6 arranged on the outer side wall of the front end of the body part 8 and a methane distribution annular cavity 7 arranged on the inner wall of the front end of the body part 8; the methane gas distribution ring cavity 7 is communicated with the cooling methane inlet 6.
The head part 1 is provided with two spark plugs 2 along the axial direction in a penetrating way, the rear end face of the head part is provided with a two-component coaxial nozzle 3, two circles of direct current methane nozzles 15 are arranged around the two-component coaxial nozzle 3, and as can be seen from figures 1 and 2, the two circles of direct current methane nozzles 15 are not continuously arranged, but are arranged around the two-component coaxial nozzle 3 and are spaced by two spark plugs 2; the two spark plugs 2 are symmetrically arranged on two sides of the double-component coaxial nozzle 3, so that the ignition success rate is improved; the side of the head 1 is provided with an oxygen inlet 4 and a nozzle methane inlet 5.
The head part 1 is provided with a nozzle cavity extending along the axial direction of the upstream section, the two-component coaxial nozzle 3 is arranged in the nozzle cavity, the nozzle cavity is provided with a first cavity section and a second cavity section communicated with the tail end of the first cavity section, and the diameter of the first cavity section is smaller than that of the second cavity section;
the double-component coaxial nozzle 3 comprises a spray pipe, the tail end of the spray pipe is arranged in the second cavity section in a penetrating mode, the front end of the spray pipe is inserted into the first cavity section and is communicated with the first cavity section in a sealing mode, the spray pipe and the first cavity section form an inner nozzle, and the front end of the first cavity section is communicated with the oxygen inlet 4; an outer nozzle of the two-component coaxial nozzle 3 is formed between the inner wall of the second cavity section and the outer wall of the spray pipe.
The inner nozzle of the double-component coaxial nozzle 3 is communicated with the oxygen inlet 4; the outer nozzle of the double-component coaxial nozzle 3 is communicated with a nozzle methane inlet 5, and the direct-current methane nozzle 15 is communicated with a cooling methane inlet 6 through a methane gas distribution annular cavity 7.
The pressure stabilizing section comprises a turbulence ring 9, a convergence channel 10, a main channel and a pressure stabilizing channel 11, the turbulence ring 9 is clamped between the tail end of the body part 8 and the pressure stabilizing section, and the main channel is connected to the downstream of the convergence channel 10; the surge tank 11 is connected to and disposed at one side of the main channel.
The pressure control throat part 12 is connected with the tail end of the pressure stabilizing channel 11, and the pressure control throat part 12 is detachably connected with the pressure stabilizing channel 11;
the throttle ring 13 is connected to the tail end of the main channel, and the throttle ring 13 is detachably connected with the main channel;
the main pipeline 14 is connected to the tail end of the throttle ring 13; the choke 13 is detachably connected to the main line 14.
The working process of the oxygen-methane rich fuel gas generating device comprises the following steps: high-pressure oxygen enters an inner nozzle of the double-component coaxial nozzle 3 in the head part 1 from an oxygen inlet 4 after passing through a conveying pipeline; the high-pressure methane is divided into a nozzle methane path and a cooling methane path through a conveying pipeline, the nozzle methane path enters an outer nozzle of the double-component coaxial nozzle 3 through a nozzle methane inlet 5, and the cooling methane path enters a methane gas distribution annular cavity 7 through a cooling methane inlet 6.
The flow of the oxygen and the methane into the fuel-rich gas generating device is 5-1000g/s, the ventilation pressure is 5-16MPa, and the mass ratio of the introduced oxygen and the methane is 0.15-0.6.
The two spark plugs 2 are symmetrically distributed at two sides of the two-component coaxial nozzle 3, when gas methane and gas oxygen pass through the outlet of the two-component coaxial nozzle 3, the gas methane and the gas oxygen are ignited by the spark plugs 2, and the gas oxygen and the gas methane are violently mixed and combusted in the central shaft area of the two-component coaxial nozzle 3 to form a high-temperature reaction area; the cooling methane enters a combustion chamber formed by the cavity of the body part 8 through two circles of direct-current methane nozzles 15, and a cooling protective gas film is formed outside the high-temperature area of the central shaft of the double-component coaxial nozzle 3.
Along with the axial flow of the combustion gas flow, the central high-temperature area and the side gas film area are gradually subjected to radial mixing afterburning. When the combustion gas flows through the turbulent ring 9, the combustion gas flow is expanded after being radially compressed, the mixing and afterburning process of the flow field is further accelerated, and the temperature uniformity of the flow field is remarkably improved along with the gradual disappearance of the flow stratification phenomenon.
The obtained fully combusted airflow is subjected to flow splitting after passing through a convergence channel 10, one part of the combusted airflow enters a pressure stabilizing pipeline 11, is subjected to flow limiting through a pressure control throat part 12 and then is discharged into the atmosphere, the other part of the combusted airflow passes through a throttling ring 13, the total pressure and the flow of a flow field are reduced to target pressure and target flow, required rich fuel gas is discharged after passing through a main pipeline 14 and enters a downstream methane single nozzle test device, the temperature of the generated rich fuel gas is 750-1100K, the pressure is 4-15MPa, and the flow is 0-1000g/s, so that the working parameter range of the methane single nozzle test is met.
When the flow and the pressure of the gas oxygen and the methane input by the gas oxygen and methane rich combustion gas generating device are adjusted, the throat diameter of the pressure control throat part 12 and the drift diameter of the throttling ring 13 are selected to redistribute the flow of the rich combustion gas flowing through the pressure stabilizing pipeline 11 and the main pipeline 14 according to the pressure and the flow of the rich combustion gas required by the downstream methane single nozzle test device, so that the pressure of a combustion chamber or the relative flow density is constant, and the mixing and combustion process of the generator is more stable and efficient.
Claims (10)
1. The utility model provides a gas oxygen methane rich gas generates device that fires with adjustable flow which characterized in that:
comprises an upstream section, a pressure stabilizing section, a pressure control throat part (12), a main pipeline (14) and a throttle ring (13);
the upstream section is used for organizing the combustion of gas oxygen and gas methane to generate fuel-rich gas;
the pressure stabilizing section comprises a convergence channel (10), a main channel and a pressure stabilizing channel (11) which are communicated;
the front end of the convergent channel (10) is connected with the upstream section, the main channel is connected with the tail end of the convergent channel (10), and the pressure stabilizing channel (11) is arranged on one side of the main channel;
the pressure control throat part (12) is detachably connected to the tail end of the pressure stabilizing channel (11);
the throttle ring (13) is connected to the tail end of the main channel;
the main pipeline (14) is connected to the tail end of the throttling coil;
the main channel, the throttling ring (13) and the main pipeline (14) are detachably connected.
2. The flow-adjustable gas oxygen methane rich fuel gas generating device according to claim 1, characterized in that: the upstream section comprises a head part (1) and a body part (8) connected to the tail end of the head part (1); the pressure stabilizing section is connected to the tail end of the body part (8);
a cooling methane inlet (6) is arranged on one side of the front end of the body part (8);
the head (1) is provided with a spark plug (2) in an axial penetrating way, the rear end face of the head is provided with a double-component coaxial nozzle (3), and a plurality of direct-current methane nozzles (15) are arranged around the double-component coaxial nozzle (3); the side surface of the head part (1) is provided with an oxygen inlet (4) and a nozzle methane inlet (5); the inner nozzle of the double-component coaxial nozzle (3) is communicated with the oxygen inlet (4); the outer nozzle of the double-component coaxial nozzle (3) is communicated with the nozzle methane inlet (5), and the direct-current methane nozzle (15) is communicated with the cooling methane inlet (6).
3. The flow-adjustable oxy-methane rich fuel gas generation device according to claim 2, characterized in that: the number of the spark plugs (2) is two, and the spark plugs are respectively and symmetrically arranged on two sides of the double-component coaxial nozzle (3).
4. The flow-adjustable gas oxygen methane rich gas generating device according to claim 3, characterized in that: the head part (1) is provided with a nozzle cavity extending along the axial direction of the upstream section, the double-component coaxial nozzle (3) is arranged in the nozzle cavity, the nozzle cavity is provided with a first cavity section and a second cavity section communicated with the tail end of the first cavity section, and the diameter of the first cavity section is smaller than that of the second cavity section;
the two-component coaxial nozzle (3) comprises a spray pipe, the spray pipe penetrates through the second cavity section, extends into the first cavity section and is connected with the first cavity section in a sealing mode, and the spray pipe and the first cavity section form an inner nozzle; the front end of the first cavity section is communicated with the oxygen inlet (4);
an outer nozzle of the double-component coaxial nozzle (3) is formed between the inner wall of the second cavity section and the outer wall of the spray pipe, and the second cavity section is communicated with a nozzle methane inlet (5).
5. The flow-adjustable gas oxygen methane rich gas generating device as claimed in claims 2 to 4, wherein: a methane gas distribution annular cavity (7) is formed in the side wall, connected with the front end of the body part (8), of the tail end of the head part (1), and the methane gas distribution annular cavity (7) is communicated with the cooling methane inlet (6) and the direct-current methane nozzles (15).
6. The flow-adjustable oxy-methane rich fuel gas generation device according to claim 5, characterized in that: the pressure stabilizing section further comprises a flow disturbing ring (9), and the flow disturbing ring (9) is clamped between the upstream section and the pressure stabilizing section.
7. The flow-adjustable gas oxygen methane rich gas generating device according to claim 6, characterized in that: the turbulence ring (9) is in a convergent-divergent ring shape, the front end of the turbulence ring is in a convergent configuration, the convergent half angle is 20-45 degrees, the convergent area ratio is 2-3, the tail end of the turbulence ring is in a divergent configuration, the divergent half angle is 60-90 degrees, the convergent half angle is an included angle between the convergent profile of the turbulence ring (9) and the central axis, and the divergent half angle is an included angle between the divergent profile of the turbulence ring (9) and the central axis.
8. A flow-adjustable gas oxygen methane rich fuel gas generation method is used for generating rich fuel gas meeting target pressure and target flow, and comprises the following steps:
s1, respectively conveying oxygen and the first path of methane gas to the two-component coaxial nozzle (3) from the oxygen inlet (4) and the nozzle methane inlet (5), and mixing the oxygen and the methane gas at the outlet of the two-component coaxial nozzle (3); introducing the second path of methane gas into a methane gas distribution annular cavity (7) from a cooling methane inlet (6), and spraying the methane gas in the methane gas distribution annular cavity (7) into a combustion chamber formed by a body part (8) cavity through a plurality of direct-current methane nozzles (15);
s2, igniting the mixed gas of oxygen and methane at the outlet of the two-component coaxial nozzle (3) by using a spark plug (2), and forming a high-temperature reaction zone at the outlet of the two-component coaxial nozzle (3) along the central axis; the methane gas sprayed out of the direct current methane nozzle (15) forms a protective gas film outside the high-temperature reaction zone, and the high-temperature zone of the central shaft gradually and radially mixes and afterburning with the protective gas film outside along with the flow of combustion gas along the axial direction;
s3, further mixing and post-combusting the combustion gas flow flowing along the axial direction through the turbulence ring (9);
s4, after the combustion airflow passes through the convergent channel (10), part of the combustion airflow enters the pressure stabilizing channel (11) and is discharged after the flow is limited by the throat diameter of the pressure control throat (12); and the other part of the combustion gas flow passes through a throttling ring (13) along the main channel and then discharges the fuel-rich gas with the required target pressure and target flow along a main pipeline (14).
9. The flow-adjustable oxy-methane rich fuel gas generation method of claim 8, wherein: according to the flow and pressure of the introduced oxygen and methane, and the target flow and target pressure of the generated fuel-rich gas, a throttle ring (13) with a proper size and a pressure control throat part (12) with a proper throat diameter are selected.
10. The flow-regulated gas oxygen methane rich fuel gas generation method of claim 9, wherein:
in the step S1, the flow of the oxygen and the methane into the fuel-rich gas generating device is 5-1000g/S, the ventilation pressure is 5-16MPa, and the mass ratio of the introduced oxygen to the methane is 0.15-0.6; in the step S4, the temperature of the generated rich fuel gas is 750-1100K, the pressure of the rich fuel gas is 4-15MPa, and the flow rate of the rich fuel gas is 0-1000 g/S.
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