CN117308141A - Detonation combustion device based on wall microstructure combustion chamber and control method - Google Patents
Detonation combustion device based on wall microstructure combustion chamber and control method Download PDFInfo
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- CN117308141A CN117308141A CN202311488088.1A CN202311488088A CN117308141A CN 117308141 A CN117308141 A CN 117308141A CN 202311488088 A CN202311488088 A CN 202311488088A CN 117308141 A CN117308141 A CN 117308141A
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- combustion chamber
- wall
- fuel
- cooling mechanism
- coolant
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 196
- 238000005474 detonation Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 11
- 239000000446 fuel Substances 0.000 claims abstract description 111
- 238000001816 cooling Methods 0.000 claims abstract description 105
- 239000002826 coolant Substances 0.000 claims abstract description 57
- 239000007800 oxidant agent Substances 0.000 claims description 29
- 230000001590 oxidative effect Effects 0.000 claims description 29
- 239000007921 spray Substances 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000007142 ring opening reaction Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 239000002737 fuel gas Substances 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/14—Gas-turbine plants characterised by the use of combustion products as the working fluid characterised by the arrangement of the combustion chamber in the plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/52—Toroidal combustion chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R7/00—Intermittent or explosive combustion chambers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The invention provides a rotary detonation combustion device based on a wall microstructure, which comprises: the ignition device comprises a combustion chamber, an ignition mechanism, an inner wall cooling mechanism, an outer wall cooling mechanism and a fuel mechanism, wherein the ignition mechanism, the inner wall cooling mechanism, the outer wall cooling mechanism and the fuel mechanism are connected with the combustion chamber; a fuel mechanism for delivering a combustible fuel to the combustion chamber; an ignition mechanism for controlling ignition of a combustible fuel within the combustion chamber; the inner wall cooling mechanism is used for cooling the inner wall of the combustion chamber after the combustible fuel in the combustion chamber is ignited and knocks; and the outer wall cooling mechanism is used for cooling the outer wall of the combustion chamber after the combustible fuel in the combustion chamber ignites and knocks. According to the embodiment of the invention, through the channel, the residence time of the coolant on the inner side wall and the outer side wall can be effectively improved, the coolant is prevented from being blown away by detonation shock waves, the cooling time of a cooling layer can be formed along a long coolant, the local high-temperature high-voltage electricity can be induced to be generated in the combustion chamber after the detonation wave is swept, and the influence of inert coolant on the propagation stability of the detonation wave is improved.
Description
Technical Field
The invention relates to the technical field of detonation combustor heat protection, in particular to a detonation combustor based on a wall microstructure combustor and a control method thereof.
Background
The engine is an important power source device, and the combustion mode rotary knocking in the engine gradually replaces isobaric combustion due to the characteristics of self-pressurization of combustion, high temperature of fuel gas and the like. However, the flow field of the rotary detonation combustion has high-frequency periodic variation, and the flow field of the high-frequency periodic variation can disturb the integrity of coolant at the side wall of the engine, so that the cooling of an air film is invalid, and the cooling efficiency of the engine is reduced.
Disclosure of Invention
In order to solve the above problems, an object of an embodiment of the present invention is to provide a detonation combustion device and a control method based on a wall microstructure combustion chamber.
In a first aspect, an embodiment of the present invention provides a wall microstructure-based rotary detonation combustion device, including: the device comprises an ignition mechanism, a combustion chamber, an inner wall cooling mechanism, an outer wall cooling mechanism and a fuel mechanism;
the ignition mechanism, the inner wall cooling mechanism, the outer wall cooling mechanism and the fuel mechanism are respectively communicated with the combustion chamber, the inner wall cooling mechanism is embedded into the outer wall cooling mechanism, the combustion chamber is positioned between the outer wall cooling mechanism and the inner wall cooling mechanism, the fuel mechanism is positioned at one end, far away from the combustion chamber, of the outer wall cooling mechanism, and the ignition mechanism is arranged on the outer wall cooling mechanism and extends to the combustion chamber;
the fuel mechanism is used for delivering combustible fuel to the combustion chamber;
the ignition mechanism is used for controlling ignition of combustible fuel in the combustion chamber;
the inner wall cooling mechanism is used for cooling the inner wall of the combustion chamber after the combustible fuel in the combustion chamber is ignited and knocks;
the outer wall cooling mechanism is used for cooling the outer wall of the combustion chamber after the combustible fuel in the combustion chamber ignites and knocks.
In a second aspect, an embodiment of the present invention further provides a wall microstructure-based combustion chamber control method, where the method is applied to the rotary detonation combustion device of the first aspect, and the method includes:
injecting the coolant into the inner wall cooling mechanism and the outer wall cooling mechanism respectively, and forming a heat-proof protective film in the combustion chamber;
controlling the injection of the combustible fuel from the fuel mechanism into the combustion chamber;
igniting the ignition mechanism and detonating the combustible fuel in the combustion chamber;
and the combustion products generated by the combustible fuel after detonation are sprayed out from the communication port.
In a third aspect, an embodiment of the present invention further provides an engine, including: the rotary detonation combustion device of the first aspect described above.
In the solutions provided in the first to third aspects of the present application, the fuel mechanism is used to inject the combustible fuel into the combustion chamber, the ignition mechanism is used to ignite the combustible fuel in the combustion chamber and generate knocking, the inner wall of the combustion chamber is cooled and protected by the inner wall cooling mechanism, and the outer wall of the combustion chamber is cooled and protected by the outer wall cooling mechanism. Compared with the mode that the inner wall cooling mechanism and the outer wall cooling mechanism are not arranged in the combustion chamber in the related art and the inner wall and the outer wall of the combustion chamber cannot be cooled, the inner wall cooling mechanism on the inner wall of the combustion chamber and the outer wall cooling mechanism on the outer wall of the combustion chamber can realize heat exchange with the interior of the combustion chamber, and the heat protection effect of the combustion chamber can be further improved.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates a schematic perspective view of a rotary detonation combustion device provided by an embodiment of the present invention;
FIG. 2 is a schematic view showing a longitudinal sectional structure of a rotary detonation combustion device provided by an embodiment of the present invention;
FIG. 3 is a schematic view showing a transverse cross-sectional structure of a rotary detonation combustion device provided by an embodiment of the present invention when the channel is rectangular;
fig. 4 shows a schematic cross-sectional view of a rotary detonation combustion device provided by an embodiment of the present invention when the channels are triangular.
Icon: 10. a combustion chamber; 11. an inner sidewall; 12. a communication port; 13. an outer sidewall; 14. a channel; 15. an inner channel; 16. an inner storage cavity; 17. an inner coolant orifice; 18. an outer passage port; 19. an outer storage cavity; 20. an outer coolant orifice; 21. a fuel ring opening; 22. a fuel chamber; 23. oxidant circumferential seams; 24. a fuel injection hole; 25. an ignition element; 26. a cone.
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The combustion mode in the engine can be divided into detonation and knocking, and as a form of supercharged combustion, knocking combustion has the advantage of high theoretical thermal cycle efficiency, and is widely focused in academia and industry at present. The rotary knocking type fuel is used as a knocking type combustion mode, and has the characteristics of high fuel combustion efficiency, good environmental protection performance, excellent dynamic performance and the like. Therefore, rotary knock engines have gained more and more attention in recent years and have become a new hot spot research direction for engines. However, the rotary knock engine still has a certain problem at present, and the wall surface of the rotary knock engine is easy to bear higher heat load. Therefore, the research on the wall heat protection of the rotary detonation type engine is particularly important, and the heat protection of the rotary detonation type engine is mainly divided into active heat protection and passive heat protection, wherein the film cooling is used as an effective active heat protection technology and is widely popularized and applied in the heat protection of the high heat flow wall.
However, the high-frequency periodic variation of the flow field exists in the combustion chamber of the rotary detonation engine, and the strong high-temperature pressure is easy to disturb and seriously damage the air film protective layer (or the liquid film protective layer) existing on the wall surface, so that the air film protective layer cannot be gathered on the inner wall of the combustion chamber for a long time, and the cooling effect of the inner wall of the combustion chamber is greatly reduced.
In order to solve the above technical problems, the present invention provides the following embodiments:
example 1
The embodiment of the invention provides a rotary detonation combustion device based on a wall microstructure, which is shown in a perspective schematic view of the rotary detonation combustion device in fig. 1, and comprises: an ignition mechanism, a combustion chamber 10, an inner wall cooling mechanism, an outer wall cooling mechanism, and a fuel mechanism; the ignition mechanism, the inner wall cooling mechanism, the outer wall cooling mechanism and the fuel mechanism are respectively communicated with the combustion chamber 10, the inner wall cooling mechanism is embedded into the outer wall cooling mechanism, the combustion chamber 10 is positioned between the outer wall cooling mechanism and the inner wall cooling mechanism, the fuel mechanism is positioned at one end, far away from the combustion chamber 10, of the outer wall cooling mechanism, and the ignition mechanism is mounted on the outer wall cooling mechanism and extends to the combustion chamber 10; the fuel mechanism is used for delivering combustible fuel to the combustion chamber 10; the ignition mechanism is used for controlling ignition of combustible fuel in the combustion chamber 10; the inner wall cooling mechanism is used for cooling the inner wall of the combustion chamber 10 after the combustible fuel in the combustion chamber 10 is ignited and knocks; the outer wall cooling mechanism is used for cooling the outer wall of the combustion chamber 10 after the combustible fuel in the combustion chamber 10 ignites and knocks.
In this embodiment, the combustion chamber 10 is formed by a gap between the inner wall cooling mechanism and the outer wall cooling mechanism, the combustion chamber is of an annular cavity structure as a whole, and only one side of the annular cavity is provided with a communication port 12 communicated with the outside. The inner wall cooling mechanism is composed of two parts, namely a cylindrical structure positioned in the combustion chamber 10 and a conical part 26 extending to the outside through a communication port, wherein the cylindrical structure and the conical part 26 are integrally connected. The high-temperature fuel gas generated after knocking in the combustion chamber 10 is discharged from the communication port 12 along the conical member 26, and the air flow can promote the thrust of the engine when passing through the conical member 26; in particular, the cone 26 is a plug nozzle, which facilitates increasing the expansion of the engine outlet air flow and increasing the engine thrust. The working principle of the plug nozzle belongs to common knowledge in the field, and the principle is not repeated here. It should be noted that the inner wall cooling means is a generic term for all structures on the inner annular wall of the combustion chamber 10 of the annular cavity structure, and therefore, it cannot be understood that the inner wall cooling means is simply a layer of the inner wall in a literal sense, and in fact, the portion of the inner wall cooling means located in the combustion chamber is a cylindrical structure.
In one embodiment, referring to the schematic longitudinal sectional structure of the rotary detonation combustion device shown in fig. 2, the combustion chamber 10 includes: an inner side wall 11 and an outer side wall 13; a plurality of channels 14 are arranged on the inner side wall 11 and the outer side wall 13 of the combustion chamber 10; the coolant of the inner wall cooling mechanism enters the channel 14 of the inner wall 11, the coolant of the outer wall cooling mechanism enters the channel 14 of the outer wall 13, and the combustion products generated after the combustible fuel enters the combustion chamber 10 and knocks are discharged from the communication port 12. Further, the combustion products produced after combustion of different combustible fuels are also different. The combustible fuel in this embodiment may be a gaseous fuel or a liquid fuel, and if the combustible fuel is hydrogen, the combustion product is water; if the combustible fuel is kerosene, the combustion products are carbon dioxide and water.
In the present embodiment, the inner side wall 11 is a surface of the annular cavity structure where the inner ring of the combustion chamber 10 is located, and the outer side wall 13 is a surface of the annular cavity structure where the outer ring of the combustion chamber 10 is located. The channels 14 are distributed in an array along the circumferential direction of the combustion chamber 10, and the channels 14 enable the inner side wall 11 and the outer side wall 13 to form a plurality of microstructures, and the surfaces of the inner side wall 11 and the outer side wall 13 of the combustion chamber 10 are uneven. The channel 14 can play a role in extending the residence time of the coolant and reducing the intensity of detonation wave in the combustion chamber 10, so that the cross-sectional structure of the rotary detonation combustion device when the channel is rectangular as shown in fig. 3 and the cross-sectional structure of the rotary detonation combustion device when the channel is triangular as shown in fig. 4 can be taken as the cross-section of the channel 14, and the specific shape, size and arrangement of the channel 14 are not particularly limited.
In one embodiment, an inner wall cooling mechanism includes: an inner passage 15, an inner reservoir 16 and an inner coolant orifice 17; one end of the inner channel 15 is communicated with the outside, and the other end is communicated with the inner storage cavity 16; one end of the inner coolant spray hole 17 is communicated with the inner storage cavity 16, and the other end is communicated with the combustion chamber 10; the coolant is injected into the inner reserving cavity 16 through the inner passage 15, and the coolant in the inner reserving cavity 16 is injected into the combustion chamber 10 through the inner coolant injection hole 17, so that the coolant of the inner wall cooling mechanism enters into the channel 14 of the inner side wall 11. An outer wall cooling mechanism comprising: an outer passage port 18, an outer reservoir 19 and an outer coolant orifice 20; one end of the outer channel port 18 is communicated with the outside, and the other end is communicated with the outer storage cavity 19; one end of the outer coolant spray hole 20 is communicated with the outer storage cavity 19, and the other end is communicated with the combustion chamber 10; the coolant is injected into the outer storage chamber 19 through the outer passage opening 18, and the coolant in the outer storage chamber 19 is injected into the combustion chamber 10 through the outer coolant injection hole 20, so that the coolant of the outer wall cooling mechanism enters the channel 14 of the outer side wall 13.
In this embodiment, the inner wall cooling mechanism and the outer wall cooling mechanism are both filled with coolant, and the coolant may be either gaseous or liquid and may be selected according to the needs, and the specific medium of the coolant is not limited herein. In particular, the combustible fuel when the combustion chamber 10 knocks and the high-temperature fuel gas generated after combustion have a certain axial velocity, so that large kinetic energy can be generated. Therefore, the inner coolant spray hole 17 and the outer coolant spray hole 20 need to have a certain inclination angle, so that the sprayed coolant can move along the axis direction of the combustion chamber 10, and the coolant can be conveniently diffused along the surfaces of the inner side wall 11 and the outer side wall 13 of the combustion chamber 10, so that a protective layer is formed on the surfaces of the inner side wall 11 and the outer side wall 13 of the combustion chamber 10, and high-temperature fuel gas generated after the combustion of the combustible fuel is isolated from the surfaces of the inner side wall 11 and the outer side wall 13 of the combustion chamber. Meanwhile, based on the grooves 14 distributed in an array on the inner side wall 11 and the outer side wall 13 of the combustion chamber 10, the residence time of the coolant in the inner side wall 11 and the outer side wall 13 of the combustion chamber can be effectively improved, the coolant in the grooves 14 is not easily blown away by detonation shock waves, and the heat protection effect of the inner side wall 11 and the outer side wall 13 is effectively improved; the fuel mechanism is used for injecting the combustible fuel into the combustion chamber 10, the ignition mechanism is used for igniting the combustible fuel in the combustion chamber 10 and generating knocking, the channel 14 can induce the combustion chamber 10 to generate local high-temperature high-voltage electricity after the detonation wave is swept, and the influence of inert coolant on the propagation stability of the detonation wave is improved.
Specifically, the inner coolant orifice 17 needs to be located at the center of the channel 14 of the inner sidewall of the combustion chamber 10, and the outer coolant orifice 20 needs to be located at the center of the channel 14 of the outer sidewall of the combustion chamber 10. The channels 14 can be quickly filled when coolant is conveniently injected into the channels 14 of the combustion chamber 10.
In one embodiment, the fuel mechanism comprises: a fuel ring opening 21, a fuel cavity 22, an oxidant ring slit 23, and fuel injection holes 24; the fuel ring opening 21 is connected to the fuel chamber 22; one end of the fuel spray hole 24 is communicated with the fuel cavity 22, and the other end is communicated with the oxidant circumferential gap 23; the oxidant circumferential gap 23 is communicated with the combustion chamber 10; the oxidant circumferential seam 23 contains an oxidant; the combustible fuel enters the fuel cavity 22 from the fuel ring opening 21, the combustible fuel in the fuel cavity 22 is sprayed into the oxidant circumferential gap 23 from the fuel spray holes 20 and combined with the oxidant contained in the oxidant circumferential gap 23, so as to obtain the combustible fuel doped with the oxidant, and the combustible fuel doped with the oxidant enters the combustion chamber 10 and is ignited by the ignition mechanism. In particular, an oxidant injection hole is arranged between the oxidant circumferential seam and the outside.
In this embodiment, the fuel chamber 22 is a disc-shaped chamber having a certain thickness, the center of the disc-shaped chamber is an inner channel 15 for injecting coolant, and a gap between the inner channel 15 and the disc-shaped fuel chamber is a fuel ring opening 21. Note that the inner passage 15 communicates only with the inner reservoir chamber 16, and the inner passage 15 does not communicate with the fuel chamber 22. Fuel injection holes 24 at the periphery of the combustion chamber 10 can inject combustible fuel into the oxidant circumferential gap 23 at a certain pressure. The oxidant circumferential gap 23 is a structure in which both ends are communicated, one end is communicated with the combustion chamber 10, the other end is communicated with the outside through an oxidant injection hole, and the oxidant can enter the oxidant circumferential gap 23 from the outside through the oxidant injection hole. In particular, the above-mentioned "outside" refers to the "outside" of the rotary detonation combustion device, and the required structure of other engines (which may be aeroengines or marine, vehicular engines) is also outside the rotary detonation combustion device, so that the above-mentioned "outside" is not to be understood as being broadly exposed to the outdoor environment.
In one embodiment, an ignition mechanism includes: a communication pipe and an ignition element 25; one end of the communicating pipe extends to the outer wall of the combustion chamber 10 to communicate with the outside, the other end extends to the combustion chamber 10, and the ignition element 25 is arranged on the communicating pipe; the ignition element 25 releases a high-energy arc and detonates the combustible fuel in the combustion chamber 10, completing an ignition operation.
In the present embodiment, the ignition element 25 includes, but is not limited to: spark plugs, detonation tubes, or plasma igniters.
In summary, in the rotary detonation combustion device based on the wall microstructure provided by the embodiment of the invention, the fuel mechanism is used for injecting the combustible fuel into the combustion chamber, the ignition mechanism is used for igniting the combustible fuel in the combustion chamber 10 and generating detonation, the inner wall cooling mechanism is used for cooling and protecting the inner wall 11 of the combustion chamber, and the outer wall cooling mechanism is used for cooling and protecting the outer wall 13 of the combustion chamber. Compared with the mode that the inner wall cooling mechanism and the outer wall cooling mechanism are not arranged in the combustion chamber and cannot cool the inner wall and the outer wall of the combustion chamber in the related art, the inner wall cooling mechanism on the inner wall 11 of the combustion chamber 10 and the outer wall cooling mechanism on the outer wall 13 of the combustion chamber 10 can realize heat exchange with the inside of the combustion chamber 10, and the heat protection effect of the combustion chamber 10 can be further improved.
Example 2
The embodiment of the invention also provides a wall microstructure-based combustion chamber control method, which is applied to the rotary detonation combustion device in the embodiment 1, and comprises the following steps:
injecting the coolant into the inner wall cooling mechanism and the outer wall cooling mechanism, respectively, and forming a heat-shielding protective film in the combustion chamber 10;
controlling the injection of the combustible fuel from the fuel mechanism into the combustion chamber 10;
igniting the ignition mechanism and detonating the combustible fuel in the combustion chamber 10;
combustion products generated by the combustible fuel after detonation are ejected from the communication ports 12.
In summary, according to the wall microstructure-based combustion chamber control method provided by the embodiment of the present invention, the fuel mechanism is used for injecting the combustible fuel into the combustion chamber, the ignition mechanism is used for igniting the combustible fuel in the combustion chamber 10 and generating knocking, the inner wall cooling mechanism is used for cooling and protecting the inner wall 11 of the combustion chamber, and the outer wall cooling mechanism is used for cooling and protecting the outer wall 13 of the combustion chamber. Compared with the mode that the inner wall cooling mechanism and the outer wall cooling mechanism are not arranged in the combustion chamber and cannot cool the inner wall and the outer wall of the combustion chamber in the related art, the inner wall cooling mechanism on the inner wall 11 of the combustion chamber 10 and the outer wall cooling mechanism on the outer wall 13 of the combustion chamber 10 can realize heat exchange with the inside of the combustion chamber 10, and the heat protection effect of the combustion chamber 10 can be further improved.
Example 3
The embodiment of the invention also discloses an engine, which comprises the rotary detonation combustion device provided by the embodiment 1. Therefore, the engine has all the technical effects of the above embodiment 1 and will not be repeated here.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art can easily think about variations or alternatives within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A wall microstructure-based rotary detonation combustion device, the device comprising: the device comprises an ignition mechanism, a combustion chamber, an inner wall cooling mechanism, an outer wall cooling mechanism and a fuel mechanism;
the ignition mechanism, the inner wall cooling mechanism, the outer wall cooling mechanism and the fuel mechanism are respectively communicated with the combustion chamber, the inner wall cooling mechanism is embedded into the outer wall cooling mechanism, the combustion chamber is positioned between the outer wall cooling mechanism and the inner wall cooling mechanism, the fuel mechanism is positioned at one end, far away from the combustion chamber, of the outer wall cooling mechanism, and the ignition mechanism is arranged on the outer wall cooling mechanism and extends to the combustion chamber;
the fuel mechanism is used for delivering combustible fuel to the combustion chamber;
the ignition mechanism is used for controlling ignition of combustible fuel in the combustion chamber;
the inner wall cooling mechanism is used for cooling the inner wall of the combustion chamber after the combustible fuel in the combustion chamber is ignited and knocks;
the outer wall cooling mechanism is used for cooling the outer wall of the combustion chamber after the combustible fuel in the combustion chamber ignites and knocks.
2. The rotary detonation combustion device of claim 1, wherein the combustion chamber comprises: an inner sidewall, a communication port, and an outer sidewall;
a plurality of channels are formed in the inner side wall and the outer side wall of the combustion chamber;
the communication port is communicated with the outside;
the coolant of the inner wall cooling mechanism enters the channel of the inner wall, the coolant of the outer wall cooling mechanism enters the channel of the outer wall, and combustion products generated after the combustible fuel enters the combustion chamber and knocks are discharged from the communication port.
3. The rotary detonation combustion device of claim 2, wherein the inner wall cooling mechanism comprises: an inner channel, an inner storage chamber and an inner coolant orifice;
one end of the inner channel is communicated with the outside, and the other end of the inner channel is communicated with the inner storage cavity;
one end of the inner coolant spray hole is communicated with the inner storage cavity, and the other end of the inner coolant spray hole is communicated with the combustion chamber;
the coolant is injected into the inner storage cavity through the inner channel, and the coolant in the inner storage cavity is sprayed into the combustion chamber through the inner coolant spray hole, so that the coolant of the inner wall cooling mechanism enters the channel of the inner side wall.
4. The rotary detonation combustion device of claim 3, wherein the outer wall cooling mechanism comprises: an outer passage port, an outer storage chamber and an outer coolant spray orifice;
one end of the outer channel opening is communicated with the outside, and the other end of the outer channel opening is communicated with the outer storage cavity;
one end of the outer coolant spray hole is communicated with the outer storage cavity, and the other end of the outer coolant spray hole is communicated with the combustion chamber;
the coolant is injected into the outer storage cavity through the outer channel opening, and the coolant in the outer storage cavity is sprayed into the combustion chamber through the outer coolant spray hole, so that the coolant of the outer wall cooling mechanism enters the channel of the outer side wall.
5. The rotary detonation combustor of claim 4, wherein an end of the outer coolant orifice connected to the combustion chamber is located at a center of the channel disposed on the outer sidewall of the combustion chamber and an end of the inner coolant orifice connected to the combustion chamber is located at a center of the channel on the inner sidewall of the combustion chamber.
6. The rotary detonation combustion device of claim 1, wherein the fuel mechanism comprises: the fuel ring opening, the fuel cavity, the oxidant circumferential seam and the fuel spray hole;
the fuel ring opening is connected with the fuel cavity;
one end of the fuel spray hole is communicated with the fuel cavity, and the other end of the fuel spray hole is communicated with the oxidant circumferential seam;
the oxidant circumferential seam is communicated with the combustion chamber;
the oxidant circumferential seam contains an oxidant;
the combustible fuel enters the fuel cavity from the fuel ring opening, the combustible fuel in the fuel cavity is sprayed into the oxidant circumferential gap from the fuel spray hole and combined with the oxidant contained in the oxidant circumferential gap to obtain the combustible fuel doped with the oxidant, and the combustible fuel doped with the oxidant enters the combustion chamber and is ignited by the ignition mechanism.
7. The rotary detonation combustion device of claim 1, wherein the ignition mechanism comprises: a communication tube and an ignition element;
one end of the communicating pipe extends to the outer wall of the combustion chamber to be communicated with the outside, the other end of the communicating pipe extends to the combustion chamber, and the ignition element is arranged on the communicating pipe;
the ignition element releases a high energy arc and detonates the combustible fuel in the combustion chamber, completing an ignition operation.
8. The rotary detonation combustion device according to claim 2, wherein a taper member is provided on a surface of the inner wall cooling mechanism on a side facing in a direction of opening of the communication port.
9. A wall microstructure-based combustion chamber control method applied to the rotary detonation combustion device of any of the preceding claims 1-8, characterized in that the method comprises:
injecting the coolant into the inner wall cooling mechanism and the outer wall cooling mechanism respectively, and forming a heat-proof protective film in the combustion chamber;
controlling the injection of the combustible fuel from the fuel mechanism into the combustion chamber;
igniting the ignition mechanism and detonating the combustible fuel in the combustion chamber;
and the combustion products generated by the combustible fuel after detonation are sprayed out from the communication port.
10. An engine, comprising: a rotary detonation combustion device as defined in any one of claims 1 to 8.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117552891A (en) * | 2024-01-12 | 2024-02-13 | 清华大学 | Rotary knocking engine based on wall surface multiple concave cavities and pits and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117552891A (en) * | 2024-01-12 | 2024-02-13 | 清华大学 | Rotary knocking engine based on wall surface multiple concave cavities and pits and control method |
| CN117552891B (en) * | 2024-01-12 | 2024-03-22 | 清华大学 | Rotary knocking engine based on wall surface multiple concave cavities and pits and control method |
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