CN113757720B - Combustion oscillation control device and method and combustion chamber - Google Patents
Combustion oscillation control device and method and combustion chamber Download PDFInfo
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- CN113757720B CN113757720B CN202111111795.XA CN202111111795A CN113757720B CN 113757720 B CN113757720 B CN 113757720B CN 202111111795 A CN202111111795 A CN 202111111795A CN 113757720 B CN113757720 B CN 113757720B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/26—Details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention provides a combustion oscillation control device, a method and a combustion chamber, wherein the device comprises a control casing, an adjustable channel mechanism and an adjustable acoustic resonator are arranged in the control casing, and an adjustable orifice plate is arranged between the adjustable channel mechanism and an outlet in the control casing; the adjustable channel mechanism comprises a blocking part and a channel part, the blocking part is adjustable along the radial blocking section of the control casing, the channel part is adjustable along the axial channel length of the control casing, and the adjustable pore plate is adjustable along the axial position of the control casing. The device is installed at the outlet of the combustion chamber, the amplitude and the frequency of combustion oscillation of the combustion chamber are adjusted by comprehensively adjusting and controlling the sectional area of the outlet of the combustion chamber, the outlet length, the resonator strength and various parameters of the acoustic boundary of the outlet of the combustion chamber, the expected control on the amplitude and the frequency of the combustion oscillation of the combustion chamber is realized, the adjustment and control of different amplitudes can be carried out aiming at the combustion oscillation under different frequencies, and the corresponding experimental research is favorably carried out.
Description
Technical Field
The invention relates to the technical field of energy power, in particular to a combustion oscillation control device, a combustion oscillation control method and a combustion chamber.
Background
The combustion of fossil fuel is still one of the main ways of obtaining energy and power at present, and the gas turbine is one of the important equipments in the field of energy and power at present, and is widely applied to industries such as aviation, navigation and power generation. Wherein the gas turbine combustor is the core component and power source of the entire gas turbine. However, with the increasingly strict requirements on pollutant emission, in order to reduce pollutant emission mainly based on nitrogen oxides (NOx), the advanced low-emission combustor mostly adopts lean premixed combustion technology, and the combustor is often operated in a working state close to flameout, so that the combustor is very sensitive to external disturbance and is easily disturbed by the outside to generate heat release rate pulsation. When the heat release rate pulsations in the combustion chamber couple with the acoustics of the combustion system (which can be simply understood as satisfying rayleigh's criterion), large magnitude heat release rate pulsations and pressure pulsations are easily caused, and the large magnitude pressure pulsations and heat release pulsations in the combustion chamber may cause structural damage to the combustion chamber, which may further affect the stable operation and safe operation of the combustion chamber and even the entire power or energy equipment system. Therefore, combustion oscillations are a must be avoided by modern power and energy equipment.
When combustion oscillations occur in the combustion chamber, the amplitude of the oscillations and the intensity of the heat-release pulsations in the combustion chamber cannot be controlled, and are determined entirely by the acoustic properties in the combustion chamber and the associated physical quantities of the flame. Therefore, when developing the combustion chamber, it is desirable to reproduce the combustion oscillation characteristics of the complete machine on a laboratory bench or test the comprehensive oscillation characteristics of the combustion chamber under wide acoustic conditions, so that the combustion oscillation characteristics of the combustion chamber can be tested and optimized independently before the complete machine test is carried out, and the risk of the complete machine development stage is reduced. In the stage of research and development of the combustion chamber, the combustion oscillation experiment is carried out aiming at the real combustion chamber, because the upstream and downstream structures of the combustion chamber are influenced by the design of the experiment table, the upstream and downstream structures are generally difficult to change, the fixed upstream and downstream structures lead to single acoustic characteristic, the combustion oscillation characteristic (such as frequency or amplitude which can not correspond to the whole machine) which can appear when the whole machine can not be reproduced can not be ensured, or only individual combustion oscillation characteristic can appear, but regulation capability is not provided, the combustion oscillation characteristic of the combustion chamber can not be tested under various acoustic conditions, and the experiment and development efficiency is greatly reduced.
Disclosure of Invention
The invention provides a combustion oscillation control device, a combustion oscillation control method and a combustion chamber, which are used for solving the defect that combustion oscillation is difficult to effectively control due to the fixed structure of the combustion chamber in the prior art and achieving the purpose of effectively regulating and controlling the combustion oscillation mode and the combustion oscillation intensity in the combustion chamber.
The invention provides a combustion oscillation control device, which comprises a control casing, wherein one end of the control casing is provided with an inlet, an adjustable channel mechanism is arranged in the inlet, the other end of the control casing is provided with an outlet, an adjustable acoustic resonator is arranged in the control casing, and an adjustable orifice plate is arranged in the control casing at a position between the adjustable channel mechanism and the outlet;
the adjustable channel mechanism comprises a blocking part and a channel part, the blocking part is adjustable along the radial blocking section of the control casing, the channel part is adjustable along the axial channel length of the control casing, and the position of the adjustable pore plate along the axial direction of the control casing is adjustable.
According to the combustion oscillation control device provided by the invention, the blocking part comprises a first expansion plate, the channel part comprises a second expansion plate, the first expansion plate is arranged perpendicular to the control casing, the second expansion plate is arranged perpendicular to the first expansion plate, the length of the first expansion plate along the radial direction of the control casing can be telescopically adjusted, and the length of the second expansion plate along the axial direction of the control casing can be telescopically adjusted.
According to the combustion oscillation control device provided by the present invention, the blocking portion includes a first blocking plate, the passage portion includes a second blocking plate, the first blocking plate is disposed perpendicularly to the control casing, and the second blocking plate is rotatably connected to the first blocking plate.
According to the combustion oscillation control device provided by the invention, the adjustable acoustic resonator comprises a resonator neck, a resonator cavity and a resonator cover plate, the resonator cover plate is arranged in the resonator cavity and is in threaded connection with the resonator cavity, and the resonator cover plate moves in the resonator cavity through threads to adjust the volume of the adjustable acoustic resonator.
According to the combustion oscillation control device provided by the invention, two adjustable acoustic resonators are arranged, and the two adjustable acoustic resonators are symmetrically arranged on the inner wall of the control casing.
According to the combustion oscillation control device provided by the invention, the adjustable pore plate comprises a porous plate and a movable adjusting mechanism, the porous plate is connected with the inner wall of the control casing through the movable adjusting mechanism, and the porous plate is vertically arranged along the axial direction of the control casing and movably arranged along the axial direction of the control casing through the movable adjusting mechanism.
According to the combustion oscillation control device provided by the invention, the movement adjusting mechanism comprises a slide rail which is arranged along the axial direction of the control casing.
The invention also provides a combustion oscillation control method, which comprises the following steps:
setting a blocking channel at a combustion outlet section, and acquiring a first parameter value and a second parameter value, wherein the first parameter value is the blocking cross-sectional area of the blocking channel, and the second parameter value is the length of the blocking channel;
a resonator is arranged at the combustion outlet section and is positioned at the rear section of the blocking channel, and a third parameter value is obtained and is the strength of the resonator;
arranging a porous plate at the combustion outlet section and at the rear section of the blocking channel to obtain a fourth parameter value, wherein the fourth parameter value is the length from the porous plate to the blocking channel;
controlling a frequency and an amplitude of a combustion oscillation by adjusting the first parameter value, the second parameter value, the third parameter value, and the fourth parameter value.
The invention provides a combustion chamber which comprises an air inlet section, a combustion section and an exhaust section, wherein the combustion oscillation control device is arranged between the combustion section and the exhaust section.
According to the combustion chamber provided by the invention, the combustion section comprises a flame tube, an outlet of the flame tube is connected with the adjustable channel mechanism, and a critical orifice plate is arranged at the joint of the control casing and the exhaust section.
According to the combustion oscillation control device, the combustion oscillation control method and the combustion chamber, the adjustable channel mechanism is arranged in the inlet of the control casing, the blocking section of the adjustable channel mechanism along the radial direction of the control casing and the channel length of the adjustable channel mechanism along the axial direction of the control casing can be adjusted, so that the diameter and the outlet length of the combustion outlet section can be changed to adjust the combustion oscillation mode and the oscillation intensity; the combustion oscillation intensity under different combustion oscillation modes is weakened by arranging an adjustable acoustic resonator in the control casing; the adjustable pore plate is arranged at the position between the adjustable channel mechanism and the outlet of the control casing in the control casing, the position of the adjustable pore plate along the axial direction of the control casing is adjustable, and the combustion oscillation frequency and the oscillation amplitude are changed by changing the relative position of the acoustic boundary of the combustion outlet section. The device is installed at the outlet of the combustion chamber, the amplitude and the frequency of combustion oscillation of the combustion chamber are adjusted by comprehensively adjusting and controlling the sectional area of the outlet of the combustion chamber, the outlet length, the resonator strength and various parameters of the acoustic boundary of the outlet of the combustion chamber, the expected control on the amplitude and the frequency of the combustion oscillation of the combustion chamber is realized, the adjustment and control of different amplitudes can be carried out aiming at the combustion oscillation under different frequencies, and the corresponding experimental research is favorably carried out.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of a prior art combustor configuration;
FIG. 2 is a schematic view of a combustion oscillation control apparatus provided by the present invention;
FIG. 3 is a schematic view of a combustion chamber configuration provided by the present invention;
FIG. 4 is a first schematic illustration of an adjustable channel mechanism of the combustion oscillation control apparatus provided in accordance with the present invention;
FIG. 5 is a second schematic illustration of an adjustable channel mechanism of the combustion oscillation control apparatus provided in accordance with the present invention;
FIG. 6 is a third schematic illustration of an adjustable channel mechanism of the combustion oscillation control apparatus provided in accordance with the present invention;
FIG. 7 is a schematic diagram of a tunable acoustic resonator configuration of a combustion oscillation control apparatus provided in accordance with the present invention;
FIG. 8 is a schematic diagram of an adjustable orifice plate configuration for a combustion oscillation control apparatus provided in accordance with the present invention;
FIG. 9 is a graph comparing the amplitude and frequency of combustion oscillations for different lengths of the channel portion provided by the present invention;
FIG. 10 is a graph comparing the amplitude and frequency of combustion oscillations at different area ratios of the plug outlet provided by the present invention;
reference numerals:
1: an air intake section; 2: a diffuser; 3: an oil pipe;
4: a nozzle; 5: a swirler; 6: a swirler outer ring;
7: a flame tube; 8: a combustion chamber casing; 9: an adjustable channel mechanism;
9-1: a blocking portion; 9-2: a channel portion; 10: an adjustable orifice plate;
10-1: a slide rail; 11: a control case; 11-1: an inlet;
11-2: an outlet; 12: critical orifice plates; 13: a tunable acoustic resonator;
13-1: a resonator neck; 13-2: a resonator cavity; 13-3: a resonator cover plate;
14: and an exhaust section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
An embodiment of the present invention provides a combustion oscillation control device, as shown in fig. 2, the device includes a control casing 11, one end of the control casing 11 is an inlet 11-1, the other end is an outlet 11-2, and an adjustable channel mechanism 9 is disposed in the inlet 11-1. The adjustable channel mechanism 9 comprises a blocking part 9-1 and a channel part 9-2, wherein the blocking part 9-1 plays a role of blocking in the control casing 11, and the blocking section of the blocking part 9-1 along the radial direction of the control casing 11 is adjustable. The channel part 9-2 is connected with the plug 9-1, and the section of the channel part 9-2 is the section part of the plug 9-1 which is not blocked in the control casing 11 and is a flow channel of the combustion airflow. The channel length of the channel portion 9-2 in the axial direction of the control case 11 is also adjustable.
An adjustable acoustic resonator 13 is arranged in the control casing 11, and an adjustable orifice plate 10 is arranged in the control casing 11 and positioned between the adjustable channel mechanism 9 and the outlet 11-2; the position of the adjustable orifice plate 10 along the axial direction of the control casing 11 is adjustable.
According to the embodiment of the invention, the combustion oscillation is regulated and controlled by comprehensively regulating the blocking section of the blocking part 9-1 along the radial direction of the control casing 11, the channel length of the channel part 9-2 along the axial direction of the control casing 11, the vibration intensity of the adjustable acoustic resonator 13 and the position of the adjustable orifice plate 10 along the axial direction of the control casing 11.
As shown in fig. 4, in the present embodiment, the adjustment of the blocking section of the blocking portion 9-1 in the radial direction of the control casing 11 is performed by a telescopic plate. Specifically, the blocking portion 9-1 is a first expansion plate, the first expansion plate is perpendicular to the inner wall of the control casing 11, the channel portion 9-2 is perpendicular to the first expansion plate, and the channel portion 9-2 is fixedly connected to the end portion, close to the center of the control casing 11, of the first expansion plate. The length of the first expansion plate along the radial direction of the control casing 11 can be adjusted in an expansion mode, so that the blocking area of the blocking part 9-1 is adjusted, and the size adjustment of the section of the channel part 9-2 is achieved. Wherein the variation range of the cross-sectional area D of the passage portion 9-2 is 0< -D/D <1 (D' and D are the adjustment areas of the blocking portion 9-1 in FIG. 4, and D is the cross-sectional area of the combustion chamber). As shown in fig. 10, the frequency and amplitude of the combustion oscillation are affected by the ratio of the cross-sectional area of the channel portion 9-2 to the area of the combustion chamber, and accordingly, the ratio rises, the frequency has a tendency to rise, and the amplitude is correspondingly smaller. Different experimental requirements can be met by continuously changing the blocking area of the blocking part 9-1, namely the section area of the channel part 9-2, and the section area of the channel part 9-2 with different diameters d can be designed according to requirements to adjust the channel area of the adjustable channel mechanism 9.
As shown in fig. 5, in the present embodiment, the adjustment of the passage length of the passage portion 9-2 in the axial direction of the control casing 11 is also performed by the expansion plate. Specifically, the channel part 9-2 is a second expansion plate, and the second expansion plate can be adjusted in an expansion manner along the axial direction of the control casing 11, so as to control the length of the channel part 9-2. As shown in FIG. 9, the change in the length of the passage portion 9-2 enables the mode and intensity of combustion oscillation to be changed in the combustion chamber, the intensity of combustion oscillation to be weakened by shortening the length of the passage portion 9-2, and the intensity of combustion oscillation to be enhanced by increasing the length of the passage portion 9-2. The channel parts 9-2 with different lengths are realized by designing a second expansion plate capable of continuously expanding and contracting, meanwhile, specific experimental research can be carried out aiming at outlet structures with certain specific lengths according to requirements, the channel parts 9-2 are adjusted in the experimental process to realize regulation and control of combustion oscillation in the combustion chamber, wherein the variation range of the length L of the channel parts 9-2 is 0 & ltL'/L & lt 1. In fig. 9 and 10, SR is the fuel distribution ratio, and it can be seen that the oscillation can be controlled by adjusting the sectional area of the channel portion 9-2 or the length of the channel portion 9-2 under different flame operating conditions.
Further, as shown in fig. 6, the blocking portion 9-1 may be a first blocking plate, the passage portion 9-2 may be a second blocking plate, the first blocking plate is disposed perpendicular to the control casing 11, and the second blocking plate is rotatably connected to a free end of the first blocking plate (D' and D in fig. 6 are adjustment areas of the blocking portion 9-1, and D is a sectional area of the combustion chamber). The adjustment of the section area of the blocking part 9-1 is realized by rotating the second blocking plate to adjust the position of the second blocking plate, and the length of the channel part 9-2 is also adjusted to a certain degree. The structure realizes the adjustment of combustion oscillation.
As shown in fig. 7, the tunable acoustic resonator 13 is preferably a helmholtz resonator, the tunable acoustic resonator 13 includes a resonator neck 13-1, a resonator cavity 13-2, and a resonator cover 13-3, the resonator cover 13-3 is disposed within the resonator cavity 13-2 and is threadably engaged with the resonator cavity 13-2, and the resonator cover 13-3 is threadably moved within the resonator cavity 13-2 to achieve volume tuning of the tunable acoustic resonator 13. Thereby changing the characteristic frequency of the resonator. The attenuation or elimination of combustion oscillations in the combustion chamber is achieved by helmholtz resonators at different characteristic frequencies.
It should be noted that in the present embodiment, two adjustable acoustic resonators 13 are provided, and the two adjustable acoustic resonators 13 are symmetrically arranged on the inner wall of the control casing 11, so as to ensure that the effect of the adjustable acoustic resonators 13 is stable and significant.
As shown in fig. 8, the adjustable orifice plate 10 includes an orifice plate and a movement adjusting mechanism, the orifice plate is connected to the inner wall of the control casing 11 through the movement adjusting mechanism, and the orifice plate is vertically arranged along the axial direction of the control casing 11 and is movably arranged along the axial direction of the control casing 11 through the movement adjusting mechanism. Specifically, the movement adjusting mechanism is a slide rail 10-1 arranged on the inner wall of the control case 11, and the slide rail 10-1 is arranged along the axial direction of the control case 11 to ensure that the porous plate moves along the axial direction of the control case 11. The porous plate is arranged behind the adjustable channel mechanism 9 as an acoustic boundary, and is connected with the inner wall of the control casing 11 through a slide rail 10-1 to realize position adjustment of the porous plate (10' and 10 in the figure 8 are both position adjustment of the acoustic boundary of the porous plate). By adjusting the relative position of the acoustic boundaries of the perforated plate, the length of the acoustic resonance chamber within the control housing 11 can be varied, thereby varying the frequency of the combustion oscillations and the amplitude of the combustion oscillations within the combustion chamber.
The combustion oscillation control device provided by the embodiment is arranged at the outlet of the combustion chamber, the amplitude and the frequency of combustion oscillation of the combustion chamber are adjusted by comprehensively adjusting and controlling the sectional area of the outlet of the combustion chamber, the length of the outlet, the strength of the resonator and various parameters of the acoustic boundary of the outlet of the combustion chamber, the expected control of the amplitude and the frequency of the combustion oscillation of the combustion chamber is realized, the adjustment and control of different amplitudes can be carried out aiming at the combustion oscillation under different frequencies, and the corresponding experimental research is favorably carried out.
The embodiment of the present invention further provides a combustion chamber, as shown in fig. 3, the combustion chamber includes an air intake section 1, a combustion section and an exhaust section 14, the combustion chamber is the same as the combustion chamber in fig. 1 in the prior art, a diffuser 2 is disposed between the air intake section 1 and the combustion section, the combustion section includes a combustion chamber casing 8, a flame tube 7 is disposed inside the combustion chamber casing 8, a nozzle 4, a swirler 5 and a swirler outer ring 6 are disposed at an end of the flame tube 7, and the nozzle 4 is connected to the oil pipe 3. In contrast, the combustion chamber provided in the embodiment of the present invention is provided with the combustion oscillation control device as described above between the combustion section and the exhaust section 14. Specifically, the outlet of the flame tube 7 is connected with an adjustable channel mechanism 9, and a critical orifice plate 12 is arranged at the joint of a control casing 11 and an exhaust section 14. The combustion chamber also has the advantages as described above due to the installation of the combustion oscillation control device.
The embodiment of the invention also provides a combustion oscillation control method, which comprises the following steps:
step 1: the method comprises the steps that a blocking channel is arranged at the outlet of a flame tube 7 of a combustion chamber, the blocking channel is provided with a blocking part 9-1 and a channel part 9-2, the blocking area of the blocking part 9-1 or the cross section area of the channel part 9-2 except for the blocking part is obtained and sequentially used as a first parameter value; the length of the channel part 9-2 is acquired as the second parameter value.
Step 2: and arranging a resonator at the combustion outlet section and at the rear section of the blocked channel, and acquiring the working strength or frequency of the resonator as a third parameter value.
And 3, step 3: set up the perforated plate in the combustion outlet section and be located to block up the passageway back end, the distance between perforated plate and the jam passageway can be adjusted, acquires the distance between perforated plate and the jam passageway and regards as the fourth parameter value.
And 4, step 4: the frequency and the amplitude of the combustion oscillation are controlled by comprehensively adjusting the first parameter value, the second parameter value, the third parameter value and the fourth parameter value, so that the frequency and the amplitude of the combustion oscillation of the combustion chamber reach target values, and corresponding experimental research is facilitated.
According to the combustion oscillation control method provided by the embodiment, the combustion oscillation intensity under different combustion oscillation modes is weakened by adding the adjustable Helmholtz resonator on the wall surface of the combustion chamber; changing the combustion oscillation mode and the oscillation intensity in the combustion chamber by changing the diameter and the length of an outlet of the combustion chamber; varying the combustion oscillation frequency and amplitude within the combustion chamber is accomplished by varying the relative position of the combustion chamber outlet acoustic boundary. The embodiment of the invention can adjust and control different amplitudes of combustion oscillation under different frequencies, and is beneficial to developing corresponding experimental research.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The combustion oscillation control device is characterized by comprising a control casing (11), wherein one end of the control casing (11) is provided with an inlet (11-1), the inlet (11-1) is used for being connected with the output end of a combustion section of a combustion chamber, an adjustable channel mechanism (9) is arranged in the inlet (11-1), the other end of the control casing (11) is provided with an outlet (11-2), an adjustable acoustic resonator (13) is arranged in the control casing (11), and an adjustable pore plate (10) is arranged in the control casing (11) at a position between the adjustable channel mechanism (9) and the outlet (11-2);
the adjustable channel mechanism (9) comprises a blocking part (9-1) and a channel part (9-2), the blocking section of the blocking part (9-1) along the radial direction of the control casing (11) is adjustable, the channel length of the channel part (9-2) along the axial direction of the control casing (11) is adjustable, and the position of the adjustable pore plate (10) along the axial direction of the control casing (11) is adjustable.
2. The combustion oscillation control device of claim 1, wherein the blocking portion (9-1) comprises a first expansion plate, wherein the passage portion (9-2) comprises a second expansion plate, wherein the first expansion plate is disposed perpendicular to the control casing (11), wherein the second expansion plate is disposed perpendicular to the first expansion plate, wherein the first expansion plate is telescopically adjustable in length along a radial direction of the control casing (11), and wherein the second expansion plate is telescopically adjustable in length along an axial direction of the control casing (11).
3. The combustion oscillation control device of claim 1, wherein the blocking portion (9-1) comprises a first blocking plate, and the passage portion (9-2) comprises a second blocking plate, the first blocking plate being arranged perpendicularly to the control casing (11), the second blocking plate being rotatably connected to the first blocking plate.
4. The combustion oscillation control device of claim 1, wherein the tunable acoustic resonator (13) comprises a resonator neck (13-1), a resonator cavity (13-2), and a resonator cover plate (13-3), the resonator cover plate (13-3) being disposed within the resonator cavity (13-2) and being in threaded connection with the resonator cavity (13-2), the resonator cover plate (13-3) being movable within the resonator cavity (13-2) by threading to achieve volume tuning of the tunable acoustic resonator (13).
5. The combustion oscillation control device of claim 1, wherein there are two of the adjustable acoustic resonators (13), and the two adjustable acoustic resonators (13) are symmetrically arranged on the inner wall of the control casing (11).
6. The combustion oscillation control device of claim 1, wherein the adjustable orifice plate (10) comprises an orifice plate and a movement adjusting mechanism, the orifice plate is connected with the inner wall of the control casing (11) through the movement adjusting mechanism, the orifice plate is vertically arranged along the axial direction of the control casing (11) and is movably arranged along the axial direction of the control casing (11) through the movement adjusting mechanism.
7. The combustion oscillation control device of claim 6 wherein the movement adjusting mechanism comprises a slide rail (10-1), the slide rail (10-1) being arranged along an axial direction of the control case (11).
8. A combustion oscillation control method characterized by comprising:
setting a blocking channel at a combustion outlet section, and acquiring a first parameter value and a second parameter value, wherein the first parameter value is the blocking cross-sectional area of the blocking channel, and the second parameter value is the length of the blocking channel;
a resonator is arranged at the combustion outlet section and is positioned at the rear section of the blocking channel, and a third parameter value is obtained and is the strength of the resonator;
arranging a porous plate at the combustion outlet section and at the rear section of the blocking channel to obtain a fourth parameter value, wherein the fourth parameter value is the length from the porous plate to the blocking channel;
controlling a frequency and an amplitude of combustion oscillations by adjusting the first, second, third, and fourth parameter values.
9. A combustion chamber, characterized by an intake section (1), a combustion section and an exhaust section (14), between which combustion section and exhaust section (14) there is a combustion oscillation control device according to any one of claims 1-7.
10. The combustor according to claim 9, characterized in that the combustion section comprises a flame tube (7), the outlet of the flame tube (7) is connected with the adjustable channel mechanism (9), and a critical orifice plate (12) is arranged at the connection of the control casing (11) and the exhaust section (14).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111111795.XA CN113757720B (en) | 2021-09-18 | 2021-09-18 | Combustion oscillation control device and method and combustion chamber |
| PCT/CN2021/134928 WO2023040061A1 (en) | 2021-09-18 | 2021-12-02 | Combustion oscillation control device and method, and combustion chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111111795.XA CN113757720B (en) | 2021-09-18 | 2021-09-18 | Combustion oscillation control device and method and combustion chamber |
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| CN113757720A CN113757720A (en) | 2021-12-07 |
| CN113757720B true CN113757720B (en) | 2023-01-31 |
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| CN107062307B (en) * | 2017-05-09 | 2023-06-20 | 新奥能源动力科技（上海）有限公司 | Combustion chamber of gas turbine |
| CN110763474B (en) * | 2018-07-25 | 2021-08-13 | 中国航发商用航空发动机有限责任公司 | Combustion chamber test device |
| CN109737450B (en) * | 2018-12-11 | 2019-12-03 | 北京航空航天大学 | Combustion chambers burn oscillation control device and combustion chambers burn oscillation control method |
| CN111425887B (en) * | 2019-01-10 | 2021-10-15 | 中国航发商用航空发动机有限责任公司 | Gas turbine combustion chamber and gas turbine |
| CN110107915B (en) * | 2019-04-23 | 2020-11-10 | 中国航空发动机研究院 | Main combustion chamber three-channel short sudden-expansion diffuser |
| CN110939511A (en) * | 2019-12-31 | 2020-03-31 | 新奥能源动力科技（上海）有限公司 | Miniature gas turbine |
| CN212390407U (en) * | 2019-12-31 | 2021-01-22 | 新奥能源动力科技（上海）有限公司 | Gas turbine combustion chamber and gas turbine |
| CN111043625B (en) * | 2019-12-31 | 2024-06-04 | 新奥能源动力科技（上海）有限公司 | Combustion chamber of miniature gas turbine and miniature gas turbine |
| CN112128800A (en) * | 2020-10-18 | 2020-12-25 | 西安交通大学 | Low-swirl direct-injection combustor for low emission of gas turbine |
| CN113049263B (en) * | 2021-05-17 | 2022-05-17 | 南京航空航天大学 | Combustion oscillation tester with continuously variable amplitude and frequency |
| CN113393827B (en) * | 2021-06-08 | 2022-05-10 | 北京航空航天大学 | Active/passive control Helmholtz resonator for changing sound absorption frequency |
-
2021
- 2021-09-18 CN CN202111111795.XA patent/CN113757720B/en active Active
- 2021-12-02 WO PCT/CN2021/134928 patent/WO2023040061A1/en unknown
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| Publication number | Publication date |
|---|---|
| CN113757720A (en) | 2021-12-07 |
| WO2023040061A1 (en) | 2023-03-23 |
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