Combustors, combustor systems, and gas turbines

Abstract

To provide a combustor that can detect a flashback with a simple configuration.SOLUTION: A combustor comprises: a baseboard extending in a direction orthogonal to a combustor axis; a plurality of premixing pipes which extend so as to penetrate the baseboard and inject, from a downstream-side opening, a premixed gas which is generated by mixing of fuel with air introduced from an upstream side; and a temperature detection circuit provided on the baseboard and extending in a direction orthogonal to the combustor axis so as to pass around the premixing pipes. The temperature detection circuit has a start point and an end point serving as an output terminal of the temperature detection circuit, and also has a plurality of contact points which are formed by alternate connection of multiple positive element wires and negative element wires from the start point side toward the end point side.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a combustor, a combustor system, and a gas turbine.

Background Art

[0002] For example, Patent Document 1 discloses a cluster combustor as an example of a combustor used in a gas turbine. The cluster combustor has a number of premixing tubes arranged side by side and into which air is introduced. The air introduced into the premixing tubes is mixed with fuel and ejected as premixed gas from an opening on the downstream side of the premixing tubes. At this time, when the premixed gas ignites, a plurality of small-scale flames are formed at the outlets of the respective premixing tubes.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a combustor as described above, flashback may occur in which the flame flows backward along the wall surface in the premixing tube. This flashback may occur locally in a specific premixing tube, and in order to detect this, it was necessary to install a number of sensors according to the number of premixing tubes.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a combustor, a combustor system, and a gas turbine capable of detecting flashback with a simple configuration.

Means for Solving the Problems

[0006] To solve the above problems, the combustor according to the present disclosure comprises a substrate extending in a direction perpendicular to the combustor axis, a plurality of premixing tubes extending through the substrate and injecting a premixed gas generated by mixing fuel with air introduced from the upstream side from an opening on the downstream side, and a temperature sensing circuit provided on the substrate and extending in a direction perpendicular to the combustor axis so as to pass around each of the premixing tubes, wherein the temperature sensing circuit has a starting point and an ending point that serve as the output terminals of the temperature sensing circuit, and has a plurality of contacts formed by alternately connecting a plurality of positive and negative wires from the starting point side toward the ending point side.

[0007] The combustor system according to this disclosure comprises the combustor described above and a calculation device that detects flashbacks based on the voltage value output from the output terminal.

[0008] The gas turbine according to this disclosure comprises a compressor for compressing air, a combustor system into which the air is introduced to generate combustion gas, and a turbine driven by the combustion gas. It is equipped with. [Effects of the Invention]

[0009] The combustor, combustor system, and gas turbine of this disclosure enable the detection of flashbacks with a simple configuration. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram showing the general configuration of a gas turbine according to the first embodiment of this disclosure. [Figure 2] This is a longitudinal cross-sectional view showing the schematic configuration of a combustor in a combustor system according to the first embodiment of this disclosure. [Figure 3] This is a view of the combustor of the combustor system according to the first embodiment of this disclosure, as seen from the downstream side. [Figure 4] This is a schematic diagram illustrating the principle of the temperature detection circuit for the combustor in the combustor system according to the first embodiment of this disclosure. [Figure 5]It is a functional block diagram of an arithmetic unit of a combustor system according to a first embodiment of the present disclosure. [Figure 6] It is a flowchart for explaining the processing flow of an arithmetic unit of a combustor system according to a first embodiment of the present disclosure. [Figure 7] It is a view of a combustor of a combustor system according to a second embodiment of the present disclosure as seen from the downstream side. [Figure 8] It is a schematic diagram showing the principle of a temperature detection circuit of a combustor of a combustor system according to a second embodiment of the present disclosure. [Figure 9] It is a view of a combustor of a combustor system according to a third embodiment of the present disclosure as seen from the downstream side. [Figure 10] It is a functional block diagram of an arithmetic unit of a combustor system according to a third embodiment of the present disclosure. [Figure 11] It is a flowchart for explaining the processing flow of an arithmetic unit of a combustor system according to a third embodiment of the present disclosure. [Figure 12] It is a view of a combustor of a combustor system according to a fourth embodiment of the present disclosure as seen from the downstream side. [Figure 13] It is a functional block diagram of an arithmetic unit of a combustor system according to a fourth embodiment of the present disclosure. [Figure 14] It is a flowchart for explaining the processing flow of an arithmetic unit of a combustor system according to a fourth embodiment of the present disclosure. [Figure 15] It is a longitudinal sectional view showing a schematic configuration of a combustor in a combustor system according to a fifth embodiment of the present disclosure. [Figure 16] It is a partially enlarged view of FIG. 14. [Figure 17] It is a cross-sectional view taken along line A-A of FIG. 15. [Figure 18] It is a view showing a combustor according to a modification of the fifth embodiment. [Figure 19] It is a hardware configuration diagram of an arithmetic unit according to each embodiment of the present disclosure.

Modes for Carrying Out the Invention

[0011] <First Embodiment> The first embodiment of the present invention will be described in detail below with reference to Figures 1 to 6. As shown in Figure 1, the gas turbine 1 according to this embodiment includes a compressor 2 for compressing air A, a combustor 3a for generating combustion gas C, and a turbine 4 driven by the combustion gas C. Multiple combustors 3a are provided around the rotating shaft of the gas turbine 1 at circumferential intervals. The combustors 3a mix fuel F with air A compressed by the compressor 2 and burn it to produce high-temperature, high-pressure combustion gas C.

[0012] <Combustion device> The configuration of the combustor 3a will be described below with reference to Figures 2 to 6. As shown in Figure 2, the combustor 3a includes an outer cylinder 10, an end cover 11, an inner cylinder 13, a support part 15, a substrate 20, and a temperature sensing circuit 50 (see Figure 3).

[0013] <Outer cylinder> The cylindrical body is shaped like a cylinder centered on the central axis O (combustion chamber axis O) of the combustor 3a.

[0014] <End cover> The end cover 11 is disc-shaped and closes off one end of the outer cylinder 10 in the direction of axis O (the left side in Figure 2). The end of the outer cylinder 10 in the direction of axis O is in contact with the end cover 11.

[0015] <Inner cylinder> The inner cylinder 13 is coaxially positioned inside the outer cylinder 10. The inner cylinder 13 is cylindrical in shape, extending in the direction of axis O inside the outer cylinder 10. One end of the inner cylinder 13 in the direction of axis O is spaced apart from the end cover 11 in the direction of axis O. The outer diameter of the inner cylinder 13 is smaller than the inner diameter of the outer cylinder 10. As a result, an annular flow path is formed between the outer circumferential surface 23 of the inner cylinder 13 and the inner circumferential surface of the outer cylinder 10. Compressed air A from the compressor 2 flows through this flow path from the other side in the direction of axis O (right side in Figure 2) toward the one side in the direction of axis O.

[0016] <Support part> The support portion 15 is a member that extends in the direction of axis O, and multiple support portions are provided at intervals in the circumferential direction. One end of the support portion 15 in the direction of axis O is fixed to the inner circumference side of the outer cylinder 10 and to the surface of the end cover 11 facing the other side in the direction of axis O. The air A that has been flowing between the outer cylinder 10 and the inner cylinder 13 in one direction in the direction of axis O reverses its direction of flow to the other side in the direction of axis O as it passes between adjacent support portions 15.

[0017] <Combustion Plate> The substrate 20 is disc-shaped with its axis O. The substrate 20 is positioned so that its outer circumferential surface 23 is coaxially fitted inside the inner cylinder 13. The substrate 20 has an upstream end face 21 and a downstream end face 22.

[0018] <Upstream end face> The upstream end face 21 is an end face on the substrate 20 that faces one side in the direction of axis O, and has a planar shape perpendicular to axis O. The upstream end face 21 is positioned at the same axial position as the end face on one side in the direction of axis O of the inner cylinder 13.

[0019] <Downstream end face> The downstream end face 22 is an end face of the substrate 20 facing the other side in the direction of axis O, and has a planar shape perpendicular to axis O. The downstream end face 22 is located on one side in the direction of axis O than the other end face of the inner cylinder 13 in the direction of axis O. As a result, a space is formed by the inner circumferential surface of the inner cylinder 13 and the downstream end face 22 of the substrate 20. This space is the combustion space of the combustor 3a.

[0020] <Nozzle> The substrate 20 is provided with a nozzle 30, which serves as a premixing tube, that penetrates from the upstream end face 21 to the downstream end face 22. The nozzle 30 has multiple through holes that extend in the direction of axis O. Inside the nozzle 30, there is a flow path where one side in the direction of axis O is the upstream side and the other side in the direction of axis O is the downstream side. Air A flows through this flow path from the upstream side to the downstream side. The nozzle 30 extends in a straight line and has a uniform inner diameter along the axis O. Multiple nozzles 30 are arranged side by side at intervals from each other in a direction perpendicular to the axis O.

[0021] Here, a plenum (not shown) is formed inside the substrate 20, which is a space partitioned to avoid the nozzle 30. Fuel F is supplied to the plenum via a fuel supply pipe (not shown). As a result, the plenum is filled with fuel F. Fuel F can be hydrogen or a mixture of hydrogen and natural gas. Fuel injection holes (not shown) are formed on the inner circumferential surface of the nozzle 30, which connect the flow path within the nozzle 30 to the inside of the plenum. The fuel F filled in the plenum is injected into the nozzle 30 through the fuel injection holes.

[0022] <Temperature detection circuit> As shown in Figure 3, the temperature sensing circuit 50 is a circuit (thermostat) for detecting a local temperature rise in each nozzle 30. The temperature sensing circuit 50 is formed to extend in a direction perpendicular to the axis O, and in this embodiment, it is formed in a planar shape so as to be stacked on the surface of the downstream end face 22. In this embodiment, multiple temperature sensing circuits 50 are arranged in parallel without interfering with each other. Each temperature sensing circuit 50 extends in a meandering manner, passing around the openings of multiple nozzles 30 while avoiding the nozzles 30.

[0023] As shown in Figure 4, the temperature sensing circuit 50 extends in a single path from the starting point S to the ending point E without branching. The starting point S and the ending point E are the output terminals 70 of the temperature sensing circuit 50. The temperature sensing circuit 50 is formed by connecting multiple positive wires 51 and negative wires 52 alternately from the starting point S to the ending point E. The connections between the positive wires 51 and negative wires 52 are contacts. Multiple contacts are provided, corresponding to the number of connections between the positive wires 51 and negative wires 52. In the temperature sensing circuit 50, at least one contact exists around each nozzle 30.

[0024] As materials for the positive wire 51 and the negative wire 52, a combination of dissimilar metals that exhibit the Seebeck effect can be appropriately adopted. Examples of materials for the positive wire 51 and the negative wire 52 include Chromel-Alumel, iron-constantan, copper-constantan, Chromel-constantan, platinum-rhodium alloy-platinum, etc. In these cases, the positive wire 51 functions as the + leg and the negative wire 52 functions as the - leg.

[0025] Here, as shown in detail in Figure 4, the contact formed by connecting the positive wire 51 and the negative wire 52 in that order from the starting point S to the ending point E of the temperature sensing circuit 50 is a hot junction H. Also, the contact formed by connecting the negative wire 52 and the positive wire 51 in that order from the starting point S to the ending point E of the temperature sensing circuit 50 is a cold junction L.

[0026] As shown in Figure 4, when a localized temperature rise occurs in one of the multiple nozzles 30, only the hot junction H adjacent to that nozzle 30 is heated. As a result, a temperature gradient of ΔT is generated in the positive element wire 51 between the heated hot junction H and the adjacent cold junction L on the starting point S side, resulting in ΔV due to the Seebeck effect. + An electromotive force is generated. On the other hand, a temperature gradient of -ΔT is generated in the negative element wire 52 between the heated hot junction H and the adjacent cold junction L at the endpoint E, resulting in ΔV due to the Seebeck effect. - An electromotive force is generated. Therefore, the temperature sensing circuit 50 as a whole will generate an electromotive force of ΔV.

[0027] Furthermore, if the contact point adjacent to the nozzle 30 where a localized temperature rise occurs is a cold junction L, an electromotive force will be generated in the opposite direction to that described above. In other words, a temperature gradient of ΔT is generated in the negative element wire 52 between the heated cold junction L and the adjacent warm junction H on the starting point S side, resulting in -ΔV due to the Seebeck effect. + An electromotive force is generated. On the other hand, a temperature gradient of -ΔT is generated in the positive element wire 51 between the heated cold junction L and the adjacent hot junction H at the endpoint E, resulting in -ΔV due to the Seebeck effect. - An electromotive force is generated. Therefore, the temperature sensing circuit 50 as a whole will generate an electromotive force of -ΔV.

[0028] Such a temperature sensing circuit 50 is formed on the surface of the downstream end face 22 by various wiring pattern formation methods such as vapor deposition, thermal spraying, and 3D printing. Preferably, the temperature sensing circuit 50 is formed using a drawing device that directly draws on the surface of the downstream end face 22. The drawing device can be a device that can continuously arrange linear metal, such as a welding robot or a metal 3D printer. Welding devices such as LMD (Laser Metal Deposition) devices can also be used. Alternatively, the temperature sensing circuit 50 may be formed by directly laying the positive element wires 51 and negative element wires 52 as wire materials.

[0029] <Combustion System> In this embodiment, calculation devices 100, 200, and 300 are further provided for detecting flashbacks of the combustor 3a. The combustor system 3 is composed of the combustor 3a and the calculation devices 100, 200, and 300.

[0030] <Arithmetic device> As shown in Figure 5, the calculation unit 100 has a voltage acquisition unit 110 and a determination unit 120. The voltage acquisition unit 110 acquires the voltage value between the start point S and the end point E, which are the output terminals 70 of the temperature detection circuit 50 of the combustor 3a. If there are multiple temperature detection circuits 50, the voltage acquisition unit 110 adds the voltage value before each temperature detection circuit 50. The determination unit 120 determines whether the voltage value acquired by the voltage acquisition unit 110 exceeds a predetermined threshold.

[0031] Next, the processing flow of the arithmetic unit 100 will be explained with reference to the flowchart in Figure 6. In the calculation unit 100, the voltage acquisition unit 110 first acquires the voltage value from the temperature detection circuit 50 (step S11). Next, the determination unit 120 determines whether the voltage value acquired by the voltage acquisition unit 110 exceeds a threshold (step S12). If the voltage value does not exceed the threshold, step S11 is executed again. If the voltage value exceeds the threshold, it is detected that a flashback has occurred (step S13).

[0032] <Effects and Effects> Next, the operation and effects of the gas turbine 1 according to this embodiment will be described. As shown in Figure 2, during operation of the gas turbine 1, air A enters each nozzle 30 of the substrate 20 from the upstream side and flows through the nozzle 30 toward the downstream side. Fuel F is injected into the air A within the nozzle 30 to generate a premixed gas M. The premixed gas M is injected from the opening of the nozzle 30 at the downstream end face 22 of the substrate 20 and ignited. This combustion of the premixed gas M generates combustion gas C, which is sent to the turbine 4, driving the turbine 4 to rotate.

[0033] In this case, depending on the operating conditions of the combustor 3a, a flashback may occur in which the flame downstream of the substrate 20 flows back into the nozzle 30. In particular, when the fuel F contains hydrogen, the flame propagation speed increases and the ignition energy decreases significantly, thus increasing the risk of flashback and abnormal combustion. In this embodiment, even if such a flashback occurs locally in some of the nozzles 30 among the multiple nozzles 30, it can be appropriately detected.

[0034] In other words, if a flashback occurs in any of the multiple nozzles 30, the temperature around that nozzle 30 rises abnormally compared to the surrounding area. At that time, the temperature of the contact (hot junction H or cold junction L) near that nozzle 30 rises rapidly. This rapid change in temperature generates a positive or negative electromotive force in the temperature detection circuit 50. By detecting this electromotive force from the output terminal 70 of the temperature detection circuit 50, it becomes possible to detect that a flashback has occurred in any of the nozzles 30. This allows for, for example, avoiding burnout of the combustor 3a by appropriately adjusting the amount of fuel F supplied, and also enables setting appropriate combustion conditions through fuel control.

[0035] If we were to provide thermocouple contacts for each of the multiple nozzles 30, it would be necessary to provide positive and negative wires for each contact, leading to a complex and lengthy circuit. In contrast, in this embodiment, multiple contacts are formed by alternately connecting positive wires 51 and negative wires 52. Therefore, contacts can be provided around each nozzle 30 with a single circuit. Consequently, it becomes possible to detect the occurrence of flashback with a simple configuration.

[0036] Furthermore, since at least one contact point is located around each nozzle 30, localized abnormal temperature increases can be detected for each nozzle 30. Therefore, the occurrence of flashbacks can be appropriately detected.

[0037] Furthermore, since the temperature sensing circuit 50 is located on the downstream end face 22, each contact can directly receive the flashback flame without going through the heat transfer layer. Therefore, the occurrence of a flashback can be detected without delay. Furthermore, the temperature detection circuit 50 may become overly sensitive in detecting temperature rises, potentially leading to false detection of surface temperature variations on the downstream end face 22 as a flashback. To avoid this, a thin heat-shielding coating layer may be provided on the surface of the contacts. This heat-shielding coating layer can be formed, for example, by applying a heat-shielding treatment to the contacts. This allows for sensitivity adjustment so that abnormal temperatures are detected only when a flame flashes back. As a result, false detections can be suppressed. Furthermore, in this embodiment, since multiple temperature detection circuits 50 are provided, the region where the flashback occurred can be identified to some extent by detecting the voltage values ​​of these circuits.

[0038] <Second Embodiment> Next, a second embodiment of the present invention will be described in detail with reference to Figures 7 and 8. In this embodiment, components similar to those in the first embodiment are denoted by the same reference numerals and their detailed descriptions are omitted. In the combustor 3a of the second embodiment, a plurality of nozzles 30 are arranged in a regular grid pattern on the downstream end face 22 of the combustion plate. In this embodiment, a total of 16 nozzles 30 are arranged in a matrix pattern, that is, in a square shape overall, with 4 rows and 4 columns (4 rows and 4 columns).

[0039] The temperature sensing circuit 50 is laid out along the downstream end face 22 in a meandering manner around the multiple nozzles 30. The starting point S and ending point E, which are the output terminals 70 of the temperature sensing circuit 50, are located at the diagonal corners of the square. The temperature sensing circuit 50 extends from the starting point S to the ending point E, passing around all the nozzles 30, in a meandering manner as it moves horizontally, folding back after each vertical column. The temperature sensing circuit 50 extends in a single continuous line from the starting point S to the ending point E without branching along the way.

[0040] At the endpoint E and starting point S, which are the output points of the temperature detection circuit 50, a reference thermocouple 80 is provided to calibrate the deviation from the reference temperature by detecting these temperatures.

[0041] In this embodiment, the temperature detection circuit 50 is provided with contacts that sandwich each nozzle 30. A pair of contacts are positioned opposite each other, sandwiching each nozzle 30 from both sides in the lateral direction (left and right in Figure 7). Both of the opposing contacts are either a hot contact H or a cold contact L; that is, the attributes of the pair of contacts sandwiching each nozzle 30 (whether they are a hot contact H or a cold contact L) are the same.

[0042] For example, as shown in Figure 8, when the temperature of the central nozzle 30 among the three vertically arranged nozzles 30 rises, an electromotive force of ΔV is generated before and after the hot junction H that surrounds the central nozzle 30, as described in the first embodiment. As a result, the temperature detection circuit 50 generates a total electromotive force of 2ΔV. Based on this electromotive force, a flashback is detected, similar to the first embodiment.

[0043] Furthermore, if the pair of contacts sandwiching the temperature-increased nozzle 30 are cold junctions L, an electromotive force of -ΔV is generated before and after the cold junctions L. As a result, the temperature detection circuit 50 generates a total electromotive force of -2ΔV. Based on this electromotive force, a flashback is detected, similar to the first embodiment.

[0044] <Effects and Effects> In this embodiment, the temperature detection circuit is provided in a single continuous line so as to pass near all of the nozzles 30. Therefore, as in the first embodiment, it is possible to detect flashback with a simple configuration while avoiding complexity and length of the circuit.

[0045] Here, if the pair of contacts arranged to sandwich the nozzle 30 were a combination of a hot contact H and a cold contact L, then as the temperature of the nozzle 30 rises, a positive electromotive force will be generated at the hot contact H, while a negative electromotive force will be generated at the cold contact L. In this case, in a single-path temperature detection circuit, the positive and negative electromotive forces will cancel each other out, and the voltage value output from the output terminal 70 will become small or zero.

[0046] In contrast, in this embodiment, since the attributes of the pair of contacts sandwiching one nozzle 30 are identical, the generated electromotive forces do not cancel each other out. Therefore, flashback can be detected appropriately. Furthermore, since the positive and negative signs of the voltage values ​​generated from the contacts that clamp one nozzle 30 are the same, twice the voltage value can be detected. This allows flashback to be detected at a stage where the temperature rise is less, enabling early detection of flashback.

[0047] Furthermore, in this embodiment, of the 16 nozzles 30 arranged in 4 rows and 4 columns, the nozzles 30 in columns 1 and 3 are sandwiched between the cold junctions L, and the nozzles 30 in columns 2 and 4 are sandwiched between the hot junctions H. Therefore, it is possible to determine whether a flashback occurs and whether the nozzle 30 is located in an odd-numbered row or an even-numbered row based on the positive or negative sign of the generated electromotive force.

[0048] <Third Embodiment> Next, a third embodiment of the present invention will be described with reference to Figures 9 to 11. In this embodiment, components similar to those in other embodiments are denoted by the same reference numerals and detailed descriptions are omitted.

[0049] The substrate 20 of the third embodiment has the same configuration as the second embodiment. Here, the 16 nozzles 30 are defined as nozzles No. 1 to No. 16, as shown in Figure 9. Furthermore, in the temperature detection circuit 50 of the third embodiment, in addition to the starting point S and ending point E, two intermediate points I between the starting point S and ending point E are also used as output terminals.

[0050] Specifically, two intermediate points I are provided in the temperature detection circuit, spaced apart from each other. One intermediate point I is located on the temperature detection circuit 50 between nozzle No. 5 30 and nozzle No. 9 30. The other intermediate point I is located on the temperature detection circuit 50 between nozzle No. 8 30 and nozzle No. 12 30.

[0051] In this embodiment, the starting point S is the first output terminal 71, the ending point E is the second output terminal 72, one intermediate point I is the third output terminal 73, and the other intermediate point I is the fourth output terminal 74. The third output terminal 73 and the fourth output terminal 74 are also provided with a reference thermocouple 80, similar to the first output terminal 71 and the second output terminal 72.

[0052] Next, a calculation device 200 of a third embodiment, which constitutes the combustor system 3 together with the combustor 3a, will be described. The calculation device 200 of the third embodiment includes a voltage acquisition unit 210, a determination unit 220, and a region identification unit 230.

[0053] The voltage acquisition unit 210 acquires voltage values ​​between multiple output terminals. In this embodiment, (1) Voltage value between the first output terminal 71 and the second output terminal 72 (2) Voltage value between the first output terminal 71 and the third output terminal 73 (3) Voltage value between the first output terminal 71 and the fourth output terminal 74 (4) Voltage value between the second output terminal 72 and the third output terminal 73 (5) Voltage value between the second output terminal 72 and the fourth output terminal 74 Obtain a total of five voltage values.

[0054] The determination unit 220 determines whether the voltage values ​​of (1) to (5) above exceed a predetermined threshold. The region identification unit 230 identifies which region among the multiple output terminals the flashback occurred in, based on the voltage value that exceeded the threshold among the voltage values ​​(1) to (5).

[0055] Next, the processing flow of the arithmetic unit 200 will be explained with reference to the flowchart in Figure 11. First, the voltage acquisition unit 210 acquires the voltage values ​​between all of the output terminals (1) to (5) above (step S21). Next, the determination unit 220 determines whether the voltage value between the output terminals (1) to (5) exceeds a threshold (step S22). If the voltage value between any of the output terminals does not exceed the threshold, the determination unit 220 executes step S21 again. If the voltage value between any of the output terminals exceeds the threshold, the determination unit 220 detects that a flashback has occurred (step S23).

[0056] Subsequently, the region where flashback occurred is identified based on information between output terminals where the voltage value exceeds the threshold (step S24). The region identification unit 230 identifies the region according to, for example, the table shown in Table 1 below, which is stored in advance.

[0057] [Table 1]

[0058] In Table 1, "1-2" is the voltage value between the first output terminal 71 and the second output terminal 72 as described above. "1-3" is the voltage value between the first output terminal 71 and the third output terminal 73 as described in (2) above. "1-4" is the voltage value between the first output terminal 71 and the fourth output terminal 74 as described in (3) above. "2-3" is the voltage value between the second output terminal 72 and the third output terminal 73 as described in (4) above. "2-4" indicates the voltage value between the second output terminal 72 and the fourth output terminal 74 as described in (5) above. Additionally, "+" indicates that the voltage value for "+" has exceeded the threshold, and "-" indicates that the voltage value for "-" has exceeded the threshold. "0" indicates that no voltage value was detected, or that the detected voltage value did not exceed the threshold.

[0059] According to Table 1, for example, if "1-2" is +, "1-3" is +, "1-4" is +, "2-3" is 0, and "2-4" is 0, it can be determined that a flashback occurred in either nozzle 30 No. 1 or No. 3. Furthermore, for example, if "1-2" is -, "1-3" is -, "1-4" is -, "2-3" is -, and "2-4" is 0, it can be determined that a flashback occurred in either nozzle 30 No. 6 or No. 8. Furthermore, according to Table 1, for example, if "1-2" is -, "1-3" is 0, "1-4" is 0, "2-3" is -, and "2-4" is -, it can be determined that a flashback occurred in either nozzle 30 No. 14 or No. 16.

[0060] As described above, according to this embodiment, the region where flashback occurs can be identified based on the voltage values ​​between multiple output terminals. This makes it possible to reduce the fuel flow rate supplied to the nozzle 30 in the region where flashback occurred, thereby avoiding burnout of the nozzle 30. Furthermore, by increasing the fuel flow rate supplied to the nozzle 30 in the region where flashback did not occur, the overall output reduction of the combustor 3a can be suppressed.

[0061] <Fourth Embodiment> Next, a fourth embodiment of the present invention will be described with reference to Figures 12 to 14. In this embodiment, components similar to those in other embodiments are denoted by the same reference numerals and detailed descriptions are omitted. As shown in Figure 12, in this embodiment, a nozzle segment 40 is formed by the grouping of multiple nozzles 30. One nozzle segment 40 is located in the center, and multiple (five in this embodiment) nozzle segments are arranged on the outer periphery surrounding the central nozzle segment 40.

[0062] Multiple plenums are formed within the substrate 20, each independent of the nozzle 30 segment. That is, multiple (six in this embodiment) plenums are formed within the substrate 20, separated from each other, and each plenum corresponds to each nozzle 30 segment. Fuel F, which is filled in the corresponding plenum, is supplied to the nozzle 30 of each nozzle 30 segment.

[0063] Accordingly, in this embodiment, a fuel supply unit 90 is provided for each of the multiple plenums. The fuel supply unit 90 includes a fuel supply line 91 connected to each plenum and a control valve 92 provided in the fuel supply line 91. The fuel supply line 91 is connected to a fuel source (not shown). Fuel F is supplied to each plenum via the fuel supply line 91. A control valve 92 is provided in each fuel supply line 91. The control valve 92 adjusts the flow rate of fuel F passing through each fuel supply line 91, thereby determining the flow rate of fuel F supplied to each plenum. From each plenum, fuel F is injected into the nozzle 30 in proportion to the amount supplied from the fuel supply unit 90. In other words, the fuel supply unit 90 adjusts the flow rate of fuel F supplied to the nozzle 30 for each nozzle 30 segment.

[0064] In this embodiment, the temperature sensing circuit 50 is provided to correspond to each nozzle 30 segment. The temperature sensing circuit 50 corresponding to the nozzle 30 segment is spread over the installation range of the nozzle 30 segment on the downstream end face 22 so as to pass around each nozzle 30 of the nozzle 30 segment.

[0065] The combustor 3a of this embodiment is accompanied by a computing device 300, thereby constituting the combustor system 3. As shown in Figure 13, the calculation unit 300 includes a voltage acquisition unit 310, a determination unit 320, and a fuel control unit 330. The voltage acquisition unit 310 detects the voltage value output from the temperature detection circuit 50 for each of the 30 segments of the nozzle.

[0066] The determination unit 320 determines whether the voltage value of the temperature detection circuit 50 corresponding to each nozzle 30 segment exceeds a predetermined threshold. The fuel F segment controls the amount of fuel supplied to the plenum corresponding to each nozzle 30 segment according to the determination result of the determination unit 320.

[0067] Next, the processing flow of the arithmetic unit 300 will be explained with reference to the flowchart in Figure 14. First, the voltage acquisition unit 310 acquires the voltage value for each temperature detection circuit 50 corresponding to each nozzle 30 segment (step S31). Next, the determination unit 320 determines whether the voltage values ​​corresponding to each acquired nozzle 30 segment exceed a predetermined threshold (step S32). If these voltage values ​​do not exceed the threshold, step S31 is executed again.

[0068] Then, if the determination unit 320 determines that a specific voltage value has exceeded a threshold, it detects that a flashback has occurred in the nozzle 30 segment corresponding to that voltage value. That is, it identifies the nozzle 30 segment in which the flashback occurred (step S33).

[0069] Subsequently, the fuel control unit 330 controls the amount of fuel F supplied to each nozzle 30 segment (step S34). Specifically, it controls the amount of fuel supplied to the nozzle 30 segment identified as having experienced a flashback to reduce the amount of fuel supplied to that nozzle 30 segment. More precisely, it controls the flow rate of the adjustment valve 92 of the fuel supply unit 90 that supplies fuel F to the nozzle 30 segment. Simultaneously, control is performed to increase the amount of fuel supplied to multiple nozzle 30 segments other than the nozzle 30 segment identified as having experienced a flashback. Specifically, control is performed to increase the flow rate of the control valve 92 of the fuel supply unit 90 that supplies fuel F to these nozzle 30 segments. At this time, the amount of fuel supplied by each control valve 92 is controlled so that the total amount of fuel supplied to the nozzle 30 segments as a whole does not change before and after this control.

[0070] <Effects and Effects> According to this embodiment, since a temperature detection circuit 50 is provided for each of the multiple nozzle 30 segments, it is possible to appropriately detect which of the multiple nozzle 30 segments has experienced a flashback.

[0071] Furthermore, the fuel control unit 330 reduces the amount of fuel supplied to the nozzle 30 segment where flashback occurred, thereby preventing that nozzle 30 segment from burning out. In addition, the supply of fuel F to the other nozzle 30 segments continues, allowing the combustor 3a to continue operating.

[0072] Furthermore, by increasing the fuel supply to the nozzle 30 segment where flashback is not occurring, the overall output of the combustor 3a can be maintained.

[0073] <Fifth Embodiment> Next, a fifth embodiment of the present invention will be described with reference to Figures 15 to 18. In this embodiment, components similar to those in other embodiments are denoted by the same reference numerals and detailed descriptions are omitted. As shown in Figure 12, the combustor 400 of the fifth embodiment differs in its overall configuration from that of the other embodiments. The combustor 400 of the fifth embodiment comprises an outer cylinder 10, an inner cylinder 13, a support section 15, a pilot burner 410, a main burner 420, and a base plate 430 (see Figures 16 and 17).

[0074] The pilot burner 410 is located inside the outer cylinder 10 and the inner cylinder 13. The pilot burner 410 includes a pilot nozzle 411, a pilot burner cylinder 412, and a pilot swarl 415. The pilot nozzle 411 extends along axis O. The base end of the pilot nozzle 411 is connected to the pilot fuel port 416.

[0075] The pilot burner cylinder 412 is provided inside the inner cylinder 13 so as to surround the pilot nozzle 411 from all sides. The pilot burner cylinder 412 has a cylindrical portion 413 that is cylindrical in shape and extends along the axis O, and a pilot cone 414 that is cylindrical in shape and connected to the tip side of the pilot nozzle 411 on the cylindrical portion 413, and which widens in diameter towards the tip side. The pilot swirler 415 is located between the pilot nozzle 411 and the cylindrical portion 413 of the pilot burner cylinder 412.

[0076] Multiple main burners 420 are provided circumferentially inside the outer cylinder 10 and inner cylinder 13, surrounding the pilot nozzle 411 from the outer circumference. The main burner 420 includes a main nozzle 421, a main burner 420 cylinder as a premixing tube, and a main swirler 423. The base end of the main nozzle 421 is connected to the main fuel port 424, and fuel F is introduced into the main nozzle 421 via the main fuel port 424.

[0077] The main burner 420 cylinder is cylindrical in shape, extending along axis O, and surrounds the main nozzle 421 from the outer circumference. As shown in Figure 16, the tip of the main burner 420 cylinder gradually decreases in diameter towards the tip, in accordance with the shape of the pilot cone 414. Each main burner 420 cylinder and pilot burner 410 cylinder are spaced apart from each other with a gap in between. Each main burner 420 cylinder is spaced apart from the inner cylinder 13 with a gap in between. The main swara 423 is located between the main nozzle 421 and the main burner 420 cylinder.

[0078] <Circuit board> As shown in Figures 16 and 17, the substrate 430 is positioned inside the inner cylinder 13 and has a disc shape extending in a direction perpendicular to the axis O. The outer peripheral surface 23 of the substrate 430 is fixed to the inner peripheral surface of the inner cylinder 13 around its entire circumference. The substrate 430 supports the pilot burner 410 and the main burner 420 inside the inner cylinder 13. The pilot burner 410 and the main burner 420 are positioned so as to penetrate the substrate 430. That is, the substrate 430 has multiple through holes, and the pilot cone 414 of the pilot burner 410 and the main burner 420 cylinder of the main burner 420 are supported through these through holes.

[0079] <Temperature detection circuit> As shown in Figure 17, the substrate 430 is provided with a temperature sensing circuit 50. In this embodiment, it is formed in a planar shape so as to be laminated on the downstream-facing surface of the substrate 430. The temperature sensing circuit 50 may also be laminated on the upstream-facing surface of the substrate 430, or it may be embedded within the substrate 430.

[0080] The temperature sensing circuit 50 is positioned to extend circumferentially between the pilot cone 414 and each main burner 420 cylinder. Each contact of the temperature sensing circuit 50 is located between the pilot cone 414 and each main burner 420 cylinder. Specifically, the contacts are arranged such that hot contacts H and cold contacts L alternate circumferentially on the outer circumference of the pilot cone 414.

[0081] Furthermore, as shown in Figure 18, for example, as a modification of the fifth embodiment, the temperature detection circuit 50 may be provided so as to surround the main burner 420 cylinder. That is, in this modification, the temperature detection circuit 50 is provided so as to extend circumferentially between the multiple main burner 420 cylinders and the inner cylinder 13. Each contact is provided between each main burner 420 cylinder and the inner cylinder 13 so as to correspond to each main burner 420 cylinder. <Effects and Effects> In the fifth embodiment, as in the other embodiments, even if a localized flashback occurs in some of the main burner 420 cylinders among the multiple main burners 420, the flashback can be appropriately detected.

[0082] <Other Embodiments> Although embodiments of the present invention have been described above, the present invention is not limited thereto and can be modified as appropriate without departing from the technical spirit of the invention.

[0083] In this embodiment, a plenum is provided within the substrate 20, and fuel F is supplied from the plenum to each nozzle 30, but the embodiment is not limited to this. For example, a fuel supply nozzle may be inserted into each nozzle 30 from the upstream side, and fuel F may be supplied to the nozzle 30 by the fuel supply nozzle.

[0084] Furthermore, in this embodiment, at least one contact point is provided around each nozzle 30, but it is not necessary for contact points to be provided around all nozzles 30. For example, a configuration in which one contact point is provided for every multiple nozzles 30 is also possible. Alternatively, contact points may be provided while skipping one or more nozzles 30 in the direction of extension of the temperature sensing circuit 50. On the other hand, multiple contact points may be provided to correspond to each nozzle 30.

[0085] In the second and third embodiments, a structure was described in which the nozzles 30 are arranged in four vertical and four horizontal rows (4 rows x 4 columns), but the structure is not limited to this. That is, the nozzles 30 can be arranged in a matrix of multiple vertical and multiple horizontal rows, or in other arrangements such as a staggered arrangement.

[0086] In this embodiment, a configuration in which the temperature sensing circuit 50 is formed on the downstream end face 22 of the substrate 20 has been described, but the configuration is not limited to this. The temperature sensing circuit 50 may also be embedded within the substrate 20. Furthermore, if the temperature response is too fast when the temperature sensing circuit 50 is formed on the downstream end face 22, it becomes difficult to distinguish between flashbacks and other events such as noise or combustion vibrations. Therefore, the temperature response may be delayed by shallowly embedding the temperature sensing circuit 50 from the downstream end face 22 or by providing a thin insulating layer on the temperature sensing circuit 50. Furthermore, the fifth embodiment may also include the computing devices 100, 200, and 300 of the other embodiments.

[0087] The processing steps performed by the aforementioned arithmetic units 100, 200, and 300 are stored in program format on a recording medium readable by the computer 500. The computer 500 reads and executes this program to perform the above processing. A specific example of the computer 500 is shown below.

[0088] As shown in Figure 19, the computer 500 includes a CPU 501, main memory 502, storage 503, and interface 504. For example, the aforementioned arithmetic units 100, 200, and 300 are implemented in the computer 500. The operation of each of the aforementioned processing units is stored in storage 503 in the form of a program. The CPU 501 reads the program from storage 503, loads it into main memory 502, and executes the above processing according to the program. The CPU 501 also allocates memory space in main memory 502 according to the program.

[0089] Examples of storage 503 include HDDs (Hard Disk Drives), SSDs (Solid State Drives), magnetic disks, magneto-optical disks, CD-ROMs (Compact Disc Read Only Memory), DVD-ROMs (Digital Versatile Disc Read Only Memory), and semiconductor memory. Storage 503 may be an internal medium directly connected to the bus of computer 500, or an external medium connected to computer 500 via interface 504 or a communication line. Furthermore, if this program is distributed to computer 500 via a communication line, computer 500 may receive the program, expand it into main memory 502, and execute the above processing. Note that storage 503 is a tangible storage medium that is not temporary.

[0090] Furthermore, the above program may implement some of the functions described above. Moreover, the above program may be a file, a so-called differential file (differential program), that can implement the functions described above in combination with a program already recorded in computer 500.

[0091] In addition to the above configuration, or in place of the above configuration, a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device), an ASIC (Application Specific Integrated Circuit), a GPU (Graphics Processing Unit), and similar processing units may be provided. Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, some or all of the functions implemented by the processor may be implemented by the integrated circuit.

[0092] <Note> The combustors 3a, 400, combustor system 3, and gas turbine 1 described in each embodiment can be understood, for example, as follows.

[0093] (1) The combustors 3a and 400 according to the first embodiment further include substrates 20 and 430 extending in a direction perpendicular to the axis O, a plurality of premixing pipes 30 and 422 extending through the substrates 20 and 430 and injecting a premixed gas M generated by mixing fuel F with air A introduced from the upstream side from an opening on the downstream side, and a temperature sensing circuit 50 provided on the substrates 20 and 430 and extending in a direction perpendicular to the axis O so as to pass around each of the premixing pipes 30 and 422, wherein the temperature sensing circuit 50 has a starting point S and an ending point E which become the output terminals 70 of the temperature sensing circuit 50, and has a plurality of contacts formed by alternately connecting a plurality of positive element wires 51 and a plurality of negative element wires 52 from the starting point S side to the ending point E side.

[0094] According to the above configuration, when a flashback occurs in any of the premixing tubes 30 or 422, and the temperature of that premixing tube 30 or 422 rises, the temperature of the contacts near that premixing tube 30 or 422 also rises. This generates an electromotive force in the temperature detection circuit 50. By detecting this electromotive force from the output terminal 70 of the temperature detection circuit 50, it is possible to detect that a flashback has occurred in any of the premixing tubes 30 or 422.

[0095] (2) In the combustors 3a and 400 according to the second embodiment, the contacts are arranged around each of the premixing tubes 30 and 422, at least one of them, as in the combustor 3a described in (1).

[0096] This allows for the detection of abnormal temperature increases in each premixing tube 30 and 422, and enables the detection of a flashback.

[0097] (3) The combustors 3a, 400 according to the third embodiment are the combustors 3a, 400 according to (1) or (2), wherein the temperature sensing circuit 50 is formed on the downstream surface of the substrates 20, 430.

[0098] This allows for the direct detection of a temperature rise at the contact point without the need for other heat transfer layers when a flashback occurs.

[0099] (4) The combustors 3a, 400 according to the fourth embodiment are the combustors 3a, 400 according to (3) wherein the temperature sensing circuit 50 has a heat-shielding coating layer formed on the surface of the temperature sensing circuit 50.

[0100] This allows for sensitivity adjustment so that abnormal temperatures are detected only when flames flash back.

[0101] (5) The combustor 3a, 400 according to the fifth embodiment is a combustor 3a according to any of (1) to (4), wherein the contacts include a hot contact H formed by connecting the positive wire 51 and the negative wire 52 in that order from the starting point S side to the ending point E side of the temperature sensing circuit 50, and a cold contact L formed by connecting the negative wire 52 and the positive wire 51 in that order from the starting point S side to the ending point E side of the temperature sensing circuit 50, and a pair of the contacts are arranged opposite each other so as to sandwich the premixing tubes 30, 422, and each pair of the contacts is either a hot contact H or a cold contact L.

[0102] Here, the hot junction H generates a positive electromotive force due to the temperature rise, and the cold junction L generates a negative electromotive force due to the temperature rise. Therefore, for example, if the hot junction H and the cold junction L are arranged opposite each other with a specific premixing tube 30, 422 in between, the electromotive forces generated at the hot junction H and the cold junction L will cancel each other out due to the temperature rise of the premixing tubes 30, 422. In contrast, in this embodiment, a pair of hot junctions H or a pair of cold junctions L are arranged opposite each other with a premixing tube 30, 422 in between, so their electromotive forces do not cancel each other out. Therefore, abnormal temperature rises can be appropriately detected.

[0103] (6) The combustors 3a, 400 according to the sixth embodiment are combustors 3a according to any one of (1) to (5), wherein the temperature sensing circuit 50 has an intermediate point I between the starting point S and the ending point E that serves as an output terminal 70.

[0104] By detecting not only the voltage value between the starting point S and the ending point E, but also the electromotive force between the starting point S and the intermediate point I, between the intermediate point I and the ending point E, and between the intermediate points I and I, it is possible to detect in which region a flashback occurred.

[0105] (7) The combustor 3a, 400 according to the seventh embodiment is the combustor 3a according to any one of (1) to (6), wherein the substrate 20 has a plurality of premixing tube 30, 422 segments in which a plurality of the premixing tubes 30, 422 are arranged together, and the temperature sensing circuit 50 is provided for each of the plurality of premixing tube 30, 422 segments.

[0106] This makes it possible to detect whether or not a flashback occurred for each of the 422 segments of the premixing tube 30.

[0107] (8) The combustor system 3 according to the eighth embodiment comprises a combustor 3a, 400 as described in any of (1) to (5), and a calculation device 100 that detects flashback based on the voltage value output from the output terminal 70.

[0108] By obtaining voltage values ​​from the temperature anomaly circuit, flashbacks can be detected with high accuracy.

[0109] (9) The combustor system 3 according to the ninth embodiment comprises the combustors 3a and 400 described in (6), and a calculation device 200 that calculates which region among the plurality of output terminals 70 a flashback occurred in based on the voltage values ​​output from each of the plurality of output terminals 70.

[0110] By acquiring voltage values ​​between multiple output terminals 70, it is possible to accurately detect in which region of the output terminals 70 a flashback occurred.

[0111] (10) The combustor system 3 according to the tenth embodiment comprises the combustors 3a and 400 described in (7), and a calculation device 300 that identifies the premixing tube 30 and 422 segments where a flashback occurred based on the voltage value output from the output terminal 70 of each of the temperature sensing circuits 50.

[0112] This makes it possible to appropriately detect which of the multiple premixing tubes 30 and 422 segments caused the flashback.

[0113] (11) The combustor system 3 according to the eleventh embodiment further comprises a fuel supply unit 90 capable of adjusting the amount of fuel F supplied to each of the premixing tubes 30, 422 segments, wherein the calculation unit 300 reduces the amount of fuel F supplied to the premixing tubes 30, 422 segments in which the flashback has been identified, and increases the amount of fuel F supplied to the other premixing tubes 30, 422 segments, as described in (10).

[0114] This allows the overall output of the combustors 3a and 400 to be maintained while suppressing burnout of the premixing tubes 30 and 422 segments where flashback occurs.

[0115] (12) A gas turbine 1 according to the twelfth embodiment comprises a combustor system 3 according to any one of (8) to (11) into which air A is introduced and combustion gas C is generated, a compressor 2 that supplies compressed air A to the combustor system 3, and a turbine 4 driven by the combustion gas C. [Explanation of Symbols]

[0116] 1 Gas Turbine 2 Compressor 3 Combustor System 3a Combustor 4 Turbines 10 Outer cylinder 11 End cover 13 Inner cylinder 15 Support part 20 circuit boards 21 Upstream end face 22 Downstream end face 23 Outer surface 30 nozzles (premixing tubes) 40 nozzle segments 50 Temperature detection circuit 51. Positive Element Line 52 Negative Element Line 70 Output terminals 71 First output terminal 72 Second output terminal 73 Third output terminal 74 Fourth output terminal 80 Standard Thermocouple 90 Fuel supply section 91 Fuel supply line 92 Control valve 100 Computing equipment 110 Voltage acquisition unit 120 Judgment section 200 Computing equipment 210 Voltage acquisition unit 220 Judgment section 230 Area identification part 300 Arithmetic equipment 310 Voltage acquisition unit 320 Judgment section 330 Fuel Control Unit 400 Combustor 410 Pilot Burner 411 Pilot Nozzle 412 Pilot burner tube 413 Cylindrical section 414 Pilot Cone 415 Pilot Swara 416 Pilot Fuel Port 420 Main Burner 421 Main Nozzle 422 Main burner tube (premixing tube) 423 Main Swara 424 Main Fuel Port 430 circuit boards 500 Computers 501 CPU 502 Main Memory 503 Storage 504 Interface O axis A air F fuel M Premixed Gas C Combustion gas S Starting point E Terminal I intermediate point H hot junction L cold junction

Claims

1. A substrate extending in a direction perpendicular to the combustor axis, Multiple premixing tubes extend through the substrate and inject a premixed gas, generated by mixing fuel with air introduced from the upstream side, from an opening on the downstream side. The substrate is further provided with a temperature sensing circuit that extends in a direction perpendicular to the combustor axis so as to pass around each of the premixing tubes, The aforementioned temperature sensing circuit has a starting point and an ending point that serve as the output terminals of the temperature sensing circuit, and a combustor having multiple contacts formed by the alternating connection of multiple positive and negative wires from the starting point side to the ending point side.

2. The combustor according to claim 1, wherein at least one of the contacts is arranged around each of the premixing tubes.

3. The combustor according to claim 1, wherein the temperature sensing circuit is formed along the surface of the downstream-facing surface of the substrate.

4. The combustion device according to claim 3, wherein the temperature sensing circuit has a heat-shielding coating layer formed on the surface of the temperature sensing circuit.

5. The aforementioned contact is A temperature junction is formed by connecting the positive element wire and the negative element wire in that order from the starting point to the ending point of the temperature sensing circuit, A cold junction is formed by connecting the negative element wire and the positive element wire in that order from the starting point to the ending point of the temperature sensing circuit, Includes, The aforementioned contacts are arranged in pairs facing each other so as to sandwich the premixing tube. The combustor according to claim 1, wherein both of the pair of contacts are either hot contacts or cold contacts.

6. The combustor according to claim 1, wherein the temperature sensing circuit has an intermediate point that serves as an output terminal between the starting point and the ending point.

7. The nozzle has multiple nozzle segments, each consisting of multiple premixing tubes arranged in a group. The combustor according to claim 1, wherein the temperature sensing circuit is provided for each of the plurality of nozzle segments.

8. The combustor according to claim 1, A combustor system equipped with a calculation device that detects flashback based on the voltage value output from the aforementioned output terminal.

9. The combustor according to claim 6, A calculation device that calculates whether a flashback has occurred in any region between the multiple output terminals based on the voltage values ​​output from the multiple output terminals, A combustion system equipped with a combustion chamber.

10. The combustor according to claim 7, A calculation device that identifies the nozzle segment where a flashback occurred based on the voltage value output from the output terminal of each temperature sensing circuit, A combustion system equipped with a combustion chamber.

11. A fuel supply unit capable of adjusting the amount of fuel supplied to each nozzle segment is further provided. The aforementioned computing device is The combustor system according to claim 10, which reduces the amount of fuel supplied to the nozzle segment in which the flashback was identified as having occurred, and increases the amount of fuel supplied to the other nozzle segments.

12. A combustor system according to any one of claims 8 to 11, wherein air is introduced to generate combustion gases, A compressor that supplies the compressed air to the combustor system, A turbine driven by the aforementioned combustion gas, A gas turbine equipped with a gas turbine.

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