CN115325570A - Annular combustion chamber thermo-acoustic oscillation partition plate type passive control device - Google Patents
Annular combustion chamber thermo-acoustic oscillation partition plate type passive control device Download PDFInfo
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- CN115325570A CN115325570A CN202210980337.8A CN202210980337A CN115325570A CN 115325570 A CN115325570 A CN 115325570A CN 202210980337 A CN202210980337 A CN 202210980337A CN 115325570 A CN115325570 A CN 115325570A
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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 72
- 230000010355 oscillation Effects 0.000 title claims abstract description 38
- 238000005192 partition Methods 0.000 title claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 238000011160 research Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000000034 method Methods 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
- 239000000446 fuel Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000004411 aluminium Substances 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
- 238000005259 measurement Methods 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
- 238000004804 winding Methods 0.000 description 1
Images
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
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- 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 ring combustion chamber thermo-acoustic oscillation clapboard type passive control device, which relates to the technical field of aero-engine and gas turbine research, and comprises the following components: the upper connecting flange is arranged above the combustion chamber inner wall and the combustion chamber outer wall; 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 gas distribution chamber, a partition plate can be detachably mounted inside the annular gas distribution chamber, the side wall of the annular gas distribution chamber is provided with a gas inlet pipe, and the annular gas distribution chamber is communicated with the annular combustion chamber through a swirl gas nozzle. The invention can effectively improve the instability problem of circumferential thermoacoustic in the annular combustion chamber under the action of centrifugal force by arranging the partition plates in the annular gas distribution chamber, and the passive control of circumferential thermoacoustic oscillation can be realized by increasing or reducing the number and relative positions of the partition plates because the partition plates are detachably connected in the annular gas distribution chamber.
Description
Technical Field
The invention relates to the technical field of research of aero-engines and gas turbines, in particular to a thermal-acoustic oscillation partition plate type passive control device for an annular combustion chamber.
Background
Thermoacoustic oscillations are a phenomenon that often occurs during combustion processes of gas turbine engines, ramjets, utility boilers, and the like, and they can cause many adverse effects, which can lead to high-amplitude oscillations of additional pressure, flow fields, and flames, increase thermal loads, aggravate the generation of pollutants, and affect the normal operation of combustors 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 thus, the system components are easily seriously damaged and destroyed.
At present, thermoacoustic oscillation control technologies are mainly divided into passive control and active control. Passive control includes installation of resonators, staging of fuel supply, optimizing fuel and air mixing, optimizing nozzle and combustor geometry, and the like. The active control is used for suppressing noise through a control system consisting of a sensor, a controller and an actuator. The existing method for passively controlling thermoacoustic oscillation has large limitation on the control degree, is often effective only under the operation condition within a certain range, and has poor effect.
Therefore, the problem to be solved by those skilled in the art is how to provide a passive control device for controlling the thermo-acoustic oscillation of the annular combustion chamber passively so as to achieve better control effect.
Disclosure of Invention
In view of this, the present invention provides a partition type passive control device for thermoacoustic oscillation in an annular combustion chamber, which aims to solve the above problems in the background art, and achieve passive control of thermoacoustic oscillation in the annular combustion chamber and achieve better control effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a passive control device of the annular combustion chamber thermo-acoustic oscillation diaphragm type, comprising:
the upper connecting flange is arranged above the combustion chamber inner wall and the combustion chamber outer wall; 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 gas distribution chamber, a partition plate can be detachably arranged in the annular gas distribution chamber, the side wall of the annular gas distribution chamber is provided with an air inlet pipe, and the annular gas distribution chamber is communicated with the annular combustion chamber through a swirl air injection port.
Furthermore, a cooling pipe is wound on the outer wall of the annular distribution chamber.
Furthermore, 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 and are distributed in an annular array at the central position of the annular air distribution chamber, and the positioning nails are detachably mounted in the positioning holes.
Furthermore, the swirl air injection ports are provided with a plurality of swirl air injection ports which are distributed at the bottom of the annular combustion chamber in an annular array.
Further, the partition plate is an aluminum flat plate, the aluminum flat plate is provided with a plurality of aluminum flat plates, and the aluminum flat plates are arranged in the annular gas distribution chamber at intervals.
Furthermore, 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 ofly, and is a plurality of the baffle is installed at the annular distribution indoor at interval.
Furthermore, the baffle is double-deck porous welt, double-deck porous welt is provided with a plurality ofly, and is a plurality of double-deck porous welt is installed at the annular distribution indoor at interval.
According to the technical scheme, compared with the prior art, the partition plate type passive control device for the thermo-acoustic oscillation of the annular combustion chamber is provided, the partition plate is arranged in the annular gas distribution chamber, the problem of instability of circumferential thermo-acoustic in the annular combustion chamber can be effectively solved under the action of centrifugal force, and the partition plate is detachably connected in the annular gas distribution chamber, so that the number and the installation position of the partition plate can be increased or reduced, and the passive control of the circumferential thermo-acoustic oscillation can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a partial cross-sectional view of an annular combustion chamber thermo-acoustic oscillation barrier type passive control device provided by the present invention;
FIG. 2 is a schematic view of an annular gas distribution chamber and a swirl jet orifice of the annular combustion chamber thermo-acoustic oscillation partition type passive control device provided by the invention;
FIG. 3 is a schematic view of the diaphragm mounting of the ring combustor thermo-acoustic oscillation diaphragm type passive control device provided by the present invention;
FIG. 4 is a top view of a diaphragm-mounted annular distribution chamber of the annular combustion chamber thermo-acoustic oscillation diaphragm type passive control device provided by the present invention;
FIG. 5 is a top view of an annular combustion chamber of the passive control device of the annular combustion chamber thermoacoustic oscillation baffle type provided by the present invention;
FIG. 6 is a schematic view of a diaphragm (BF) of an annular combustion chamber thermo-acoustic oscillation diaphragm type passive control device provided by the present invention;
FIG. 7 is a schematic view of an annular combustion chamber thermo-acoustic oscillation diaphragm type passive control device diaphragm (HR) provided in accordance with the present invention;
FIG. 8 is a schematic view of an annular combustion chamber thermo-acoustic oscillation baffle type passive control device baffle (DP) provided in accordance with the present invention;
FIG. 9 is a schematic view of a specific installation of a partition of an annular combustion chamber thermo-acoustic oscillation partition type passive control device provided by the present invention;
FIG. 10 is a schematic diagram of the test results of the thermo-acoustic oscillation amplitude obtained by the thermo-acoustic oscillation barrier type passive control device for the annular combustion chamber according to the circumferential arrangement of three barriers.
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 gas distribution chamber; 7 is a clapboard; 8 is an air inlet pipe; 9 is a rotational flow air jet; 10 is a cooling pipe; 11 is a positioning nail; and 12, a positioning hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 10, an embodiment of the present invention discloses a passive control device of a ring-shaped combustion chamber thermo-acoustic oscillation partition plate type, comprising:
the combustion chamber comprises an upper connecting flange 1, wherein a combustion chamber inner wall 2 and a combustion chamber outer wall 3 are arranged above the upper connecting flange 1; the space between the inner wall 2 of the combustion chamber and the outer wall 3 of the combustion chamber forms an annular combustion chamber 4; wherein the height of the outer wall 3 of the combustion chamber is higher than that 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 both quartz tubes, in the embodiment, the inner wall 2 of the combustion chamber is a quartz tube with the height of 400mm, and the outer wall 3 of the combustion chamber is a quartz tube with the height of 112 mm.
The outer wall of the annular gas distribution chamber 6 is wound with a cooling pipe 10. And a groove for installing the cooling pipe 10 is arranged on the outer wall of the annular air distribution chamber 6 in a winding mode along the circumferential direction of the annular air distribution chamber 6, the groove is semicircular, and the diameter of the groove is the same as that of the cooling pipe 10.
The bottom of the partition plate 7 is connected with positioning nails 11, the bottom of the annular air distribution chamber 6 is provided with a plurality of positioning holes 12, the plurality of positioning holes 12 are distributed in an annular array mode according to the central position of the annular air distribution chamber 6, and the positioning nails 11 are detachably mounted in the positioning holes 12. The partition plate 7 is provided with a mounting hole for mounting the positioning nail 11, the positioning nail 11 and the positioning hole 12 are both provided with threads, the positioning nail 11 is screwed in the positioning hole 12 during use, the partition plate 7 is mounted on a vertical plane of a central connecting line of two adjacent swirl air injection ports 9, during mounting, the positioning nail 11 is firstly screwed in the positioning hole 12 of the annular air distribution chamber 6, and then the partition plate 7 penetrates through the mounting hole and is mounted on the positioning nail 11, so that the partition plate 7 is fixed.
The plurality of swirl air nozzles 9 are arranged, and the plurality of swirl air nozzles 9 are distributed at the bottom of the annular combustion chamber 4 in an annular array. In the present embodiment, sixteen swirl gas nozzles 9 are provided, and the swirl gas nozzles 9 inject gas from the annular gas distribution chamber 6 to the annular combustion chamber.
In some embodiments, as shown in fig. 6, the partition plate 7 is an aluminum flat plate (hereinafter, referred to as BF plate) provided with a plurality of aluminum flat plates which are installed at intervals in the annular gas distribution chamber 6. Conventional planar baffles 7 of moderate width, in which the aluminium baffle 7 has a length and height which are both in accordance with the radial and height dimensions of the annular distribution chamber.
In some embodiments, as shown in fig. 7, the partition 7 is a box structure (hereinafter referred to as HR plate), and the box has an opening at a central position, and a plurality of partitions 7 are provided, and the plurality of partitions 7 are installed in the annular air distribution chamber 6 at intervals. On the basis of a conventional planar partition 7, a cubic cavity with a volume V and a diameter d 1 And an opening of length L. The parametric design corresponds to potential circumferential mode frequencies (500-600 Hz). The resonant frequency can be approximated by the speed of sound, the cross-sectional area of the hole, the cavity volume, and the length of the hole, where the formula is:
c is the speed of sound, A is the cross-sectional area of the hole, V is the volume of the cavity, 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 (hereinafter referred to as DP plate) provided in plurality, and the double-layer porous liner is installed in the annular air distribution chamber 6 at intervals. Two of which are equal in width (w in width) 2 ) Attached at the bottom to facilitate fixing and mounting, each plate (diameter d) 2 Porosity σ). DP baffle 7 should have relatively large poresPerforated liner of porosity to distinguish it from the conventional separator 7 (σ ≈ 0.08 in the test).
In the embodiment, taking the installation of 1-4 partition boards 7 as an example, considering the circumferential distribution pattern of the partition boards 7 in the bisector, the specific installation manner of the partition boards 7 is shown in fig. 9.
The results of the measurement of the thermoacoustic oscillation amplitude obtained from the circumferential arrangement of the three kinds of diaphragms 7 are shown in fig. 10, where 0B in the figure represents the case where no diaphragm 7 is installed, and the thermoacoustic oscillation amplitude is at a higher value. After an HR plate is additionally arranged, the amplitude of the 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 laterally propagating sound waves in the circumferential mode. The influence of DP and BF on the amplitude of the thermoacoustic oscillations is also evident in the case of different numbers and installation positions. The influence of the circumferential installation position can be seen in the working condition of additionally installing two BF separating plates 7, wherein the damping effect is stronger when the angle difference between the two plates is smaller (2B-3 and 2B-4). The addition of three types of baffle 7 damping devices, all of which disrupt the rotational symmetry of the annular combustion chamber 4, also effectively attenuates circumferential thermoacoustic oscillations, and can be seen from fig. 10: the BF plate arranged in the manner of 3B-3 in FIG. 9 can destroy the rotational symmetry of the annular combustion chamber 4 to the maximum extent, reduce the amplitude of the thermoacoustic oscillation of the annular combustion chamber 4 to the maximum extent, and simultaneously weaken the circumferential thermoacoustic oscillation of the annular combustion chamber to the best extent.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
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 (7)
1. A passive control device of the annular combustion chamber thermo-acoustic oscillation partition plate type, comprising:
the upper connecting flange is arranged above the combustion chamber inner wall and the combustion chamber outer wall; 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 mounted inside 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 swirl jet orifice.
2. The apparatus as claimed in claim 1, wherein the cooling pipe is wound around the outer wall of the annular distribution chamber.
3. The apparatus as claimed in claim 1, wherein the bottom of the partition is connected with a plurality of positioning pins, the bottom of the annular distribution chamber is provided with a plurality of positioning holes, the plurality of positioning holes are arranged in an annular array at the center of the annular distribution chamber, and the positioning pins are detachably mounted in the positioning holes.
4. The passive control device of the annular combustion chamber thermo-acoustic oscillation baffle plate type as claimed in claim 1, wherein a plurality of swirl jet ports are provided, and the plurality of swirl jet ports are distributed at the bottom of the annular combustion chamber in an annular array.
5. The apparatus as claimed in claim 1, wherein the partition is a plurality of flat aluminum plates, and the plurality of flat aluminum plates are spaced apart and mounted in the annular gas distribution chamber.
6. The passive control device of a diaphragm type of ring combustion chamber thermo-acoustic oscillation as claimed in claim 1, wherein the diaphragm is a box structure having a through hole at a central position, the diaphragm is provided in plurality, and the plurality of diaphragms are installed at intervals in the ring air distribution chamber.
7. The apparatus as claimed in claim 1, wherein the partition is a double-layer porous lining plate, and the double-layer porous lining plate is provided in plurality, and the double-layer porous lining plates are installed in the annular 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN115325570A true CN115325570A (en) | 2022-11-11 |
| CN115325570B CN115325570B (en) | 2023-12-29 |
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| CN202210980337.8A Active CN115325570B (en) | 2022-08-16 | 2022-08-16 | Thermoacoustic oscillation diaphragm type passive control device for annular combustion chamber |
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Citations (6)
| 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 |
| US20170276358A1 (en) * | 2016-03-25 | 2017-09-28 | General Electric Company | Micro-Channel Cooling of Integrated Combustor Nozzle of a Segmented Annular Combustion System |
| CN107327872A (en) * | 2017-08-04 | 2017-11-07 | 浙江大学 | A kind of oblique spray ring stream toroidal combustion chamber |
| US20200340673A1 (en) * | 2019-04-29 | 2020-10-29 | Solar Turbines Incorporated | Air tube |
| CN113551264A (en) * | 2021-07-29 | 2021-10-26 | 厦门大学 | Interstage rotary detonation combustion chamber for ground combustion engine combined cycle |
-
2022
- 2022-08-16 CN CN202210980337.8A patent/CN115325570B/en active Active
Patent Citations (6)
| 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 |
| US20170276358A1 (en) * | 2016-03-25 | 2017-09-28 | General Electric Company | Micro-Channel Cooling of Integrated Combustor Nozzle of a Segmented Annular Combustion System |
| 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 |
| US20200340673A1 (en) * | 2019-04-29 | 2020-10-29 | Solar Turbines Incorporated | Air tube |
| 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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| CN115325570B (en) | 2023-12-29 |
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