CN115325570B - Thermoacoustic oscillation diaphragm type passive control device for annular combustion chamber - Google Patents
Thermoacoustic oscillation diaphragm type passive control device for annular combustion chamber Download PDFInfo
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- CN115325570B CN115325570B CN202210980337.8A CN202210980337A CN115325570B CN 115325570 B CN115325570 B CN 115325570B CN 202210980337 A CN202210980337 A CN 202210980337A CN 115325570 B CN115325570 B CN 115325570B
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- annular
- combustion chamber
- distribution chamber
- wall
- chamber
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 68
- 230000010355 oscillation Effects 0.000 title claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 6
- 238000011160 research Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 238000013016 damping Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—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
- 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
- F23R3/60—Support structures; Attaching or mounting means
-
- 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
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/00013—Reducing thermo-acoustic vibrations by active means
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 discloses a thermoacoustic oscillation baffle type passive control device of an annular combustion chamber, which relates to the technical field of aero-engine and gas turbine research and comprises the following components: the upper connecting flange is provided with a combustion chamber inner wall and a combustion chamber outer wall above; the space between the inner wall of the combustion chamber and the outer wall of the combustion chamber forms an annular combustion chamber; the lower connecting flange is connected below the upper connecting flange, the lower connecting flange is provided with an annular air distribution chamber, a partition plate can be detachably arranged in the annular air distribution chamber, an air inlet pipe is arranged on the side wall of the annular air distribution chamber, and the annular air distribution chamber is communicated with the annular combustion chamber through a rotational flow air nozzle. According to the invention, the partition plates are arranged in the annular gas distribution chamber, so that the problem of circumferential thermo-acoustic instability in the annular combustion chamber can be effectively solved under the action of centrifugal force, and the number and the relative positions of the partition plates can be increased or reduced by detachably connecting the partition plates in the annular gas distribution chamber, so that the passive control of circumferential thermo-acoustic oscillation can be realized.
Description
Technical Field
The invention relates to the technical field of aero-engine and gas turbine research, in particular to a thermoacoustic oscillation baffle type passive control device for an annular combustion chamber.
Background
Thermoacoustic oscillations are frequently occurring in combustion processes of gas turbine engines, ramjet engines, utility boilers and the like, and can bring about a number of adverse effects, which can lead to high-amplitude oscillations of additional pressure, flow fields and flames, increase thermal loads, exacerbate the generation of pollutants, and affect the normal operation of combustion chambers and systems. When the pressure oscillation frequency in the combustion chamber is consistent with the natural frequency of the sound field of the combustion chamber, the combustion chamber resonates, and serious damage and destruction of system components are easily caused.
At present, the thermo-acoustic oscillation control technology is mainly divided into passive control and active control. Passive control includes installing resonators, fuel supply staging, optimizing fuel and air mixing, optimizing nozzle and combustor geometry, and the like. The active control suppresses noise through a control system consisting of a sensor, a controller and an actuator. The control degree of the traditional thermo-acoustic oscillation passive control method is limited greatly, and the traditional thermo-acoustic oscillation passive control method is effective only under a certain range of operation conditions and has poor effect.
Therefore, how to provide a passive control device for controlling the thermoacoustic vibration of the annular combustion chamber and achieving a better control effect of the thermoacoustic vibration baffle type of the annular combustion chamber is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a thermoacoustic oscillation baffle type passive control device for an annular combustion chamber, which aims to solve the problems in the prior art, realize passive control of thermoacoustic oscillation in the annular combustion chamber, and achieve better control effect.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an annular combustor thermoacoustic oscillating diaphragm type passive control device comprising:
the upper connecting flange is provided with a combustion chamber inner wall and a combustion chamber outer wall above; the space between the inner wall of the combustion chamber and the outer wall of the combustion chamber forms an annular combustion chamber;
the lower connecting flange is connected below the upper connecting flange, the lower connecting flange is provided with an annular air distribution chamber, a partition plate is detachably arranged in the annular air distribution chamber, an air inlet pipe is arranged on the side wall of the annular air distribution chamber, and the annular air distribution chamber is communicated with the annular combustion chamber through a rotational flow air nozzle.
Further, the outer wall of the annular air distribution chamber is wound with a cooling pipe.
Further, the bottom of the partition plate is connected with positioning nails, a plurality of positioning holes are formed in the bottom of the annular air distribution chamber, the positioning holes are distributed in an annular array at the central position of the annular air distribution chamber, and the positioning nails are detachably arranged in the positioning holes.
Further, a plurality of swirl air nozzles are arranged, and the swirl air nozzles are distributed at the bottom of the annular combustion chamber in an annular array.
Further, the baffle is the aluminium system flat board, aluminium system flat board is provided with a plurality of, and a plurality of aluminium system flat board interval is installed in annular distribution chamber.
Further, the baffle is the box structure, and the central point of box puts and has the through-hole, the baffle is provided with a plurality of, and a plurality of the baffle is installed at annular distribution chamber with interval.
Further, the baffle is double-deck porous welt, double-deck porous welt is provided with a plurality of, and a plurality of double-deck porous welt is installed in annular distribution chamber with interval.
Compared with the prior art, the invention discloses the annular combustion chamber thermoacoustic oscillation baffle type passive control device, which can effectively improve the problem of circumferential thermoacoustic instability in the annular combustion chamber under the action of centrifugal force by arranging the baffle in the annular gas distribution chamber, and can realize the passive control of circumferential thermoacoustic oscillation by increasing or reducing the number and the installation positions of the baffle as the baffle is detachably connected in the annular gas distribution chamber.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a partial cross-sectional view of an annular combustor thermoacoustic oscillation diaphragm type passive control device provided by the invention;
FIG. 2 is a schematic view of an annular gas distribution chamber and a swirl gas nozzle of the thermoacoustic oscillation baffle type passive control device of the annular combustion chamber;
FIG. 3 is a schematic view of the baffle installation of the annular combustor thermoacoustic oscillation baffle type passive control device provided by the invention;
FIG. 4 is a top view of an annular gas distribution chamber with a baffle plate installed on an annular combustion chamber thermoacoustic oscillation baffle plate type passive control device provided by the invention;
FIG. 5 is a top view of an annular combustor of the thermoacoustic oscillating diaphragm type passive control device for an annular combustor provided by the invention;
FIG. 6 is a schematic view of a diaphragm type passive control device diaphragm (BF) for a thermoacoustic oscillation of an annular combustion chamber provided by the present invention;
FIG. 7 is a schematic view of a baffle plate type passive control device baffle plate (HR) of the thermoacoustic oscillation baffle plate type annular combustion chamber provided by the invention;
FIG. 8 is a schematic view of a diaphragm type passive control device Diaphragm (DP) of the annular combustor thermoacoustic oscillation provided by the present invention;
FIG. 9 is a schematic view of a specific installation mode of a baffle plate of a thermoacoustic oscillation baffle plate type passive control device of an annular combustion chamber provided by the invention;
FIG. 10 is a schematic diagram of the results of the test of the thermoacoustic oscillation amplitude of the thermoacoustic oscillation diaphragm type passive control device for the annular combustion chamber according to the circumferential arrangement of three diaphragms.
Wherein: 1 is an upper connecting flange; 2 is the inner wall of the combustion chamber; 3 is the outer wall of the combustion chamber; 4 is an annular combustion chamber; 5 is a lower connecting flange; 6 is an annular air distribution chamber; 7 is a separator; 8 is an air inlet pipe; 9 is a rotational flow air nozzle; 10 is a cooling tube; 11 is a positioning nail; and 12 is a positioning hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-10, an embodiment of the present invention discloses a thermoacoustic oscillating diaphragm type passive control device for an annular combustion chamber, comprising:
the upper connecting flange 1 is provided with a combustion chamber inner wall 2 and a combustion chamber outer wall 3 above the upper connecting flange 1; the space of the inner combustion chamber wall 2 and the outer combustion chamber wall 3 forms an annular combustion chamber 4; wherein the height of the outer wall 3 of the combustion chamber is higher than the height of the inner wall 2 of the combustion chamber, the inner wall 2 of the combustion chamber and the outer wall 3 of the combustion chamber are quartz tubes, the inner wall 2 of the combustion chamber is a quartz tube with the height of 112mm in the embodiment, and the outer wall 3 of the combustion chamber is a quartz tube with the height of 400 mm.
The lower flange 5, the lower flange 5 is connected in the below of last flange 1, lower flange 5 and go up flange 1 bottom bolted connection, lower flange 5 has annular air distribution chamber 6, the inside baffle 7 that can be dismantled of annular air distribution chamber 6 installs, annular air distribution chamber 6 lateral wall is provided with intake pipe 8, intake pipe 8 is provided with eight in this embodiment, eight intake pipes 8 are the annular array and lay on annular combustion chamber 4's inside wall, annular air distribution chamber 6 communicates with annular combustion chamber 4 through whirl jet 9.
The outer wall of the annular air distribution chamber 6 is wound with a cooling pipe 10. And grooves for installing the cooling pipes 10 are formed on the outer wall of the annular air distribution chamber 6 along the circumferential direction of the annular air distribution chamber 6, the grooves are semicircular, and the diameters of the grooves are the same as those of the cooling pipes 10.
The bottom of the partition plate 7 is connected with a positioning nail 11, a plurality of positioning holes 12 are formed in the bottom of the annular air distribution chamber 6, the positioning holes 12 are distributed in an annular array at the center of the annular air distribution chamber 6, and the positioning nail 11 is detachably arranged in the positioning holes 12. The baffle 7 is provided with a mounting hole for mounting the locating nail 11, the locating nail 11 and the locating hole 12 are both tapped with threads, the locating nail 11 is screwed in the locating hole 12 when in use, the baffle 7 is mounted on the vertical plane of the central connecting line of the two adjacent rotational flow air nozzles 9, and when in mounting, the locating nail 11 is screwed in the locating hole 12 of the annular air distribution chamber 6 firstly, and then the baffle 7 is mounted on the locating nail 11 through the mounting hole, so that the fixing of the baffle 7 is realized.
The swirl air jet ports 9 are provided with a plurality of swirl air jet ports 9 which are distributed at the bottom of the annular combustion chamber 4 in an annular array. Sixteen swirl jets 9 are provided in this embodiment, the swirl jets 9 jetting gas from the annular gas distribution chamber 6 to the annular combustion chamber.
In some embodiments, as shown in fig. 6, the partition 7 is an aluminum flat plate (hereinafter abbreviated as BF plate) provided in plurality, and the plurality of aluminum flat plates are installed in the annular gas distribution chamber 6 at intervals. Wherein the length and the height of the aluminum partition plate 7 are consistent with the radial and height dimensions of the annular gas distribution chamber, and the width of the aluminum partition plate 7 is moderate.
In some embodiments, as shown in FIG. 7, the partition 7 is a box structure (hereinafter referred to as HR plates) And the center of the box body is provided with an opening, a plurality of baffle plates 7 are arranged, and the baffle plates 7 are installed in the annular air distribution chamber 6 at intervals. On the basis of the conventional planar partition 7, a cubic cavity of volume V and a diameter d are provided 1 An opening of length L. The parameter design corresponds to a potential circumferential mode frequency (500-600 Hz). The resonant frequency can be approximated by the speed of sound, the cross-sectional area of the aperture, the cavity volume, and the length of the aperture, where the calculation formula is:
c is the sound velocity, A is the cross-sectional area of the hole, V is the cavity volume, and L is the length of the opening.
In some embodiments, as shown in fig. 8, the partition 7 is a double-layer porous liner plate (hereinafter referred to as DP plate), and the double-layer porous liner plate is provided in plurality, and the plurality of double-layer porous liner plates are installed in the annular gas distribution chamber 6 at intervals. Two of the plates (width w 2 ) Attached at the bottom to facilitate fixation and installation, each plate (diameter d 2 Porosity σ). DP separator 7 should have a perforated liner of relatively large porosity to distinguish it from conventional separator 7 (σ≡0.08 is taken in the test).
In this embodiment, taking 1-4 partition plates 7 as an example, consider a circumferential distribution pattern of the partition plates 7 at the eighth bisector, and the specific installation mode of the partition plates 7 is shown in fig. 9.
The test results for the thermoacoustic oscillation amplitude according to the circumferential arrangement of the three separators 7 are shown in fig. 10, where 0B represents the case where no separator 7 is installed, and the thermoacoustic oscillation amplitude is at a higher value. And after an HR plate is added, the amplitude of thermoacoustic oscillation is obviously reduced. This is reasonable because the HR itself acts as a mass-spring-damping system, while acting as a solid wall boundary baffle 7, having its own damping effect on the transversely propagating acoustic waves in circumferential mode. The effect on the thermoacoustic oscillation amplitude is also evident for DP and BF, in different numbers and mounting positions. The influence of the circumferential installation position can be seen in the working condition of adding two BF baffles 7, wherein the stronger damping effect is shown when the angle difference between the two baffles is smaller (2B-3 and 2B-4). The addition of three types of baffle 7-type damping devices, which all cause a disruption of the rotational symmetry of the annular combustion chamber 4, also effectively attenuate the circumferential thermo-acoustic oscillations, and it can be seen from fig. 10: the BF plates arranged in the mode 3B-3 in FIG. 9 can damage the rotational symmetry of the annular combustion chamber 4 to the greatest extent, reduce the amplitude of the thermoacoustic oscillation of the annular combustion chamber 4 to the greatest extent, and have the best effect of weakening the circumferential thermoacoustic oscillation of the annular combustion chamber.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An annular combustor thermoacoustic oscillating diaphragm type passive control device, comprising:
the upper connecting flange is provided with a combustion chamber inner wall and a combustion chamber outer wall above; the space between the inner wall of the combustion chamber and the outer wall of the combustion chamber forms an annular combustion chamber;
the lower connecting flange is connected below the upper connecting flange, the lower connecting flange is provided with an annular air distribution chamber, a partition plate is detachably arranged in the annular air distribution chamber, an air inlet pipe is arranged on the side wall of the annular air distribution chamber, and the annular air distribution chamber is communicated with the annular combustion chamber through a rotational flow air jet;
the bottom of the partition plate is connected with positioning nails, a plurality of positioning holes are formed in the bottom of the annular air distribution chamber, the positioning holes are distributed in an annular array at the central position of the annular air distribution chamber, and the positioning nails are detachably arranged in the positioning holes.
2. The thermoacoustic oscillating diaphragm type passive control device for an annular combustion chamber according to claim 1, wherein the outer wall of the annular gas distribution chamber is wound with a cooling pipe.
3. The thermoacoustic oscillation baffle type passive control device for the annular combustion chamber according to claim 1, wherein a plurality of swirl air nozzles are arranged, and the swirl air nozzles are distributed at the bottom of the annular combustion chamber in an annular array.
4. The passive control device of the thermoacoustic oscillation baffle type of the annular combustion chamber according to claim 1, wherein the baffle is an aluminum flat plate, a plurality of the aluminum flat plates are arranged, and a plurality of the aluminum flat plates are installed in the annular gas distribution chamber at intervals.
5. The device of claim 1, wherein the partition is a box structure, a through hole is formed in the center of the box, one partition is arranged, and the partition is installed in the annular air distribution chamber.
6. The passive control device of annular combustor thermoacoustic oscillation baffle type according to claim 1, wherein the baffle is a double-layer porous lining plate, a plurality of double-layer porous lining plates are arranged, and a plurality of double-layer porous lining plates are installed in the annular gas distribution chamber at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210980337.8A CN115325570B (en) | 2022-08-16 | 2022-08-16 | Thermoacoustic oscillation diaphragm type passive control device for annular combustion chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210980337.8A CN115325570B (en) | 2022-08-16 | 2022-08-16 | Thermoacoustic oscillation diaphragm type passive control device for annular combustion chamber |
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| CN115325570A CN115325570A (en) | 2022-11-11 |
| CN115325570B true CN115325570B (en) | 2023-12-29 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022753A (en) * | 2010-12-31 | 2011-04-20 | 北京航空航天大学 | Low-pollution combustion chamber with premixed and pre-evaporated precombustion part |
| CN105841193A (en) * | 2016-05-18 | 2016-08-10 | 葛明龙 | Two aerospace turbofan engines |
| CN107327872A (en) * | 2017-08-04 | 2017-11-07 | 浙江大学 | A kind of oblique spray ring stream toroidal combustion chamber |
| CN113551264A (en) * | 2021-07-29 | 2021-10-26 | 厦门大学 | Interstage rotary detonation combustion chamber for ground combustion engine combined cycle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10584876B2 (en) * | 2016-03-25 | 2020-03-10 | General Electric Company | Micro-channel cooling of integrated combustor nozzle of a segmented annular combustion system |
| US11079111B2 (en) * | 2019-04-29 | 2021-08-03 | Solar Turbines Incorporated | Air tube |
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2022
- 2022-08-16 CN CN202210980337.8A patent/CN115325570B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022753A (en) * | 2010-12-31 | 2011-04-20 | 北京航空航天大学 | Low-pollution combustion chamber with premixed and pre-evaporated precombustion part |
| CN105841193A (en) * | 2016-05-18 | 2016-08-10 | 葛明龙 | Two aerospace turbofan engines |
| CN107327872A (en) * | 2017-08-04 | 2017-11-07 | 浙江大学 | A kind of oblique spray ring stream toroidal combustion chamber |
| CN113551264A (en) * | 2021-07-29 | 2021-10-26 | 厦门大学 | Interstage rotary detonation combustion chamber for ground combustion engine combined cycle |
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| Publication number | Publication date |
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| CN115325570A (en) | 2022-11-11 |
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