CN113514251A - Engine combustion chamber high-temperature exhaust experimental device based on dual-fuel multi-stage combustion - Google Patents
Engine combustion chamber high-temperature exhaust experimental device based on dual-fuel multi-stage combustion Download PDFInfo
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- CN113514251A CN113514251A CN202110833803.5A CN202110833803A CN113514251A CN 113514251 A CN113514251 A CN 113514251A CN 202110833803 A CN202110833803 A CN 202110833803A CN 113514251 A CN113514251 A CN 113514251A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
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Abstract
The invention provides a high-temperature exhaust experimental device for a combustion chamber of an engine based on dual-fuel multi-stage combustion, which comprises a combustion section, an experimental section and an exhaust section which are sequentially arranged, wherein the combustion section, the experimental section and the exhaust section are mutually communicated, an air inlet is arranged at one end of the combustion section, which is far away from the experimental section, a combustion chamber is arranged in the combustion section, a plurality of honeycomb briquettes are arranged in the combustion chamber, a fuel pipeline is arranged at one end of the combustion section, which is close to the experimental section, and is communicated with the combustion chamber, the fuel pipeline penetrates through the experimental section, a mounting hole for inserting a test piece is arranged on the experimental section, a mounting cover for sealing the mounting hole is arranged at the position of the mounting hole, and a cooling device is arranged on the exhaust section. The experimental device can simulate the exhaust working condition at higher temperature, and does not need a high-temperature electric heating furnace with high cost to heat air; the device has the advantages of no complex pipeline, simple structure, low cost, easy maintenance and convenient control.
Description
Technical Field
The invention relates to the technical field of combustion equipment, in particular to an engine combustion chamber high-temperature exhaust experimental device based on dual-fuel multi-stage combustion.
Background
As the development requirements of engine combustion chambers continue to increase, the temperature of the exhaust at the outlet of the combustion chamber continues to increase, and the combustion chamber will operate at higher pressure ratios and temperatures. During the development of engine combustion chambers, it is often necessary to test the combustion performance of a propellant by burning it several times in the engine combustion chamber. However, the existing experimental device selects a large amount of high-pressure cooling water to cool the combustion chamber, only has primary combustion, and the temperature cannot meet the experimental requirements. The air heating device at the front end of the combustion chamber is too large, and a pipeline with the length of more than 20m is arranged between the air heating device and the combustion chamber, so that the temperature loss along the way is huge. The test cost is high, the structure is complex, the control is not convenient, and the whole test period is long, so that the research and development are difficult.
Disclosure of Invention
In view of the above, the problem to be solved by the present invention is to provide an engine combustion chamber high temperature exhaust experimental device based on dual-fuel multi-stage combustion, which can simulate higher temperature exhaust working conditions without high cost high temperature electric heating furnace to heat air; the device has the advantages of no complex pipeline, simple structure, low cost, easy maintenance and convenient control. And provides sufficient and necessary cooling effect and safety guarantee for the development and driving protection of the engine combustion chamber in other application fields.
The invention solves the technical problems by the following technical means: the invention provides a high-temperature exhaust experimental device for a combustion chamber of an engine based on dual-fuel multi-stage combustion, which comprises a combustion section, an experimental section and an exhaust section which are sequentially arranged, wherein the combustion section, the experimental section and the exhaust section are mutually communicated, an air inlet is arranged at one end of the combustion section, which is far away from the experimental section, a combustion chamber is arranged in the combustion section, a plurality of honeycomb briquettes are arranged in the combustion chamber, a fuel pipeline is arranged at one end of the combustion section, which is close to the experimental section, and is communicated with the combustion chamber, the fuel pipeline penetrates through the experimental section, a mounting hole for inserting a test piece is arranged on the experimental section, a mounting cover for sealing the mounting hole is arranged at the position of the mounting hole, and a cooling device is arranged on the exhaust section.
Further, the combustion chamber is including intercommunication one-level combustion chamber and second grade combustion chamber, the honeycomb briquette sets up in one-level combustion chamber, the oil-out of burning oil pipe way sets up in the second grade combustion chamber, be provided with atomizing nozzle on the oil-out, the second grade combustion chamber sets up to the toper form, the minor diameter end of second grade combustion chamber is close to the experimental section.
Further, the air inlet is connected with an air blower, the secondary combustion chamber is also communicated with an air adding port, and the air adding port is connected with an oxygen supply device.
Further, the part of the fuel pipeline penetrating through the experimental section is arranged in a cavity of the experimental section in a serpentine heat exchanger mode, and the test piece is installed at a position close to the serpentine heat exchanger.
Furthermore, the inner walls of the combustion section and the experiment section are provided with a refractory coating and a high-temperature resistant coating.
Furthermore, the combustion chamber is made of high-temperature-resistant cement, and refractory bricks are arranged on the inner wall of the experimental section.
Further, be provided with the heat-resistant layer on the inner wall of exhaust section, cooling device is including enclosing the cooling chamber of establishing on the exhaust section, be connected with a plurality of circulating line on the cooling chamber, still be connected with the air-cooler on the cooling chamber, the exhaust section is including the one section of exhaust and the exhaust two-stage section of intercommunication, the one section of exhaust and the exhaust two-stage section use independent cooling device respectively.
Further, atomizing nozzle includes the nozzle main part, the both ends of nozzle main part are provided with the loudspeaker form feed inlet and the discharge gate of symmetry respectively, feed inlet and discharge gate are through first passageway intercommunication, it runs through still to be provided with a plurality of slants in the nozzle main part the second passageway of nozzle main part, it is a plurality of the second passageway is umbelliform and distributes, and is a plurality of the second passageway cross in first passageway with the junction of discharge gate, it is a plurality of the second passageway disperse with the bottom edge of nozzle main part.
According to the technical scheme, the invention has the beneficial effects that: the invention provides a high-temperature exhaust experimental device for a combustion chamber of an engine based on dual-fuel multi-stage combustion, which comprises a combustion section, an experimental section and an exhaust section which are sequentially arranged, wherein the combustion section, the experimental section and the exhaust section are mutually communicated, an air inlet is arranged at one end of the combustion section, which is far away from the experimental section, a combustion chamber is arranged in the combustion section, a plurality of honeycomb briquettes are arranged in the combustion chamber, a fuel pipeline is arranged at one end of the combustion section, which is close to the experimental section, and is communicated with the combustion chamber, the fuel pipeline penetrates through the experimental section, a mounting hole for inserting a test piece is arranged on the experimental section, a mounting cover for sealing the mounting hole is arranged at the position of the mounting hole, and a cooling device is arranged on the exhaust section. The experimental device can simulate the exhaust working condition at higher temperature, and does not need a high-temperature electric heating furnace with high cost to heat air; the device has the advantages of no complex pipeline, simple structure, low cost, easy maintenance and convenient control. And provides sufficient and necessary cooling effect and safety guarantee for the development and driving protection of the engine combustion chamber in other application fields.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a perspective view of a high-temperature exhaust experimental device for a combustion chamber of an engine based on dual-fuel multi-stage combustion, provided by the invention;
FIG. 2 is a schematic diagram of a combustion section of a high-temperature exhaust experimental device of a combustion chamber of an engine based on dual-fuel multi-stage combustion, provided by the invention;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a cross-sectional view from another perspective of FIG. 2;
FIG. 5 is a schematic diagram of a test section of a high-temperature exhaust experimental device of a combustion chamber of an engine based on dual-fuel multi-stage combustion, provided by the invention;
FIG. 6 is a cross-sectional view of FIG. 5;
FIG. 7 is a schematic diagram of an exhaust section of a high-temperature exhaust experimental device for a combustion chamber of an engine based on dual-fuel multi-stage combustion, provided by the invention;
FIG. 8 is a cross-sectional view of FIG. 7;
FIG. 9 is a schematic diagram of an atomizing nozzle of the high-temperature exhaust experimental device for the combustion chamber of the engine based on dual-fuel multi-stage combustion provided by the invention.
Reference numerals: 1-a combustion section; 2-experimental section; 3-an exhaust section; 4-an atomizing nozzle; 11-an air inlet; 12-a blower; 13-a primary combustion chamber; 14-a secondary combustion chamber; 131-honeycomb briquette; 141-a fuel line; 21-mounting port; 22-mounting a cover; 31-a cooling device; 32-exhaust section; 33-two exhaust stages; 142-a serpentine heat exchanger; 311-a cooling chamber; 312-an air cooler; 41-a discharge hole; 42-a feed inlet; 43-a first channel; 44-second channel.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1 to 9, the invention provides a high-temperature exhaust experimental device for a combustion chamber of an engine based on dual-fuel multi-stage combustion, which comprises a combustion section 1, an experimental section 2 and an exhaust section 3 which are sequentially arranged, wherein the combustion section 1, the experimental section 2 and the exhaust section 3 are mutually communicated, one end of the combustion section 1, which is far away from the experimental section 2, is provided with an air inlet 11, a combustion chamber is arranged in the combustion section 1, a plurality of honeycomb briquettes 131 are arranged in the combustion chamber, one end of the combustion section 1, which is close to the experimental section 2, is provided with a fuel pipeline 141, the fuel pipeline 141 is communicated with the combustion chamber, the fuel pipeline 141 penetrates through the experimental section 2, the experimental section 2 is provided with an installation port 21 for inserting a test piece, an installation cover 22 for sealing the installation port 21 is arranged at the position of the installation port 21, and the exhaust section 3 is provided with a cooling device 31. The experimental device can simulate the exhaust working condition at higher temperature, and does not need a high-temperature electric heating furnace with high cost to heat air; the device has the advantages of no complex pipeline, simple structure, low cost, easy maintenance and convenient control. And provides sufficient and necessary cooling effect and safety guarantee for the development and driving protection of the engine combustion chamber in other application fields.
Compared with the conventional experimental device, the heat insulation and heat preservation device can insulate heat and preserve heat without cooling by cooling water; the multi-stage combustion chambers are adjacent, and coal is selected as a combustion improver, so that the device is energy-saving compared with a large-scale simulation device, reduces heat loss, and is simpler in structure, small in occupied area, flexible in test period and more than 100 times lower in cost. The device can provide a safe and stable combustion environment after fuel atomization, realize multi-working-condition simulation of engine combustion chamber exhaust, test the heat resistance and heat exchange performance of hot end parts at the exhaust position of the combustion chamber in a strong hot environment, and realize simulation in occasions such as aircraft engines, thermal power plants, ship power devices and the like.
As a further improvement of the technical scheme, the combustion chamber comprises a first combustion chamber 13 and a secondary combustion chamber 14 which are communicated, the honeycomb briquette 131 is arranged in the first combustion chamber 13, an oil outlet of the fuel oil pipeline 141 is arranged in the secondary combustion chamber 14, an atomizing nozzle is arranged on the oil outlet, the secondary combustion chamber 14 is in a conical shape, and the small-diameter end of the secondary combustion chamber 14 is close to the experimental section 2. The gas outlet of the secondary combustion chamber 14 is set to be a rectangular narrow opening, the combustion chambers are set to be a first combustion chamber 13 and a secondary combustion chamber 14 which are communicated, the multistage combustion chambers are adjacent, coal is selected as a combustion improver, the coal in the coal combustion chambers is ignited and supported by a high-flow blower 12, the coal gas after full combustion is discharged to the secondary combustion chamber 14 and is subjected to combustion reaction with atomized fuel oil in the secondary combustion chamber 14, so that a high-speed high-temperature environment is formed in a flow passage at the tail of the combustion chamber, and the function of simulating the exhaust of the combustion chamber of the engine is realized. Coal is used as fuel in the first combustion chamber 13, high-temperature gas of 1000 ℃ is generated under the condition that combustion improver is sufficient, the high-temperature gas is introduced into the secondary combustion chamber 14 to be sufficiently combusted with high-temperature gas, the temperature of the high-temperature gas is further increased, the combustion chamber generates high-temperature gas flow of 2000 ℃, the secondary combustion chamber 14 is arranged to be in a conical shape, so that a high-speed high-temperature environment is formed in a tail runner of the secondary combustion chamber 14, and the exhaust simulation function of the combustion chamber of the engine is realized.
As a further improvement to the above technical solution, a blower 12 is connected to the air inlet 11, and the blower 12 is provided with a flow rate of 1500m3The secondary combustion chamber 14 is also communicated with an air inlet which is connected with an oxygen supply device. High-pressure air is introduced into the combustion chamber by arranging the high-pressure cyclone fan on the air inlet 11, so that the combustion efficiency of the combustion chamber is increased, the honeycomb briquette 131 can be sufficiently combusted, and sufficient high-temperature gas can be provided for igniting aviation fuel. Meanwhile, an air adding port is added in the secondary combustion chamber 14, and oxygen can be introduced through the air adding port to support combustion as required, so that fuel oil can be fully combusted with high-temperature fuel gas combusted with coal.
As a further improvement to the technical scheme, the part of the fuel oil pipeline 141 passing through the experimental section 2 is arranged in the form of a serpentine heat exchanger 142 in a cavity of the experimental section 2, and the test piece is installed at a position close to the serpentine heat exchanger 142. Run through experimental section 2 with fuel pipeline 141 and set up to snakelike heat exchanger 142 form at experimental section 2 for then pass experimental section 2 before getting into the combustion chamber, thereby carry out the heat transfer and preheat fuel in experimental section 2, then guarantee the abundant burning of fuel in spouting the combustion chamber through the atomizing nozzle of high performance, make the combustion chamber can produce the high temperature air current of 2000 degrees. Therefore, a safe and stable combustion environment after atomization is provided, and meanwhile, the temperature of the combustion environment is controlled by controlling the air inflow and the air inflow of the air inlet 11, so that the simulation of multiple exhaust working conditions of the engine combustion chamber is realized.
As a further improvement to the technical scheme, the inner walls of the combustion section 1 and the experimental section 2 are provided with a refractory coating and a high-temperature resistant coating. The combustion chamber is made of high-temperature-resistant cement, and refractory bricks are arranged on the inner wall of the experimental section 2. The combustion section 1 is fixedly supported by high-temperature cement, a high-temperature heat-insulating refractory material with high degree of freedom is adopted in a high-temperature flow channel of the combustion chamber and the experimental section 2, and a high-temperature-resistant coating and the refractory material are combined for protection, so that impact water cooling can be omitted, and high-efficiency heat insulation can be realized. High-temperature resistant coatings and heat insulation materials are selected in the combustion chamber and the high-temperature flow channel to protect the combustion chamber and the flow channel and prevent the combustion chamber from melting at high temperature.
As a further improvement to the above technical solution, a heat-resistant layer is provided on the inner wall of the exhaust section 3, the cooling device 31 includes a cooling cavity 311 defined on the exhaust section 3, the cooling cavity 311 is connected with a plurality of circulation pipelines, the cooling cavity 311 is further connected with an air cooler 312, the exhaust section 3 includes a first exhaust section 32 and a second exhaust section 33 which are communicated with each other, and the first exhaust section 32 and the second exhaust section 33 respectively use independent cooling devices 31.
As a further improvement to the above technical scheme, the atomizing nozzle includes a nozzle main body, the both ends of nozzle main body are provided with the loudspeaker form feed inlet and the discharge gate of symmetry respectively, feed inlet and discharge gate are through first passageway intercommunication, it runs through still to be provided with a plurality of slants in the nozzle main body the second passageway of nozzle main body, and is a plurality of the second passageway is umbelliform and distributes, and is a plurality of the second passageway intersect in first passageway with the junction of discharge gate, it is a plurality of the second passageway disperse with the bottom edge of nozzle main body. When the liquid fluid flows through the joint of the first channel and the discharge hole, the liquid fluid and the gaseous fluid form violent impact to generate a resonance effect, so that the atomization of the liquid fluid is realized. By accurately controlling the pressure difference, the particle size of the atomized liquid fluid can be accurately controlled. Due to the increased aperture of the first channel, the pressure required to be supplied to the liquid fluid is reduced, thereby greatly reducing cost consumption.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. The utility model provides an engine combustion chamber high temperature exhaust experimental apparatus based on dual fuel multistage burning which characterized in that: comprises a combustion section (1), an experiment section (2) and an exhaust section (3) which are arranged in sequence, the combustion section (1), the experiment section (2) and the exhaust section (3) are communicated with each other, an air inlet (11) is arranged at one end of the combustion section (1) far away from the experimental section (2), a combustion chamber is arranged in the combustion section (1), a plurality of honeycomb briquettes (131) are arranged in the combustion chamber, one end of the combustion section (1) close to the experimental section (2) is provided with a fuel pipeline (141), the fuel pipeline (141) is communicated with the combustion chamber, the fuel pipeline (141) penetrates through the experimental section (2), the experimental section (2) is provided with a mounting opening (21) for inserting a test piece, the mounting opening (21) is provided with a mounting cover (22) for sealing the mounting opening (21), and the exhaust section (3) is provided with a cooling device (31).
2. The engine combustor high-temperature exhaust experimental device based on dual-fuel multi-stage combustion as claimed in claim 1, is characterized in that: the combustion chamber is including communicateing first combustion chamber (13) and second grade combustion chamber (14), honeycomb briquette (131) set up in first combustion chamber (13), the oil-out of fuel oil pipeline (141) sets up in second grade combustion chamber (14), be provided with atomizing nozzle on the oil-out, second grade combustion chamber (14) set up to the toper form, the minor diameter end of second grade combustion chamber (14) is close to experimental section (2).
3. The engine combustor high-temperature exhaust experimental device based on dual-fuel multi-stage combustion as claimed in claim 2, is characterized in that: the air inlet (11) is connected with an air blower (12), the secondary combustion chamber (14) is also communicated with an air inlet, and the air inlet is connected with an oxygen supply device.
4. The engine combustor high-temperature exhaust experimental device based on dual-fuel multi-stage combustion as claimed in claim 1, is characterized in that: the fuel pipeline (141) penetrates through the part of the experimental section (2), the fuel pipeline is arranged in a cavity of the experimental section (2) in a serpentine heat exchanger (142) mode, and the test piece is installed at a position close to the serpentine heat exchanger (142).
5. The engine combustor high-temperature exhaust experimental device based on dual-fuel multi-stage combustion as claimed in claim 1, is characterized in that: and the inner walls of the combustion section (1) and the experimental section (2) are provided with a refractory coating and a high-temperature resistant coating.
6. The engine combustor high-temperature exhaust experimental device based on dual-fuel multi-stage combustion as claimed in claim 5, is characterized in that: the combustion chamber is made of high-temperature-resistant cement, and refractory bricks are arranged on the inner wall of the experimental section (2).
7. The engine combustor high-temperature exhaust experimental device based on dual-fuel multi-stage combustion as claimed in claim 1, is characterized in that: be provided with the heat-resistant layer on the inner wall of exhaust section (3), cooling device (31) are including enclosing cooling chamber (311) of establishing on exhaust section (3), be connected with a plurality of circulating line on cooling chamber (311), still be connected with air-cooler (312) on cooling chamber (311), exhaust section (3) are including one section (32) and exhaust two-stage section (33) of exhaust of intercommunication, independent cooling device (31) are used respectively in one section (32) and the exhaust two-stage section (33) of exhaust.
8. The engine combustor high-temperature exhaust experimental device based on dual-fuel multi-stage combustion as claimed in claim 3, is characterized in that: atomizing nozzle includes the nozzle main part, the both ends of nozzle main part are provided with the loudspeaker form feed inlet and the discharge gate of symmetry respectively, feed inlet and discharge gate are through first passageway intercommunication, it runs through still to be provided with a plurality of slants in the nozzle main part the second passageway of nozzle main part, it is a plurality of the second passageway is umbelliform and distributes, and is a plurality of the second passageway cross in first passageway with the junction of discharge gate, it is a plurality of the second passageway disperse with the bottom edge of nozzle main part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110833803.5A CN113514251A (en) | 2021-07-23 | 2021-07-23 | Engine combustion chamber high-temperature exhaust experimental device based on dual-fuel multi-stage combustion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110833803.5A CN113514251A (en) | 2021-07-23 | 2021-07-23 | Engine combustion chamber high-temperature exhaust experimental device based on dual-fuel multi-stage combustion |
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