JP2006138272A - Damping addition device, combustor and gas turbine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily damp vibration of wide frequency domains and secure durability. <P>SOLUTION: This damping addition device 20 having an opening portion 22 open to a combustion region 12 of a combustion chamber 11 and a plurality of resonance spaces 25 is mounted on the combustion chamber 11. Only one of the plurality of resonance spaces 25 is connected to the opening portion 22. On-off valves 50 are provided between the plurality of resonance spaces 25. When fuel is burnt in the combustion region 12, combustion vibration may occur, but the vibration enters from the opening portion 22 into the resonance spaces 25 where it is resonated and damped. The combustion vibration includes a plurality of frequency domains, but when the on-off valves 50 are opened/closed, the capacities of the resonance spaces 25 for resonating the vibration are changed to damp the vibration of the frequency domains corresponding to the capacities. As a result, the vibration of the wide frequency domains is easily damped and durability is secured. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a damping addition device, a combustor, and a gas turbine. In particular, the present invention relates to a damping addition device, a combustor, and a gas turbine that can suppress vibrations in a wide frequency range.

  The gas turbine has a compressor, a combustor, and a turbine. The compressor takes in air, compresses it to a high pressure, and sends the high-pressure air to the combustor. In the combustor, the fuel is blown out to the high pressure air to burn the fuel. High-temperature combustion gas generated by the combustion of fuel is sent to the turbine, and this high-temperature combustion gas drives the turbine. Since the rotating shaft of the turbine and the rotating shaft of the compressor rotate together, the turbine is driven in this manner, so that the compressor is also driven, and air is taken in and compressed as described above.

  The gas turbine that operates in this way may generate combustion vibration when the fuel burns as described above, and this combustion vibration causes noise and vibration during the operation of the gas turbine. In particular, in recent gas turbines, the NOx (nitrogen oxide) of exhaust gas is reduced in consideration of the influence on the environment during operation. However, in order to reduce NOx, lean combustion of fuel is required. Often used. However, lean combustion tends to cause instability of combustion, and combustion vibration is likely to occur. This combustion vibration has a wide frequency region or a plurality of frequency regions. To suppress this combustion vibration, it is necessary to attenuate the vibration by providing a resonance space. In the space, a frequency region of vibration that can be attenuated by the volume is determined. Therefore, in the conventional gas turbine, a damping addition device capable of changing the volume of the resonance space is provided in the combustor, and the volume of the resonance space is changed in accordance with the frequency region of the combustion vibration during the operation of the gas turbine. The combustion vibrations having a wide frequency range were damped.

  For example, in Patent Document 1, the combustor is equipped with a damping addition device having a resonance space, and the resonance space and the combustor are connected by a pipe having an opening / closing means in the middle. When the frequency region of the vibration to be damped is wide, a piston is provided in the resonance space, and the volume of the resonance space is changed by operating the piston to attenuate the vibration in a plurality of frequency regions. Alternatively, by providing a plurality of pipes for connecting the resonance space and the combustor, each pipe having a different diameter or length, and selecting a pipe for connecting the resonance space and the combustor by the opening / closing means. The vibration of multiple frequency regions was damped.

JP 2003-130350 A

  However, in the above-described attenuation addition device provided in the gas turbine, the resonance region is constant when the volume of the resonance space is not changed and the diameter and length of the pipe connecting the resonance space and the combustor are not changed. Therefore, it may be difficult to attenuate vibrations in a wide frequency range. In addition, when a piston is provided in the resonance space and the volume of the resonance space is changed by operating the piston, the resonance volume changes, so that vibration in a wide frequency range can be attenuated. When many are provided, a large number of pistons must be controlled, and the structure may be complicated. Also, a plurality of pipes having different diameters or lengths are provided between the resonance space and the combustor, thereby connecting the resonance space and the combustor, and connecting the resonance space and the combustor by the opening / closing means. In the case of selecting, it is necessary to provide a plurality of pipes in the combustor that should have a strong structure because various vibrations are generated, and there is a concern that durability may be reduced.

  The present invention has been made in view of the above, and an object of the present invention is to provide a damping addition device, a combustor, and a gas turbine that can easily attenuate vibrations in a wide frequency range and ensure durability. .

  In order to solve the above-described problems and achieve the object, a damping addition device according to the present invention includes one opening that is open to a vibration generating region that is a portion where vibration is generated, and the opening. Characterized in that it comprises a connected attenuating section, a plurality of resonance spaces of the attenuating section, and a plurality of opening / closing means that are located between the resonance spaces and that open and close the resonance spaces. To do.

  In the present invention, a plurality of resonance spaces are provided in the attenuating portion, and an opening / closing means is provided between the resonance spaces. Therefore, by opening / closing the opening / closing means, the plurality of resonance spaces are communicated or blocked, and the opening portion is opened. The volume of the entire resonance space in communication can be easily changed. In addition, although a plurality of resonance spaces are provided, the plurality of resonance spaces are connected via the opening / closing means. Therefore, the number of openings for the vibration generation region does not have to be the same as the number of resonance spaces, and there is one opening. It's okay. As a result, vibrations in a wide frequency range can be easily damped and durability can be ensured.

  In the attenuation adding device according to the present invention, the plurality of resonance spaces are characterized in that at least three resonance spaces are connected in series.

  In the present invention, a plurality of resonance spaces can be easily connected and provided by connecting the resonance spaces in series. As a result, vibrations in a wide frequency range can be attenuated more easily.

  In the attenuation adding device according to the present invention, the plurality of resonance spaces are characterized in that at least two resonance spaces are connected in parallel to one resonance space.

  In the present invention, by connecting the resonance spaces in parallel, the combination of the resonance means communicating when the opening / closing means is opened increases. Thereby, the volume of the resonance space can be changed more finely. For example, by connecting a plurality of resonance spaces of different sizes to one resonance space in parallel, one resonance space can communicate with any one of the resonance spaces. Therefore, the volume formed by the resonance space communicating is The combined volume of any resonance space can be formed. As a result, vibrations in a wide frequency range can be damped easily and more reliably.

  Further, the attenuation adding device according to the present invention is characterized in that a fluid resistance member is provided in the resonance space.

  In the present invention, by providing the fluid resistance member in the resonance space, the vibration can be attenuated not only by the resonance space but also by the fluid resistance member. Further, when adjusting the frequency region of the vibration to be attenuated, it is possible to adjust not only by changing the volume of the resonance space but also by changing the resistance value by the fluid resistance member. As a result, the attenuation performance can be improved.

  Further, the attenuation adding device according to the present invention is characterized in that a plurality of the fluid resistance members are provided, and the plurality of fluid resistance members are separated from each other.

  In the present invention, by providing a plurality of fluid resistance members and separating them from each other, vibrations in a plurality of frequency regions can be attenuated. As a result, the attenuation performance can be improved more reliably.

  Further, in the attenuation adding device according to the present invention, the attenuation part has a circular pipe part formed by a circular pipe, and the resonance space is formed by the circular pipe part. To do.

  In the present invention, a commercially available piping member can be used by forming the resonance space with a circular piping, that is, a circular piping portion. Thereby, the resonance space can be easily manufactured. As a result, the manufacturing cost can be reduced.

  In the attenuation adding device according to the present invention, the attenuation unit includes an outside air introduction unit that introduces a fluid outside the attenuation unit into the resonance space, and a flow rate of the fluid that is introduced from the outside air introduction unit into the resonance space. And a flow rate adjusting means for adjusting the flow rate.

  In the present invention, since the outside air introduction part and the flow rate adjusting means are provided, the fluid outside the attenuation part, for example, the air outside the attenuation part can be introduced into the resonance space by adjusting the flow rate adjustment means. it can. When this air is introduced into the resonance space, the resonance characteristic in the resonance space changes, so that the vibration damping characteristic can be adjusted. In particular, when the fluid resistance member is provided in the resonance space, the air is introduced into the resonance space. By introducing, the resistance value in the fluid resistance member can be changed, and the attenuation characteristic is greatly changed. For this reason, the attenuation characteristic can be adjusted by adjusting the amount of air flowing into the resonance space by the flow rate adjusting means. As a result, the damping performance can be improved more reliably.

  The attenuation adding device according to the present invention is connected to a pressure sensor for detecting vibration in the vibration generating region, the pressure sensor and the opening / closing means, and opens / closes the opening / closing means based on a signal from the pressure sensor. And a control unit.

  In this invention, since the pressure sensor can detect the vibration in the vibration generating region, the control unit can detect the frequency of the vibration based on the signal from the pressure sensor, and the control unit can detect the vibration according to the frequency. Open and close the opening and closing means. By opening / closing the opening / closing means, a plurality of resonance spaces are communicated or blocked, the volume of the entire resonance space is changed, and the vibration in the frequency domain corresponding to the volume of the resonance space is resonated in the resonance space and attenuated. As a result, the opening / closing means can be opened and closed in accordance with the frequency of the vibration generated in the vibration generating region, and the volume of the entire resonance space can be changed, so that the vibration can be attenuated more reliably. As a result, the damping performance can be improved more reliably.

  The attenuation adding device according to the present invention is connected to a pressure sensor for detecting vibration in the vibration generating region, the pressure sensor, the opening / closing means, and the flow rate adjusting means, and based on a signal from the pressure sensor. And a controller for opening and closing the opening and closing means and adjusting the fluid by the flow rate adjusting means.

  In the present invention, since the flow rate adjusting means can be adjusted according to the frequency in the frequency domain of the vibration generated in the vibration generating region from the above-described attenuation adding device, the vibration generated in the vibration generating region can be attenuated more reliably. As a result, the damping performance can be improved more reliably.

  The combustor according to the present invention includes a combustion region for burning fuel, and includes the damping addition device with the combustion region as the vibration generation region.

  In the present invention, the damping adder is provided in the combustor, and the combustion region of the combustor is used as the vibration generating region, so that the combustion vibration in a wide frequency range during the combustion of the fuel can be attenuated by the damping adder. In the attenuation adding device, it is not necessary to match the number of openings to the formed resonance space, and only one opening may be used. There is no need to provide a section. As a result, vibrations in a wide frequency range can be easily damped and durability can be ensured.

  The combustor according to the present invention includes a combustion region for burning fuel, and an exhaust gas sensor for detecting a component of exhaust gas after combustion of fuel in the combustion region, and the combustion region is defined as the vibration generation region. And the control unit performs opening / closing of the opening / closing means and adjustment of the fluid by the flow rate adjusting means based on a signal from the exhaust gas sensor.

  In this invention, the opening / closing of the opening / closing means and the adjustment of the fluid by the fluid adjusting means are performed based on the exhaust gas detected by the exhaust gas sensor in addition to the vibration frequency detected by the pressure sensor. In the damping addition device, vibrations can be reduced by adjusting the air entering from the outside air introduction section with the flow rate adjusting means so that a large amount of air enters the resonance space. On the other hand, NOx contained in the exhaust gas at the time of combustion can be reduced as the lean combustion, but if the air outside the damping addition device is flowed into the resonance space in order to reduce vibration, it is used for fuel combustion. There is a possibility that the air is reduced, lean combustion cannot be performed, and NOx increases. For this reason, when air flows into the resonance space from the outside air introduction section, it is necessary to flow in an amount of air corresponding to the compromise between vibration and the amount of NOx, and the exhaust gas sensor detects exhaust gas to detect NOx. Is detected. As a result, it is possible to achieve both vibration attenuation and improved exhaust gas properties.

  The gas turbine according to the present invention includes the combustor.

  In the present invention, by providing the above-described combustor in the gas turbine, vibrations in a wide frequency range can be easily damped among the combustion vibrations during the operation of the gas turbine. Moreover, since the opening part to a combustion area | region can be restrained to the minimum number, durability of a combustor is securable. As a result, vibrations in a wide frequency range can be easily damped and durability can be ensured. Furthermore, a high-quality gas turbine can be obtained by having such characteristics.

  ADVANTAGE OF THE INVENTION The damping addition apparatus, combustor, and gas turbine concerning this invention have the effect that it can attenuate | dampen the vibration of a wide frequency range easily, and can ensure durability.

  Embodiments of an attenuation adding device according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a cross-sectional view of a gas turbine including an attenuation adding device according to Embodiment 1 of the present invention. The gas turbine 1 shown in the figure is provided with an air intake 2, a compressor 3, a combustor 10, and a turbine 4 from the upstream side to the downstream side of the air flow. The air taken in from the air intake 2 is compressed by the compressor 3 and is sent to the combustor 10 as high-temperature and high-pressure compressed air. The combustor 10 is provided with a pilot nozzle (not shown) and a main nozzle (not shown), and the compressed air sent from the compressor 3 is supplied with gas fuel such as natural gas by the pilot nozzle or the main nozzle, or Liquid fuel such as light oil and light heavy oil is supplied to burn the fuel, generating high-temperature and high-pressure combustion gas. The high-temperature and high-pressure combustion gas generated by the combustion of the fuel in the combustor 10 is then injected into the turbine 4.

  FIG. 2 is a schematic diagram of a main part of the attenuation adding device according to the first embodiment of the present invention. The combustor 10 includes a damping addition device 20. The damping addition device 20 is provided outside the combustion chamber 11 having the combustion region 12 on the inside, and the combustion chamber 11 and the damping addition device 20 are provided in the vehicle compartment 13 of the combustor 10 (see FIG. 1). It has been. The attenuation adding device 20 has an attenuation portion 21, which is connected to the combustion chamber 11 and opens to the combustion region 12 through an opening 22. The attenuation unit 21 is provided with three resonance chambers 30, and the resonance chambers 30 are connected to each other by a connection unit 40. The resonance chamber 30 and the connection portion 40 have a space inside, and the internal spaces of both the resonance chamber 30 and the connection portion 40 connected to each other are in communication. The internal space of the resonance chamber 30 and the internal space of the connection portion 40 are both formed as a resonance space 25.

  Moreover, the connection form of the three resonance chambers 30 connected by the connection portion 40 is connected in series in the entire resonance chamber 30. That is, of the three resonance chambers 30, one resonance chamber 30 is connected to both of the other two resonance chambers 30, and the two resonance chambers 30 are not connected to each other. In addition, among the resonance chambers 30 connected in series, the resonance chamber 30 located at one end is connected to the combustion chamber 11 by a connection portion 40, and the connection portion 40 is opened to the combustion region 12. is doing. This portion is formed as the opening portion 22, and the attenuation portion 21 is connected to the combustion chamber 11 by connecting one of the connection portions 40 to the combustion chamber 11 in this way. In this way, the three resonance chambers 30 and the connection portion 40 connected in series are the first resonance chamber 31, the second resonance chamber 32, and the third resonance chamber in order from the side closer to the combustion chamber 11. The connection portion 40 is formed as 33, and is closer to the combustion chamber 11, that is, in order from the connection portion 40 connected to the combustion chamber 11, the first connection portion 41, the second connection portion 42, and the third connection portion. 43 is formed. Thereby, the order which united the resonance chamber 30 and the connection part 40 is the 1st connection part 41, the 1st resonance chamber 31, the 2nd connection part 42, the 2nd resonance chamber 32, and the 3rd connection in order from the combustion chamber 11 side. A portion 43 and a third resonance chamber 33 are formed.

  Moreover, the connection part 40 which connects the resonance chambers 30 is provided with an opening / closing valve 50 serving as an opening / closing means. This on-off valve 50 is provided in all the connecting portions 40, the on-off valve 50 provided in the first connecting portion 41 is the first on-off valve 51, and the on-off valve 50 provided in the second connecting portion 42 is the second on-off. The opening / closing valve 50 provided in the valve 52 and the third connection portion 43 is formed as a third opening / closing valve 53. Since these on-off valves 50 can open and close the flow paths by operating the on-off valves 50, the connection portions 40 can be opened and closed by opening and closing each of the on-off valves 50. . For this reason, when the on-off valve 50 provided in the connection part 40 between the resonance chambers 30 is opened and closed, the resonance chambers 30 positioned at both ends of the connection part 40 are communicated or blocked. Further, when the opening / closing valve 50 provided in the connecting portion 40 between the resonance chamber 30 and the combustion chamber 11, that is, the first opening / closing valve 51 is opened / closed, the damping portion 21 and the combustion region 12 communicate with each other or are blocked. Is done.

  The attenuation adding device 20 according to the first embodiment is configured as described above, and the operation thereof will be described below. When the gas turbine 1 is operated, high-temperature and high-pressure air compressed by the operation of the compressor 3 is sent to the combustor 10, and fuel is supplied from the pilot nozzle and the main pilot nozzle to the compressed air. By injecting fuel, fuel burns in the combustion region 12 of the combustion chamber 11. When fuel burns in the combustion region 12, combustion vibration may occur due to the combustion. In particular, when the fuel is lean burned in order to reduce the NOx emission, the combustion tends to become unstable and combustion vibrations are likely to occur. When the fuel is burned in the fuel chamber 11, combustion vibrations may occur in the combustion region 12 as described above. Therefore, the inside of the combustion chamber 11 is not only the combustion region 12 but also formed as a vibration generation region. .

  When combustion vibration occurs in this way, air vibration (pressure wave) due to combustion vibration is generated from the opening portion 22 of the attenuation portion 21 to the inside of the connection portion 40 having the opening portion 22, that is, the first connection portion 41. to go into. Thereby, the vibration due to the combustion vibration enters the resonance space 25 of the attenuation unit 21 of the attenuation adding device 20 from the opening 22. Thus, when the first on-off valve 51 provided in the first connection portion 41 is closed when vibration enters the resonance space 25, the vibration that has entered the resonance space 25 from the opening portion 22 is generated by the first on-off valve 51. Therefore, the vibration cannot proceed further to the resonance chamber 30 side than the first opening / closing valve 51, that is, from the first opening / closing valve 51.

  Here, when vibration enters the resonance space 25 from the combustion region 12, vibration in the frequency region corresponding to the volume of the resonance space 25 resonates in the resonance space 25, and the vibration in the frequency region is attenuated by this resonance. Since the resonance space 25 has such an action, vibrations that enter the resonance space 25 of the first connection portion 41 from the opening portion 22 close the first opening / closing valve 51 provided in the first connection portion 41. If so, the vibration resonates in the resonance space 25 between the opening 22 and the first opening / closing valve 51. Therefore, the vibration that has entered the resonance space 25 from the opening 22 resonates with the vibration in the frequency domain corresponding to the volume of the resonance space 25 between the opening 22 and the first opening / closing valve 51. Is attenuated.

  When the second opening / closing valve 52 is closed and the first opening / closing valve 51 is opened, the second connection portion 41 and the first resonance chamber 31 and the second connection portion 42 from the first resonance chamber 31 to the second opening are also provided. The resonance space 25 to the opening / closing valve 52 is communicated. Therefore, the vibration from the opening 22 passes through the first opening / closing valve 51 and enters the first resonance chamber 31, enters the second connection portion 42, and is blocked by the second opening / closing valve 52. Thereby, each resonance space 25 of the 1st connection part 41 and the 1st resonance chamber 31, and also the resonance space 25 of the 2nd connection part 42 from the 1st resonance chamber 31 to the 2nd opening-and-closing valve 52 are the combustion fields 12. The volume of the resonance space 25 attenuates the vibration of The resonance space 25 for attenuating vibration has a characteristic of attenuating vibration in a frequency region of a lower frequency as the volume increases, but the first on-off valve 51 is closed by opening the first on-off valve 51 as described above. Since the volume of the resonance space 25 is larger than the case, vibrations in a lower frequency region can be attenuated.

  When the third on-off valve 53 is closed and both the first on-off valve 51 and the second on-off valve 52 are opened, the first connection portion 41, the first resonance chamber 31, the second connection portion 42, the second resonance valve Each resonance space 25 of the chamber 32 and the resonance space 25 of the third connection portion 43 from the second resonance chamber 32 to the third opening / closing valve 53 serve as a volume of the resonance space 25 that attenuates the vibration of the combustion region 12. . For this reason, the volume of the resonance space 25 when the third opening / closing valve 53 is closed and both the first opening / closing valve 51 and the second opening / closing valve 52 are opened is the resonance when the second opening / closing valve 52 is closed as described above. Since it becomes larger than the volume of the space 25, vibration in a lower frequency region can be damped as compared with the case where the second opening / closing valve 52 is closed.

  Further, when all of the first opening / closing valve 51, the second opening / closing valve 52, and the third opening / closing valve 53 are opened, the first connection portion 41, the first resonance chamber 31, the second connection portion 42, and the second resonance chamber 32 are opened. All the resonance spaces 25 of the third connection portion 43 and the third resonance chamber 33 serve as a volume of the resonance space 25 that attenuates the vibration of the combustion region 12. For this reason, the volume of the resonance space 25 when all of the on-off valves 50 are opened is larger than the volume of the resonance space 25 when the third on-off valve 53 is closed as described above. Compared with the case where 53 is closed, vibration in a lower frequency region can be attenuated.

  The attenuation adding device 20 described above is provided with a plurality of resonance spaces 25 as inner spaces by providing a plurality of resonance chambers 30 and connection portions 40 in the attenuation unit 21. Further, by providing the opening / closing valve 50 in each of the plurality of connecting portions 40, the resonance chambers 30 and the resonance spaces 25 of the connection portions 40 are communicated or blocked. Thereby, the volume of the whole resonance space 25 can be changed easily. The vibration generated in the combustion region 12 is attenuated when the vibration in the frequency region corresponding to the volume of the resonance space 25 resonates in the resonance space 25. However, as described above, the entire resonance space 25 is attenuated. Since the volume of the vibration can be easily changed, the frequency range of the vibration to be damped can be easily changed. In the combustion region 12, combustion vibrations in various frequency regions are generated. Thus, the frequency region of the vibration to be attenuated can be easily changed, so that vibrations in a plurality of frequency regions or a wide frequency region are attenuated. it can.

  In addition, by providing a plurality of resonance chambers 30 and connection portions 40, a plurality of resonance spaces 25 are provided. The resonance chambers 30 and connection portions 40 are connected to other resonance chambers 30 or connection portions 40, respectively. Therefore, only the first connection portion 41 is connected to the combustion chamber 11, and only the opening portion 22 is open to the combustion region 12. This combustion region 12 generates high-temperature and high-pressure combustion gas when the fuel burns, and also generates combustion vibrations. Therefore, the combustion chamber 11 needs to be made strong in order to have durability. However, if a plurality of openings 22 are formed in the combustion chamber 11, the durability may be reduced. Therefore, by reducing the number of openings 22 to one, the reduction in durability can be suppressed. As a result, vibrations in a wide frequency range can be easily damped and durability can be ensured.

  Further, the connection part 40 and the resonance chamber 30 are connected one after another to the end in the air flow direction, and the connection part 40 and the resonance chamber 30, that is, the plurality of resonance spaces 25 are connected in series. Thereby, the plurality of resonance spaces 25 can be easily connected and provided. As a result, vibrations in a wide frequency range can be attenuated more easily.

  Further, by providing the combustor 10 with the damping addition device 20 as a vibration generation region of the vibration that is attenuated by the damping addition device 20, the combustion vibration at the time of combustion of fuel in the combustor 10 is damped and added. It can be damped by the device 20, and vibrations in a wide frequency range can be easily damped. Further, it is possible to ensure the durability of the combustor 10 having the combustion region 12 that becomes high temperature and high pressure. Further, by providing the combustor 10 in the gas turbine 1, vibrations in a wide frequency range among the combustion vibrations during the operation of the gas turbine 1 can be easily damped and durability can be ensured. In addition, by providing the gas turbine 1 with the combustor 10 provided with the damping addition device 20, a high-quality gas turbine having excellent damping performance and excellent durability can be obtained.

  Note that the number of the resonance chambers 30 and the connection portions 40 may be other than three. The resonance chamber is a number that can effectively attenuate combustion vibrations according to the combustion characteristics of the combustor 10 equipped with the damping addition device 20 and the volume of the resonance space 25 of each resonance chamber 30 and connection 40. The number of 30 and the connection part 40 is not ask | required.

  This attenuation adding device has substantially the same configuration as the attenuation adding device according to the first embodiment, but is characterized in that resonance spaces are connected in parallel. Since other configurations are the same as those of the first embodiment, the description thereof is omitted and the same reference numerals are given. FIG. 3 is a schematic diagram of a main part of an attenuation adding device according to Embodiment 2 of the present invention. In the damping addition device 60 shown in the figure, similarly to the damping addition device 20 according to the first embodiment, a first connection portion 71 is connected to the combustion chamber 11, and an opening opened to the combustion region 12 is connected to these connection portions. A portion 22 is formed. The end of the first connecting portion 71 opposite to the end on the opening 22 side is connected to the first resonance chamber 61. The first connecting portion 71 and the first resonance chamber 61 both have a resonance space 25 inside, and both resonance spaces 25 are in communication. The first resonance chamber 61 is connected to a second connection portion 72, a third connection portion 73, and a fourth connection portion 74 at different positions. The second connection part 72, the third connection part 73, and the fourth connection part 74 are all formed as a resonance space 25, and each of the second connection part 72, the third connection part 73, and the fourth connection part 74 is formed at a different position with respect to the first resonance chamber 61. The chamber 61 communicates with the resonance space 25.

  In addition, the resonance chamber 30 is connected to the end of the second connection portion 72, the third connection portion 73, and the fourth connection portion 74 opposite to the end connected to the first resonance chamber 61. The second connection chamber 72 is connected to the second resonance chamber 62, the third connection portion 73 is connected to the third resonance chamber 63, and the fourth connection portion 74 is connected to the fourth resonance chamber 64. The second resonance chamber 62, the third resonance chamber 63, and the fourth resonance chamber 64 have a resonance space 25 therein, and the second resonance chamber 62 includes the second connection portion 72 and the third resonance chamber 63 includes The third connection portion 73 and the fourth resonance chamber 64 are communicated with the resonance space 25 of the fourth connection portion 74. On the other hand, the resonance spaces 25 of the second resonance chamber 62, the third resonance chamber 63, and the fourth resonance chamber 64 are mutually connected to the resonance space 25 of the other resonance chamber 30 via the resonance space 25 of the first resonance chamber 61. There is no communication except for the route. That is, the resonance chambers 30 are connected in parallel, whereby the plurality of resonance spaces 25 are connected in parallel.

  In the resonance chamber 30 formed in this way, the first resonance chamber 61 and the third resonance chamber 63 have the resonance space 25 having substantially the same volume, and the second resonance chamber 62, the fourth resonance chamber 64, and the like. Have resonance spaces 25 having substantially the same volume, and the resonance spaces 25 of the second resonance chamber 62 and the fourth resonance chamber 64 are more than the resonance spaces 25 of the first resonance chamber 61 and the third resonance chamber 63. The volume is small.

  Each connection portion 40 is provided with an opening / closing valve 50 serving as an opening / closing means. The first connection portion 71 has a first opening / closing valve 81, the second connection portion 72 has a second opening / closing valve 82, and a third connection. The part 73 is provided with a third on-off valve 83, and the fourth connection part 74 is provided with a fourth on-off valve 84.

  The attenuation adding device 60 according to the second embodiment is configured as described above, and the operation thereof will be described below. When the first opening / closing valve 81 is closed, the resonance space 25 that attenuates the vibration generated in the combustion region 12 is the resonance space from the opening 22 to the first opening / closing valve 81 in the resonance space 25 of the first connection portion 71. 25. For this reason, out of the combustion vibrations generated in the combustion region 12, vibrations in the frequency region corresponding to the volume of the resonance space 25 can be attenuated.

  Further, when the first opening / closing valve 81 is opened and the second opening / closing valve 82, the third opening / closing valve 83, and the fourth opening / closing valve 84 are closed, the resonance space 25 of the first connecting portion 71 and the first resonance chamber 61, The resonance space 25 from the first resonance chamber 61 to the second on-off valve 82 in the second connection portion 72, the resonance space 25 from the first resonance chamber 61 to the third on-off valve 83 in the third connection portion 73, the fourth connection. The resonance space 25 of the part 74 from the first resonance chamber 61 to the fourth open / close valve 84 becomes the volume of the resonance space 25 that attenuates the vibration of the combustion region 12. Therefore, the volume of the resonance space 25 when the first on-off valve 81 is opened and the second on-off valve 82, the third on-off valve 83, and the fourth on-off valve 84 are closed is the same as that of the first on-off valve 81 as described above. Since it becomes larger than the volume of the resonance space 25 when it is closed, vibrations in a lower frequency region can be attenuated as compared with the case where the first on-off valve 81 is closed.

  In addition, when the second opening / closing valve 82 is opened from the above state, the volume of the resonance space 25 that attenuates the vibration of the combustion region 12 is reduced from the volume of the resonance space 25 to the second opening / closing valve 82 of the second connection portion 72. To the second resonance chamber 62 and the resonance space 25 of the second resonance chamber 62 are added. For this reason, the resonance space 25 for attenuating the vibration in the combustion region 12 is larger than that in the above case, so that the vibration in the lower frequency region can be attenuated.

  Further, when the second opening / closing valve 82 is closed from the above state and the third opening / closing valve 83 is opened instead, the second connection portion 72 is cut off at the second opening / closing valve 82 portion. The volume of the resonance space 25 from the second opening / closing valve 82 to the second resonance chamber 62 and the volume of the resonance space 25 of the second resonance chamber 62 are not used, and the third opening / closing valve 83 of the third connection portion 73 is not used. A resonance space 25 up to the third resonance chamber 63 and a resonance space 25 of the third resonance chamber 63 are added. Here, when the resonance space 25 of the second resonance chamber 62 and the resonance space 25 of the third resonance chamber 63 are compared, the volume of the resonance space 25 of the third resonance chamber 63 is larger than the volume of the resonance space 25 of the second resonance chamber 62. Since the volume is larger, the volume of the resonance space 25 that attenuates the vibration of the combustion region 12 becomes larger when the second opening / closing valve 82 is closed and the third opening / closing valve 83 is opened. Thereby, vibration in a lower frequency region can be attenuated.

  In addition, when the third on-off valve 83 is closed from the above state and the second on-off valve 82 and the fourth on-off valve 84 are opened, the third connecting portion 73 is cut off at the portion of the third on-off valve 83. The volume of the resonance space 25 from the third opening / closing valve 83 to the third resonance chamber 63 and the resonance space 25 of the third resonance chamber 63 in the third connection portion 73 is not used, and the second connection portion 72 The resonance space 25 from the second opening / closing valve 82 to the second resonance chamber 62, the resonance space 25 of the second resonance chamber 62, the resonance space 25 from the fourth opening / closing valve 84 to the fourth resonance chamber 64 of the fourth connection portion 74, The resonance space 25 of the fourth resonance chamber 64 is added. Here, when the resonance space 25 of the second resonance chamber 62, the resonance space 25 of the third resonance chamber 63, and the resonance space 25 of the fourth resonance chamber 64 are compared, the second resonance chamber 62 is more than the resonance space 25 of the third resonance chamber 63. Since the volume of the resonance space 25 of the resonance chamber 62 and the resonance space 25 of the fourth resonance chamber 64 is smaller, the third opening / closing valve 83 is closed and the second opening / closing valve 82 and the fourth opening / closing valve 84 are opened. Then, the volume of the resonance space 25 that attenuates the vibration in the combustion region 12 is smaller than in the state where the second opening / closing valve 82 and the fourth opening / closing valve 84 are closed and the third opening / closing valve 83 is opened. Thereby, the vibration which can be damped becomes higher in the frequency region than the above state.

  When all the opening / closing valves 50 are opened, the first connection portion 71, the first resonance chamber 61, the second connection portion 72, the second resonance chamber 62, the third connection portion 73, the third resonance chamber 63, All the resonance spaces 25 of the four connection portions 74 and the fourth resonance chamber 64 serve as a volume of the resonance space 25 that attenuates the vibration of the combustion region 12. For this reason, since the volume of the resonance space 25 when all the opening / closing valves 50 are opened is larger than the volume of the resonance space 25 in each state described above, vibrations in a lower frequency region can be attenuated. Note that a combination other than those described above may be used to connect the resonance spaces 25 of the plurality of connection portions 40 and the plurality of resonance chambers 30 by opening and closing the opening / closing valve 50.

  Since the plurality of resonance chambers 30 are connected in parallel in the above-described attenuation adding device 60, the resonance spaces of the resonance chamber 30 and the connection portion 40 can be combined in various combinations by opening and closing the plurality of opening / closing valves 50. 25 can be communicated. For this reason, when the sizes of the resonance spaces 25 of the plurality of resonance chambers 30 formed are different, the volume of the entire resonance space 25 is increased by opening and closing the plurality of on-off valves 50 and communicating them in combination. The thickness can be changed more finely. Therefore, it is possible to increase the frequency range of vibration that can be damped among the combustion vibrations generated in the combustion region 12. As a result, vibrations in a wide frequency range can be damped easily and more reliably.

  In addition, the resonance chamber 30 and the connection part 40 may each be other than four similarly to the attenuation | damping addition apparatus 20 which concerns on Example 1. FIG. The resonance chamber can be any number that can effectively attenuate the combustion vibration in accordance with the combustion characteristics of the combustor 10 equipped with the damping addition device 60 and the volume of the resonance space 25 of each resonance chamber 30 and the connecting portion 40. The number of 30 and the connection part 40 is not ask | required.

  This attenuation adding device has substantially the same configuration as the attenuation adding device according to the second embodiment, but is characterized in that a fluid resistance member is provided in the resonance space. Since other configurations are the same as those of the second embodiment, the description thereof is omitted and the same reference numerals are given. FIG. 4 is a schematic diagram of a main part of an attenuation adding device according to Embodiment 3 of the present invention. As in the attenuation adding device 60 according to the second embodiment, the attenuation adding device 90 shown in the figure includes a plurality of connection portions 40 and a plurality of resonance chambers 30 connected in parallel. Furthermore, a porous metal 91 serving as a fluid resistance member is provided in the resonance space 25 of the connection portion 40. The porous metal 91 is composed of a porous metal, that is, a metal in which a large number of small holes are formed. The porous metal 91 is formed in a part of the resonance space 25 of each connection portion 40 in each connection portion. The internal shape of 40, that is, the shape of the resonance space 25 is substantially the same. Specifically, the porous metal 91 provided in the resonance space 25 of the first connection portion 41 is provided between the opening 22 and the first opening / closing valve 81, and the second connection portion 72 and the third connection portion are provided. 73 and the porous metal 91 provided in each resonance space 25 of the fourth connection portion 74 is provided between each open / close valve 50 of the connection portion 40 and the first resonance chamber 61. For this reason, the plurality of porous metals 91 that are provided by being provided in the resonance space 25 of each connection portion 40 are separated from the other porous metals 91, respectively.

  The attenuation adding device 90 according to the third embodiment is configured as described above, and the operation thereof will be described below. The porous metal 91 is formed in the resonance space 25 of the connection portion 40, and innumerable small holes are formed in the porous metal 91, so that the gas turbine transmitted to the resonance space 25 of the connection portion 40 is formed. Combustion vibration during one operation passes through the hole of the porous metal 91. At that time, the vibration is converted into heat and attenuated by the friction between the air transmitting the combustion vibration and the wall surface of the hole of the porous metal 91. That is, the combustion vibration is attenuated by the resistance of the porous metal 91.

  In addition, the above-described combustion vibration of fuel by the combustor 10 includes vibrations in a plurality of frequency regions. However, by providing a plurality of porous metals 91 as described above and separating them from each other, Vibration can be damped. Alternatively, the frequency range of vibration that can be damped can be expanded.

  The above damping adding device 90 is provided with the porous metal 91 which is a fluid resistance member in the resonance space 25, so that the vibration generated in the combustion region 12 is not only attenuated by resonance in the resonance space 25 but also porous metal. It can also be attenuated by the resistance of 91. As a result, the attenuation performance can be further improved.

  Further, when adjusting the frequency region of the vibration to be attenuated, not only the volume of the resonance space 25 included in the resonance chamber 30 and the connection portion 40 is changed, but also the size of the porous metal 91 and the holes formed in the porous metal 91. It can also be adjusted by changing the size, density, etc. That is, by changing the resistance value when the combustion vibration passes through the hole of the porous metal 91, the frequency range of the vibration attenuated by the attenuation adding device 90 can be adjusted. As a result, the attenuation performance can be improved more reliably.

  In addition, the combustion vibration includes vibrations in a plurality of frequency regions, and the wavelength of vibration varies depending on the frequency. However, by providing a plurality of porous metals 91 as described above and separating them from each other, different wavelengths are obtained. It is possible to attenuate vibrations having a plurality of frequencies. As a result, the attenuation performance can be improved more reliably.

  In addition, the porous metal 91 provided in the resonance space 25 is not one in the resonance space 25 of each connection part 40, but two or more in one resonance space 25, or the resonance space in which the porous metal 91 is not provided. There may be 25. Since not only the resistance value of the porous metal 91 but also the frequency range of vibration that can be damped by adjusting the number and position changes, the damping performance can be improved more reliably by adjusting these. . Further, the fluid resistance member may be other than the porous metal 91, and for example, a perforated plate in which a plurality of holes are formed, an orifice in which small holes are formed, or the like may be used. The fluid resistance member may be other than the porous metal 91 as long as it becomes resistance to air flowing through the resonance space 25 or vibration and generates a differential pressure. In addition, the configurations of the plurality of resonance chambers 30 and the plurality of connection portions 40 may be other numbers and connection forms than those described above.

  This attenuation adding device has substantially the same configuration as the attenuation adding device according to the third embodiment, but is characterized in that an outside air introduction unit and a flow rate adjusting means are provided in the resonance space. Since other configurations are the same as those of the third embodiment, the description thereof is omitted and the same reference numerals are given. FIG. 5 is a schematic diagram of a main part of an attenuation adding device according to Embodiment 4 of the present invention. As in the attenuation adding device 90 according to the third embodiment, the attenuation adding device 95 shown in the figure has a plurality of connecting portions 40 and a plurality of resonance chambers 30 connected in parallel, and the resonance space 25 has a plurality of porous metals. 91 is provided. An external air introduction path 96 is connected from the resonance chamber 30 in addition to the connection portion 40. The outside air introduction path 96 has a resonance space 25 inside as in the connection portion 40, and a porous metal 91 is provided in the resonance space 25. Also, a plurality of outside air introduction paths 96 are formed, and a part of the outside air introduction paths 96 is provided with an opening / closing valve 50 as in the case of the connecting portion 40.

  Further, a resonance space 25 included in the outside air introduction path 96 is provided outside the attenuation adding device 95 at an end of the outside air introduction path 96 opposite to the end connected to the resonance chamber 30. The outside air introduction part 97 which is a part opened to the space is formed. Further, the outside air introduction path 96 is located between the outside air introduction portion 97 and the resonance chamber 30 in the path from the outside air introduction portion 97 to the resonance chamber 30, and in the vicinity of the outside air introduction portion 97, there is a fluid adjustment. A flow rate adjusting valve 98 as a means is provided. When the flow rate adjustment valve 98 is operated, the opening degree of the flow rate adjustment valve 98 changes, and the amount of fluid passing through the flow rate adjustment valve 98 can be adjusted.

  The attenuation adding device 95 according to the fourth embodiment is configured as described above, and the operation thereof will be described below. The attenuation adding device 95 is provided in the combustion chamber 11, and the combustion chamber 11 is provided in the vehicle compartment 13 (see FIG. 1) of the combustor 10. The combustor 10 is supplied with compressed air from the compressor 3, and this compressed air is first sent to the passenger compartment 13. Thereafter, the fuel flows from the vehicle compartment 13 to the combustion region 12 of the combustion chamber 11. For this reason, the internal pressure of the vehicle compartment 13 is higher than the internal pressure of the combustion region 12, and the resonance chamber 30, the connection portion 40, and the resonance spaces 25 of the outside air introduction path 96 that communicate with the combustion region 12. The internal pressure is lower than the internal pressure of the passenger compartment 13. Further, the outside air introduction path 96 is formed with the outside air introduction section 97, and further, a flow rate adjusting valve 98 is provided in the vicinity of the outside air introduction section 97, but the resonance space 25 of the outside air introduction path 96 is Since the internal pressure is lower than that of the vehicle compartment 13 in which the damping addition device 95 is provided, when the flow rate adjustment valve 98 is opened, the air in the vehicle compartment 13 is outside air due to the pressure difference between the vehicle compartment 13 and the resonance space 25. The air flows from the introduction portion 97 into the resonance space of the outside air introduction path 96.

  This air flows into the resonance chambers 30 and the resonance spaces 25 of the connection portions 40 according to the opening and closing of the open / close valves 50 provided in the connection portions 40. Further, since the opening degree of the flow rate adjusting valve 98 changes when the flow rate adjusting valve 98 is operated, the amount of fluid passing through the flow rate adjusting valve 98 can be adjusted. However, the air flowing into each resonance space 25 is introduced into the outside air. Air introduced from the portion 97 into the resonance space 25 and passing through the flow rate adjusting valve 98 flows through the resonance space. Therefore, by operating the flow rate adjusting valve 98, the amount of air flowing through the resonance space 25 changes. In the resonance space 25, the frequency region of vibration that resonates changes depending on the amount of air flowing through the resonance space 25, and therefore, by operating the flow rate adjusting valve 98 to change the amount of air introduced from the outside air introduction unit 97, resonance is achieved. The frequency region of vibration that attenuates in the space 25 can be changed.

  Further, the flow resistance of the porous metal 91 provided in the resonance space 25 varies depending on the amount of air passing through the porous metal 91. That is, the resistance value of the porous metal 91 changes depending on the flow rate of air, but when the resistance value changes, the frequency region of the vibration that attenuates changes. For this reason, by operating the flow rate adjusting valve 98 according to the frequency region of vibration generated in the combustion region 12 to change the flow rate of air and changing the resistance value of the porous metal 91, vibration in an arbitrary frequency region is obtained. Can be attenuated.

  In addition, when the flow rate adjusting valve 98 is opened, a part of the resonance space 25 of the resonance chamber 30, the connection part 40, and the outside air introduction path 96 is connected from the outside air introduction part 97 to a part where an air path is secured by the plurality of opening / closing valves 50. Since air flows in, the resonance space 25 is purged. In some cases, high-temperature air or unburned fuel enters the resonance space 25 from the combustion region 12. In this case, by purging the resonance space 25, these high-temperature air and unburned fuel are used. Is pushed back in the direction of the combustion zone 12.

  Since the above-described attenuation addition device 95 is provided with the outside air introduction path 96 and the outside air introduction path 96 is provided with the outside air introduction path 96, the air around the attenuation addition device 95, that is, the air in the passenger compartment 13 is transferred to the outside air introduction portion. The air can be introduced from 97 into the resonance space 25 of the outside air introduction path 96 and sent to the resonance space 30 and the resonance space 25 of the connection portion 40. Furthermore, since the flow rate adjusting valve 98 is provided in the vicinity of the outside air introduction unit 97, the flow rate of the air introduced from the outside air introduction unit 97 can be adjusted and sent to each resonance space 25. In the resonance space 25, as described above, the frequency region of vibration that resonates changes depending on the amount of air flowing through the resonance space 25, so that vibration that attenuates in the resonance space 25 by adjusting the flow rate of air with the flow rate adjusting valve 98. Can be changed in frequency range.

  Further, the resistance value of the porous metal 91 changes depending on the flow rate of air passing through the porous metal 91, and the frequency range of vibration attenuated by the porous metal 91 is changed by changing the resistance value. For this reason, the flow rate of air passing through the porous metal 91 can be adjusted by adjusting the amount of air introduced from the outside air introduction portion 97 by the flow rate adjusting valve 98. For this reason, by operating the flow rate adjusting valve 98, the frequency region attenuated by the porous metal 91 can be adjusted. Therefore, by operating the flow rate adjusting valve 98 to adjust the amount of air introduced from the outside air introduction portion 97 into the resonance space 25, the vibration attenuation characteristics in the resonance space 25 can be changed, and further, the porous Since the vibration attenuation characteristic can be changed by changing the resistance value of the solid metal 91, the vibration attenuation characteristic can be changed more reliably. As a result, the damping performance can be improved more reliably.

  In addition, by providing the outside air introduction portion 97, the resonance space 25 of the resonance chamber 30, the connection portion 40, and the outside air introduction path 96 is purged, and high-temperature air or unburned fuel that has entered the resonance space 25 from the combustion region 12 is removed. It can be pushed back to the combustion zone 12. Therefore, these resonance spaces 25 can be maintained in a clean state. As a result, combustion vibration during fuel combustion can be stably damped.

  Although the outside air introduction path 96 is connected to the resonance chamber 30, the outside air introduction path 96 may be connected to the connection portion 40. Since the resonance chamber 25 and the connection portion 40 are all connected directly or indirectly to the resonance space 25, the portion connecting the outside air introduction path 96 may be any portion of the resonance chamber 30 or the connection portion 40. Further, any number of outside air introduction paths 96 may be provided, and any number of outside air introduction portions 97 and flow rate adjusting valves 98 provided in one outside air introduction path 96 may be provided. As long as the combustion vibration can be more reliably damped in accordance with the frequency region of the combustion vibration generated in the combustion region 12, the volume of the resonance space 25, or the internal pressure of the passenger compartment 13 and the resonance space 25, outside air introduction is possible. The position and number of the paths 96 and the number of the outside air introduction portions 97 may be provided in any way.

  This attenuation adding device has substantially the same configuration as the attenuation adding device according to the fourth embodiment, except that a pressure sensor for detecting the pressure in the combustion region and a control unit for controlling the on-off valve and the flow rate adjusting valve are provided. There are features. Since other configurations are the same as those of the fourth embodiment, the description thereof is omitted and the same reference numerals are given. FIG. 6 is a schematic diagram of a main part of an attenuation adding device according to a fifth embodiment of the present invention. The attenuation adding device 100 shown in the figure is provided with an outside air introduction part 97 and a flow rate adjusting valve 98 as in the case of the attenuation adding device 95 according to the fourth embodiment, and further, the flow rate adjusting valve 98 and the opening / closing valve 50 are provided. All are connected, and the control part 101 which controls these flow regulating valves 98 and the on-off valve 50 is provided. Further, the combustion chamber 11 is provided with a pressure sensor 102 for detecting the pressure in the combustion region 12, and this pressure sensor 102 is connected to the control unit 101.

  Further, the control unit 101 is further provided with a storage unit (not shown) and a processing unit (not shown). The storage unit stores a computer program for controlling the attenuation adding device 100 according to the present invention. Here, the storage unit is a hard disk device, a magneto-optical disk device, a nonvolatile memory such as a flash memory (a storage medium that can be read only such as a CD-ROM), or a RAM (Random Access Memory). Such a volatile memory, or a combination thereof.

  The computer program may be one that can control the attenuation adding device according to the present invention in combination with a computer program already recorded in the computer system. Further, the present invention is achieved by recording the computer program for realizing the function of the processing unit on a computer-readable recording medium, causing the computer system to read the computer program recorded on the recording medium, and executing it. Such a control method may be executed. The “computer system” here includes an OS and hardware such as peripheral devices.

  The processing unit includes a memory and a CPU. In order to control the attenuation adding device 100, based on the fluctuation of the pressure in the combustion region 12 detected by the pressure sensor 102, the processing unit reads the computer program into a memory incorporated in the processing unit and performs calculation. At that time, the processing unit appropriately stores a numerical value in the middle of the calculation in the storage unit, and retrieves the stored numerical value and executes the calculation. The processing unit may be realized by dedicated hardware instead of the computer program.

  The attenuation adding device 100 according to the fifth embodiment is configured as described above, and the operation thereof will be described below. When the gas turbine 1 is operated, fuel is combusted in the combustion region 12 of the combustion chamber 11 in the combustor 10, and combustion vibration is generated at that time. When combustion vibration occurs, the internal pressure of the combustion region 12 fluctuates due to the vibration. Since the combustion chamber 11 is provided with the pressure sensor 102, the internal pressure of the combustion region 12, that is, the pressure is detected by the pressure sensor 102, and the detected pressure is connected to the pressure sensor 102 by an electric signal. Is transmitted to the control unit 101. This electrical signal of pressure is transmitted from the pressure sensor 102 to the control unit 101 in time series, and the control unit 101 derives the pressure fluctuation, that is, the vibration frequency from the relationship between the pressure fluctuation and time. This frequency is the frequency of the combustion vibration in the combustion region 12, and the control unit 101 derives the combustion vibration from the pressure thus detected by the pressure sensor 102.

  According to the frequency of the vibration generated in the combustion region 12, the storage unit provided in the control unit 101 opens and closes each of the plurality of on-off valves 50 provided so as to be able to attenuate the vibration of that frequency, and The opening degree of the flow rate adjusting valve 98 is stored in advance. For this reason, by deriving the frequency of combustion vibration based on the signal from the pressure sensor 102, the open / close valve 50 and the flow rate adjusting valve 98 connected to the control unit 101 are opened / closed according to this frequency. A signal for opening / closing the valve 50 and a signal for the opening degree of the flow rate adjusting valve 98 are sent. By this signal, a plurality of opening / closing valves 50 are opened / closed for each opening / closing valve 50, and the opening degree of the flow rate adjusting valve 98 is changed. Thereby, in the resonance space 25 such as the resonance chamber 30 and the connection portion 40, the volume in which the vibration is actually resonated is changed, and the resistance value of the porous metal 91 is changed, so that the combustion vibration is attenuated.

  Although the combustion vibration in the combustion region 12 is attenuated by the action of the above-described attenuation adding device 100, the pressure sensor 102 continues to detect the pressure in the combustion region 12. The vibration after attenuation is detected at 100, and the on-off valve 50 and the flow rate adjusting valve 98 are further controlled according to the frequency of the vibration. Moreover, although the combustion vibration frequency changes from moment to moment depending on the state of combustion, the pressure sensor 102 continues to detect the pressure in the combustion region 12, so that the vibration at that frequency depends on the vibration frequency. The control unit 101 controls the on-off valve 50 and the flow rate adjusting valve 98 so that the valve can be attenuated.

  In the damping addition device 100 described above, the pressure sensor 102 for detecting the pressure in the combustion region 12 is provided in the combustion chamber 11, and a signal detected by the pressure sensor 102 is transmitted to the control unit 101. Can be derived. Since the controller 101 is connected to the opening / closing valve 50 and the flow rate adjusting valve 98, by controlling the opening / closing valve 50 and the flow rate adjusting valve 98 so that the combustion vibration is attenuated according to the frequency of the combustion vibration, Combustion vibration can be damped more reliably. As a result, the damping performance can be improved more reliably.

  FIG. 7 is a schematic diagram of a main part of an attenuation adding device according to a modification of the first embodiment. FIG. 8 is a schematic diagram of a main part of an attenuation adding device according to a modification of the second embodiment. In the above-described attenuation adding device, a plurality of resonance chambers having a resonance space are provided inside, and the resonance chambers are connected to each other by a connecting portion. However, when the resonance space is provided, May not be provided. For example, as shown in FIGS. 7 and 8, a circular pipe part formed by a circular pipe may be provided in the attenuation part, and the inner space may be formed as a resonance space. When the resonance space 25 of the attenuation applying device 110 is connected in series as in the attenuation adding device 20 according to the first embodiment, as shown in FIG. In order to form a plurality of 25, a plurality of open / close valves 50 may be provided in the circular pipe portion 111. Further, when the resonance spaces 25 of the attenuation adding device 115 are connected in parallel, as shown in FIG. 8, a plurality of circular pipes are connected so that the circular pipe part 111 branches in a plurality of directions. A plurality of open / close valves 50 may be provided in the formed circular piping part 111. Thereby, since the commercially available piping member can be used when forming the resonance space 25, the resonance space 25 can be manufactured easily. As a result, the manufacturing cost can be reduced.

  Note that when the resonance space 25 is formed, it is not necessary to form all the resonance spaces 25 with the circular piping portion 111. When the resonance space 25 is formed, the circular piping portion 111, the resonance chamber 30, and the connection portion are formed. 40 may be provided side by side. In addition, in the attenuation adding device 110 having the resonance space 25 formed by the circular pipe portion 111 as described above, the porous metal 91 serving as a fluid resistance member is provided in the same manner as the above-described attenuation adding devices in the third to fifth embodiments. Further, an outside air introduction path 96, an outside air introduction part 97, a flow rate adjustment valve 98 serving as a fluid adjustment means, a control part 101, and a pressure sensor 102 may be provided. By providing these in the attenuation adding device 110 having the resonance space 25 formed by the circular pipe portion 111, the attenuation adding device 110 that can improve the attenuation performance more reliably can be manufactured at low cost. .

  In the fifth embodiment, when the on-off valve 50 and the flow rate adjusting valve 98 are controlled, the control is performed only based on the frequency of the combustion vibration derived from the pressure in the combustion region, but the control is also performed by other factors. May be. For example, in recent gas turbines 1, lean combustion tends to be performed in order to reduce NOx contained in exhaust gas, but air in the vehicle compartment 13 is introduced into the resonance space 25 from the outside air introduction unit 97 in order to reduce vibration. Then, since it enters into the combustion chamber 11 from the passenger compartment 13 and the air used for fuel combustion is reduced, the lean combustion of the fuel becomes difficult. For this reason, if a large amount of air is introduced into the resonance space 25 from the outside air introduction unit 97 in order to reduce vibrations, the amount of air is reduced with respect to the amount of fuel to be burned, so it is difficult to reduce NOx from the exhaust gas. become. Therefore, an exhaust gas sensor (not shown) for detecting NOx in the exhaust gas is provided in the exhaust gas flow path, and the exhaust gas sensor is electrically connected to the control unit 101.

  The exhaust gas sensor detects NOx contained in the exhaust gas of the operating gas turbine 1 and transmits the result to the control unit 101. As described above, the control unit 101 opens and closes the opening / closing valve 50 and attenuates the opening of the flow rate adjustment valve 98 in order to attenuate the vibration, but resonates the air in the vehicle compartment 13 from the outside air introduction unit 97. When the NOx in the exhaust gas detected by the exhaust gas sensor increases to a predetermined amount or more by being introduced into the space 25, the flow rate adjustment valve 98 is prevented from opening more than the opening at that time, or Reduce the opening. As a result, a large amount of air can be fed into the combustion chamber 11, so that lean combustion of the fuel can be maintained and NOx in the exhaust gas can be reduced. That is, since the combustion vibration and the amount of NOx during the operation of the gas turbine 1 tend to contradict each other when the opening degree of the flow rate adjusting valve 98 is changed, the amount of air corresponding to these compromises is supplied to the outside air introduction unit. The opening degree of the flow rate adjusting valve 98 is adjusted so that it can be introduced from 97. As a result, it is possible to achieve both vibration attenuation and improved exhaust gas properties. Note that elements other than the amount of NOx in the exhaust gas described above may be used as elements for controlling the on-off valve 50 and the flow rate adjusting valve 98.

  As described above, the damping addition device, the combustor, and the gas turbine according to the present invention are useful for a gas turbine having a combustor, and are particularly suitable for a case where vibration during combustion of fuel in the combustor is damped. Yes.

It is sectional drawing of a gas turbine provided with the attenuation | damping addition apparatus which concerns on Example 1 of this invention. It is a principal part schematic of the attenuation | damping addition apparatus which concerns on Example 1 of this invention. It is a principal part schematic of the attenuation | damping addition apparatus which concerns on Example 2 of this invention. It is a principal part schematic of the attenuation | damping addition apparatus which concerns on Example 3 of this invention. It is a principal part schematic of the attenuation | damping addition apparatus which concerns on Example 4 of this invention. It is a principal part schematic of the attenuation | damping addition apparatus which concerns on Example 5 of this invention. FIG. 6 is a schematic diagram of a main part of an attenuation adding device according to a modification of the first embodiment. FIG. 10 is a schematic diagram of a main part of an attenuation adding device according to a modification of the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas turbine 2 Air intake 3 Compressor 4 Turbine 10 Combustor 11 Combustion chamber 12 Combustion region 13 Car compartment 20 Attenuation addition device 21 Attenuation portion 22 Opening portion 25 Resonance space 30 Resonance chamber 31 First resonance chamber 32 Second resonance chamber 33 third resonance chamber 40 connection portion 41 first connection portion 42 second connection portion 43 third connection portion 50 on-off valve 51 first on-off valve 52 second on-off valve 53 third on-off valve 60 damping addition device 61 first resonance chamber 62 2nd resonance chamber 63 3rd resonance chamber 64 4th resonance chamber 71 1st connection part 72 2nd connection part 73 3rd connection part 74 4th connection part 81 1st on-off valve 82 2nd on-off valve 83 3rd on-off valve 84 Fourth open / close valve 90 Attenuation addition device 91 Porous metal 95 Attenuation addition device 96 Outside air introduction path 97 Outside air introduction portion 98 Flow rate adjusting valve 100 With attenuation Device 101 control unit 102 pressure sensor 110 damping adding device 111 circular pipe section 115 attenuates additional device

Claims (12)

One opening that is open to a vibration generating region that is a portion where vibration is generated;
An attenuation portion connected to the opening;
A plurality of resonance spaces of the attenuation unit;
A plurality of opening / closing means located between the resonance spaces, for opening and closing the resonance spaces;
An attenuation adding apparatus comprising:   The attenuation adding device according to claim 1, wherein at least three of the plurality of resonance spaces are connected in series.   The attenuation adding device according to claim 1 or 2, wherein at least two of the plurality of resonance spaces are connected in parallel to one resonance space.   The attenuation adding device according to claim 1, wherein a fluid resistance member is provided in the resonance space. A plurality of the fluid resistance members are provided,
The attenuation adding device according to claim 4, wherein the plurality of fluid resistance members are separated from each other. The attenuation part has a circular pipe part formed by a circular pipe,
The attenuation adding device according to any one of claims 1 to 5, wherein the resonance space is formed by the circular pipe portion. In the attenuation part, an outside air introduction part for introducing a fluid outside the attenuation part into the resonance space;
A flow rate adjusting means for adjusting a flow rate of the fluid introduced from the outside air introduction section into the resonance space;
The attenuation adding apparatus according to claim 1, wherein the attenuation adding apparatus is provided. A pressure sensor for detecting vibration in the vibration generating region;
A controller that is connected to the pressure sensor and the opening / closing means, and that opens and closes the opening / closing means based on a signal from the pressure sensor;
The attenuation adding apparatus according to any one of claims 1 to 6, further comprising: A pressure sensor for detecting vibration in the vibration generating region;
A controller for connecting the pressure sensor, the opening / closing means and the flow rate adjusting means, and for opening / closing the opening / closing means and adjusting the fluid in the flow rate adjusting means based on a signal from the pressure sensor;
The attenuation adding apparatus according to claim 7, further comprising: Having a combustion zone for burning fuel,
A combustor comprising the damping addition device according to any one of claims 1 to 9, wherein the combustion region is the vibration generation region. A combustion region for burning fuel, and an exhaust gas sensor for detecting a component of exhaust gas after combustion of fuel in the combustion region,
The damping addition device according to claim 9, comprising the combustion region as the vibration generation region,
The combustor, wherein the controller performs opening / closing of the opening / closing means and adjustment of the fluid by the flow rate adjusting means based on a signal from the exhaust gas sensor.   A gas turbine comprising the combustor according to claim 10 or 11.

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