Nozzle and micro-mixing tube manufacturing method suitable for pure hydrogen gas turbine

Abstract

The embodiments of the present disclosure disclose a nozzle and a micro-mixing tube manufacturing method suitable for a pure hydrogen gas turbine. A specific implementation of the nozzle includes: a first panel, a second panel, a side panel, at least one fuel pipe and at least one micro-mixing tube, wherein the micro-mixing tube includes a micro-mixing tube body and at least one fuel hole, the diameter of the micro-mixing tube body is 3 to 5 mm, and each fuel hole is arranged on the side of the corresponding micro-mixing tube body. The first panel, the second panel and the side panel form a fuel cavity, and each fuel pipe is arranged on the first panel, and the outlet end of each fuel pipe is connected to the fuel cavity; the inlet end of each micro-mixing tube is arranged on the first panel, which is in the fuel cavity, and at least one air inlet hole is arranged on the first panel; at least one mixed fuel outlet hole is arranged on the second panel, and each micro-mixing tube outlet end corresponds to a mixed fuel outlet hole. This implementation can reduce the risk of flashback and the emission of nitrogen oxides.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of gas turbines, and in particular to a method for manufacturing a nozzle and a micro-mixing tube suitable for a pure hydrogen gas turbine. Background Art

[0002] As a large-scale, long-cycle energy storage technology, hydrogen gas turbines have the characteristics of zero carbon emissions, fast start and stop, and strong frequency and voltage regulation support, and can play the advantages of short-term peak and deep regulation. At present, when designing the nozzle of hydrogen gas turbines, the usual method is to use a large-diameter premixing nozzle, and then determine the length of the premixing nozzle according to the forced convection heat transfer characteristics in the tube slot to improve the cooling effect.

[0003] However, the inventors have found that when the nozzle of a gas turbine is designed in the above manner, the following technical problems often occur:

[0004] First, hydrogen has low ignition energy, fast flame diffusion speed and short combustion process. When the fuel is pure hydrogen, the use of a large diameter premixing nozzle will cause a higher risk of flashback.

[0005] Second, the length of the premixing nozzle is determined only by considering the cooling effect, while the effect of the length of the premixing nozzle on the mixing uniformity of the gas and the pressure loss is not considered. When the length of the premixing nozzle is long, the pressure loss along the way is large, resulting in a higher total pressure loss in the combustion chamber, which causes lower performance of the gas turbine. When the length of the premixing nozzle is too short, the mixing uniformity of air and hydrogen is low, resulting in a higher risk of flashback in the premixing nozzle, which results in lower combustion stability in the combustion chamber.

[0006] The above information disclosed in this Background section is only for enhancement of understanding of the background of the inventive concept and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Summary of the invention

[0007] The content of this disclosure is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this disclosure is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0008] Some embodiments of the present disclosure propose a nozzle suitable for a pure hydrogen gas turbine and a method for manufacturing a micro-mixing tube suitable for a pure hydrogen gas turbine to solve one or more of the technical problems mentioned in the above background technology section.

[0009] In a first aspect, some embodiments of the present disclosure provide a nozzle suitable for a pure hydrogen gas turbine, the nozzle comprising: a first panel, a second panel, a side panel, at least one fuel pipe and at least one micro-mixing tube, wherein the micro-mixing tube in the at least one micro-mixing tube comprises a micro-mixing tube body and at least one fuel hole, the diameter of the micro-mixing tube body included in the micro-mixing tube is 3 to 5 mm, each micro-mixing tube body comprises an inlet end and an outlet end, the fuel holes included in the micro-mixing tube are arranged on the side of the corresponding micro-mixing tube body, and the center points of the fuel holes included in the micro-mixing tube are located on the same horizontal plane, and the first panel, the second panel and the side panel are A fuel cavity is formed, each of the at least one fuel tube is arranged on the first panel, and the outlet end of each fuel tube is connected to the fuel cavity; the inlet end of each micro-mixing tube is arranged on the first panel and is in the fuel cavity, at least one air inlet hole is arranged on the first panel, and the inlet end of each micro-mixing tube corresponds to an air inlet hole, and the inlet end of each micro-mixing tube is connected to the corresponding air inlet hole; at least one mixed fuel outlet hole is arranged on the second panel, and the outlet end of each micro-mixing tube corresponds to a mixed fuel outlet hole, and the outlet end of each micro-mixing tube is connected to the corresponding mixed fuel outlet hole.

[0010] Optionally, the angle between the long axis of each fuel hole included in the micro-mixing tube and the central axis of the corresponding micro-mixing tube body is in the range of 15 degrees to 60 degrees; the length of the micro-mixing tube body included in the micro-mixing tube is 51 to 85 mm; the diameter of each fuel hole is 0.4 to 0.7 mm, and the distance between the center point of the fuel hole and the corresponding cross-section of the outlet end of the micro-mixing tube body is 45 to 75 mm.

[0011] Optionally, the outer side surface of the outlet end of the micro-mixing tube is provided with at least one heat dissipation fin.

[0012] Optionally, the inlet end of each micro-mixing tube is provided with a chamfer.

[0013] In a second aspect, some embodiments of the present disclosure provide a method for manufacturing a micro-mixing tube suitable for a pure hydrogen gas turbine, which is applied to a micro-mixing tube included in a nozzle as described in any implementation method of the first aspect above, and the method includes: determining the combustion chamber operating temperature information and the combustion chamber operating pressure information of the target pure hydrogen gas turbine; generating micro-mixing tube diameter range information based on the above combustion chamber operating temperature information and the above combustion chamber operating pressure information; determining initial pipe diameter information and initial pipe size ratio information based on the above micro-mixing tube diameter range information and preset micro-mixing tube size ratio range information; performing the following determination steps based on the initial pipe diameter information and the initial pipe size ratio information: constructing a micro-mixing tube structure model based on the initial pipe diameter information and the initial pipe size ratio information; and generating a micro-mixing tube diameter range information based on the preset fluid simulation information. The invention relates to a method for manufacturing a micro-mixing tube according to a plurality of micro-mixing tubes, wherein the micro-mixing tube structure model is simulated and processed to obtain simulation result information; according to the simulation result information and the combustion chamber operating pressure information, pressure loss information and mixing unevenness information are generated; in response to determining that the pressure loss information and the mixing unevenness information meet the preset verification conditions, the initial pipeline diameter information is determined as the micro-mixing tube diameter information, and the initial pipeline size ratio information is determined as the micro-mixing tube size ratio information; according to the micro-mixing tube diameter information and the micro-mixing tube size ratio information, micro-mixing tube length information is generated; according to the micro-mixing tube diameter information and the micro-mixing tube length information, fuel hole information is generated; and the associated micro-mixing tube manufacturing device is controlled to perform the micro-mixing tube manufacturing operation according to the micro-mixing tube diameter information, the micro-mixing tube length information and the fuel hole information.

[0014] The above-mentioned various embodiments of the present disclosure have the following beneficial effects: through the nozzles suitable for pure hydrogen gas turbines of some embodiments of the present disclosure, the risk of flashback and the emission of nitrogen oxides can be reduced. Specifically, the reasons for the high risk of flashback are: the ignition energy of hydrogen is low, the flame diffusion speed is fast, and the combustion process is short. When the fuel is pure hydrogen, the use of a large-diameter premixing nozzle causes a high risk of flashback. Based on this, some embodiments of the present disclosure are nozzles suitable for pure hydrogen gas turbines, and the above-mentioned nozzles include: a first panel, a second panel, a side panel, at least one fuel pipe and at least one micro-mixing tube, wherein the micro-mixing tube in the at least one micro-mixing tube includes a micro-mixing tube body and at least one fuel hole, the diameter of the micro-mixing tube body included in the micro-mixing tube is 3 to 5 mm, each micro-mixing tube body includes an inlet end and an outlet end, and the various fuel holes included in the micro-mixing tube are arranged on the side of the corresponding micro-mixing tube body, and the center points of the various fuel holes included in the micro-mixing tube are located on the same horizontal plane, and the above-mentioned first panel, the above-mentioned second panel and the above-mentioned side panel form The fuel cavity, each of the at least one fuel pipe is arranged on the first panel, and the outlet end of each fuel pipe is connected to the fuel cavity; the inlet end of each micro-mixing tube is arranged on the first panel, and is in the fuel cavity; the first panel is provided with at least one air inlet hole, and the inlet end of each micro-mixing tube corresponds to an air inlet hole, and the inlet end of each micro-mixing tube is connected to the corresponding air inlet hole; the second panel is provided with at least one mixed fuel outlet hole, and the outlet end of each micro-mixing tube corresponds to a mixed fuel outlet hole, and the outlet end of each micro-mixing tube is connected to the corresponding mixed fuel outlet hole. Because the nozzle suitable for pure hydrogen gas turbine premixes air and hydrogen uniformly through each micro-mixing tube with a smaller diameter, and then injects the mixed fuel gas into the combustion chamber through the mixed fuel outlet hole, instead of directly injecting the premixing nozzle with a large diameter into the combustion chamber, the speed of the fuel gas at the fuel outlet hole is increased, thereby reducing the risk of flashback. Also, because the mixed gas evenly mixed in the micro-mixing tube is taken into the combustion chamber, the space in the micro-mixing tube is small, which improves the mixing uniformity of the mixed gas, thereby reducing the emission of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that components and elements are not necessarily drawn to scale.

[0016] Figure 1 It is a schematic diagram of the structure of some embodiments of the nozzle applicable to a pure hydrogen gas turbine disclosed in the present invention;

[0017] Figure 2is a schematic cross-sectional structure diagram of some embodiments of the nozzles of the present disclosure applicable to pure hydrogen gas turbines;

[0018] Figure 3 It is a schematic structural diagram of some embodiments of the micro-mixing tube included in the nozzle applicable to the pure hydrogen gas turbine disclosed in the present invention;

[0019] Figure 4 It is a schematic structural diagram of other embodiments of the micro-mixing tube included in the nozzle applicable to the pure hydrogen gas turbine disclosed in the present invention;

[0020] Figure 5 The present invention is a flow chart of some embodiments of a method for manufacturing a micro-mixing tube suitable for a pure hydrogen gas turbine according to the present invention. DETAILED DESCRIPTION

[0021] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0022] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0023] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0024] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0025] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0026] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] Figure 1 It is a schematic diagram of the structure of some embodiments of the nozzle applicable to a pure hydrogen gas turbine disclosed in the present invention. Figure 1 It includes a second panel 2, a side panel 3, a fuel pipe 4 and a mixed fuel outlet hole 7.

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of some embodiments of the nozzle applicable to a pure hydrogen gas turbine disclosed in the present invention. Figure 2 It includes a first panel 1 , a second panel 2 , a side panel 3 , a fuel pipe 4 , a micro-mixing pipe 5 , a fuel hole 52 and a fuel cavity 6 .

[0029] Figure 3 It is a schematic structural diagram of some embodiments of the micro-mixing tube included in the nozzle applicable to a pure hydrogen gas turbine disclosed in the present invention. Figure 3 It includes a micro-mixing tube body 51 and a fuel hole 52 .

[0030] Figure 4 It is a schematic structural diagram of other embodiments of the micro-mixing tube included in the nozzle applicable to a pure hydrogen gas turbine disclosed in the present invention. Figure 4 It includes a micro-mixing tube body 51 , a fuel hole 52 and heat dissipation fins 53 .

[0031] In some embodiments, Figure 2 As shown, the nozzle includes: a first panel 1, a second panel 2, a side panel 3, at least one fuel pipe 4 and at least one micro-mixing tube 5. The first panel 1 and the second panel 2 have the same size and shape. There is no limitation on the shape of the first panel 1 and the second panel 2. For example, the first panel 1 and the second panel 2 are circular in shape. The fuel pipe 4 can be a pipe for fuel circulation. The fuel can be hydrogen. The micro-mixing tube 5 in the at least one micro-mixing tube 5 includes: a micro-mixing tube body 51 and at least one fuel hole 52, such as Figure 3 As shown. The micro-mixing tube 5 can be a pipe for mixing air and hydrogen. The material of the micro-mixing tube 5 can be a nickel-based high-temperature alloy. For example, the material of the micro-mixing tube 5 can be GH3536. The above-mentioned fuel hole can be a hole for fuel to flow in. The diameter of the micro-mixing tube 5 body included in the micro-mixing tube 5 can be 3 to 5 mm. Each micro-mixing tube body 51 can include an inlet end and an outlet end. Among them, the above-mentioned inlet end can be the end where the air enters the micro-mixing tube body 51. The above-mentioned outlet end can be the end where the mixed gas flows out of the micro-mixing tube body 51. As shown Figure 2As shown, the inlet end may be the end where the first panel 1 is located, and the outlet end may be the end where the second panel 2 is located. The mixed gas may be a gas mixed with air and hydrogen. The fuel holes 52 included in the micro-mixing tube 5 may be arranged on the side of the corresponding micro-mixing tube body 51. The number of fuel holes 52 included in each micro-mixing tube 5 may not be limited. For example, each micro-mixing tube 5 may include 2 fuel holes 52, or 3 fuel holes 52. The ratio of the sum of the areas of the fuel holes 52 to the cross-sectional area of ​​the micro-mixing tube body 51 is a preset ratio. The preset ratio may be a pre-set ratio, so that the total flow rate of the fuel entering from the fuel hole and the flow rate of the air entering from the inlet end of the micro-mixing tube may present a fixed ratio. The center points of the fuel holes 52 included in the micro-mixing tube 5 may be located on the same horizontal plane.

[0032] In some embodiments, the first panel 1, the second panel 2 and the side panel 3 may form a fuel cavity 6. Figure 1 As shown, when the first panel 1 and the second panel 2 are both circular, the first panel 1, the second panel 2 and the side panel 3 can form a cylindrical fuel cavity. The fuel cavity 6 can be a cavity for accommodating the fuel. Each of the at least one fuel pipe 4 can be fixedly arranged on the outer side of the first panel 1. The outer side surface can be the side opposite to the inner side surface. The inner side surface can be the side in the fuel cavity 6. There is no limitation on the number of each fuel pipe 4. For example, the number of each fuel pipe 4 can be 3. The outlet end of each fuel pipe 4 can be connected to the fuel cavity 6. The outlet end of the fuel pipe 4 can be an end where the fuel flows out of the fuel pipe 4. Thus, the fuel can flow from the fuel pipe into the fuel cavity.

[0033] In some embodiments, the inlet end of each micro-mixing tube 5 can be fixedly disposed on the inner side surface of the first panel 1 and located in the fuel cavity 6. The micro-mixing tubes 5 can be evenly distributed on the first panel 1. At least one air inlet hole can be provided on the first panel 1. The air inlet hole can be a hole for allowing air to flow into the micro-mixing tube 5. There is an air inlet hole corresponding to the inlet end of each micro-mixing tube 5. The size of the air inlet hole can be the same as the size of the inner diameter of the micro-mixing tube 5. The inlet end of each micro-mixing tube 5 is connected to the corresponding air inlet hole. Thus, air can flow into the micro-mixing tube from the inlet end of the micro-mixing tube, and fuel can flow into the micro-mixing tube from the fuel cavity through each fuel hole, thereby achieving mixing of air and fuel.

[0034] In some embodiments, at least one mixed fuel outlet hole 7 may be provided on the second panel 2. The mixed fuel outlet hole 7 may be a hole for allowing the mixed gas to flow out of the micro-mixing tube 5. Each outlet end of each micro-mixing tube 5 corresponds to a mixed fuel outlet hole 7. The size of the mixed fuel outlet hole 7 may be the same as the size of the inner diameter of the micro-mixing tube 5. The outlet end of each micro-mixing tube 5 is connected to the corresponding mixed fuel outlet hole 7. Thus, the mixed gas can flow out from the outlet section of the micro-mixing tube.

[0035] Optionally, the angle between the long axis of each fuel hole 52 included in the micro-mixing tube 5 and the central axis of the corresponding micro-mixing tube body 51 can be in the range of 15 degrees to 60 degrees. The length of the micro-mixing tube body 51 included in the micro-mixing tube 5 can be 51 to 85 mm. The diameter of each fuel hole 52 can be 0.4 to 0.7 mm. The vertical distance between the center point of the fuel hole 52 and the corresponding cross-section of the outlet end of the micro-mixing tube body 51 can be 45 to 75 mm. The above-mentioned outlet end cross-section can be the cross-section of the outlet end of the micro-mixing tube body 51. In this way, the risk of flashback can be reduced while improving the uniformity of the mixed gas.

[0036] Optionally, the outer side surface of the outlet end of the micro-mixing tube 5 may be provided with at least one heat dissipation fin 53, such as Figure 4 As shown. The heat dissipation fins 53 can be fins for dissipating heat. There is no limit on the number of heat dissipation fins 53 provided. Thus, the heat dissipation effect of the micro-mixing tube can be improved, thereby reducing the risk of flashback.

[0037] Optionally, a chamfer is provided at the inlet end of each micro-mixing tube 5. Thus, the pressure loss value between the inlet end and the outlet end of the micro-mixing tube can be reduced, thereby improving the performance of the gas turbine.

[0038] Optionally, the nozzle may be manufactured in one piece through 3D printing.

[0039] The above-mentioned various embodiments of the present disclosure have the following beneficial effects: through the nozzles suitable for pure hydrogen gas turbines of some embodiments of the present disclosure, the risk of flashback and the emission of nitrogen oxides can be reduced. Specifically, the reasons for the high risk of flashback are: the ignition energy of hydrogen is low, the flame diffusion speed is fast, and the combustion process is short. When the fuel is pure hydrogen, the use of a large-diameter premixing nozzle causes a high risk of flashback. Based on this, some embodiments of the present disclosure are nozzles suitable for pure hydrogen gas turbines, and the above-mentioned nozzles include: a first panel, a second panel, a side panel, at least one fuel pipe and at least one micro-mixing tube, wherein the micro-mixing tube in the at least one micro-mixing tube includes a micro-mixing tube body and at least one fuel hole, the diameter of the micro-mixing tube body included in the micro-mixing tube is 3 to 5 mm, each micro-mixing tube body includes an inlet end and an outlet end, and the various fuel holes included in the micro-mixing tube are arranged on the side of the corresponding micro-mixing tube body, and the center points of the various fuel holes included in the micro-mixing tube are located on the same horizontal plane, and the above-mentioned first panel, the above-mentioned second panel and the above-mentioned side panel form The fuel cavity, each of the at least one fuel pipe is arranged on the first panel, and the outlet end of each fuel pipe is connected to the fuel cavity; the inlet end of each micro-mixing tube is arranged on the first panel, and is in the fuel cavity; the first panel is provided with at least one air inlet hole, and the inlet end of each micro-mixing tube corresponds to an air inlet hole, and the inlet end of each micro-mixing tube is connected to the corresponding air inlet hole; the second panel is provided with at least one mixed fuel outlet hole, and the outlet end of each micro-mixing tube corresponds to a mixed fuel outlet hole, and the outlet end of each micro-mixing tube is connected to the corresponding mixed fuel outlet hole. Because the nozzle suitable for pure hydrogen gas turbine premixes air and hydrogen uniformly through each micro-mixing tube with a smaller diameter, and then injects the mixed fuel gas into the combustion chamber through the mixed fuel outlet hole, instead of directly injecting the premixing nozzle with a large diameter into the combustion chamber, the speed of the fuel gas at the fuel outlet hole is increased, thereby reducing the risk of flashback. Also, because the mixed gas evenly mixed in the micro-mixing tube is taken into the combustion chamber, the space in the micro-mixing tube is small, which improves the mixing uniformity of the mixed gas, thereby reducing the emission of nitrogen oxides.

[0040] Continue to refer Figure 5 , shows a process 500 of some embodiments of a micro-mixing tube manufacturing method applicable to a pure hydrogen gas turbine according to the present disclosure. The micro-mixing tube manufacturing method applicable to a pure hydrogen gas turbine is applied to Figure 1 The nozzle shown includes a micro-mixing tube, comprising the following steps:

[0041] Step 501, determining the combustion chamber operating temperature information and the combustion chamber operating pressure information of the target pure hydrogen gas turbine.

[0042] In some embodiments, the execution subject (e.g., a computing device) of the micro-mixing tube manufacturing method for a pure hydrogen gas turbine can determine the combustion chamber operating temperature information and combustion chamber operating pressure information of the target pure hydrogen gas turbine. Among them, the combustion chamber operating temperature information can characterize the temperature of the combustion chamber of the target pure hydrogen gas turbine when it is running. The target pure hydrogen gas turbine can be a pure hydrogen gas turbine waiting to manufacture a matching micro-mixing tube. The pure hydrogen gas turbine can be a gas turbine whose fuel only includes hydrogen. The combustion chamber operating temperature information can include but is not limited to the combustion chamber operating temperature. The combustion chamber operating temperature can be the temperature of the combustion chamber of the corresponding pure hydrogen gas turbine when it is running. The combustion chamber operating pressure information can characterize the pressure of the combustion chamber of the corresponding pure hydrogen gas turbine when it is running. The combustion chamber operating pressure information can include but is not limited to the combustion chamber operating pressure. The combustion chamber operating pressure can be the pressure of the combustion chamber of the corresponding pure hydrogen gas turbine when it is running. In practice, first, the execution subject can obtain the gas turbine operating power of the target pure hydrogen gas turbine from the database by wired connection or wireless connection. Among them, the gas turbine operating power can be the power of the target pure hydrogen gas turbine when it is running. It should be noted that the wireless connection method may include but is not limited to 3G / 4G connection, WiFi connection, Bluetooth connection, WiMAX connection, Zigbee connection, UWB (ultra wideband) connection, and other wireless connection methods currently known or to be developed in the future. Then, the preset combustion chamber operating temperature information corresponding to the above-mentioned gas turbine operating power in the preset combustion chamber operating temperature information set is determined as the combustion chamber operating temperature information, and the preset combustion chamber operating pressure information corresponding to the above-mentioned gas turbine operating power in the preset combustion chamber operating pressure information set is determined as the combustion chamber operating pressure information. Among them, the preset combustion chamber operating temperature information in the preset combustion chamber operating temperature information set corresponds to the preset gas turbine operating power. The preset gas turbine operating power may be a preset gas turbine operating power. The preset combustion chamber operating temperature information may be a preset combustion chamber operating temperature information corresponding to the preset gas turbine operating power. The preset combustion chamber operating pressure information in the preset combustion chamber operating pressure information set corresponds to the preset gas turbine operating power. The preset combustion chamber operating pressure information may be a preset combustion chamber operating pressure information corresponding to the preset gas turbine operating power.

[0043] Step 502: Generate micro-mixing tube diameter range information according to the combustion chamber operating temperature information and the combustion chamber operating pressure information.

[0044] In some embodiments, the above-mentioned execution body can generate the micro-mixing tube diameter range information according to the above-mentioned combustion chamber operating temperature information and the above-mentioned combustion chamber operating pressure information. Among them, the above-mentioned micro-mixing tube diameter range information can characterize the range of the micro-mixing tube diameter. It should be noted that the micro-mixing tube diameter here is the outer diameter of the micro-mixing tube body. The above-mentioned micro-mixing tube size ratio range information can characterize the range of the micro-mixing tube size ratio. The above-mentioned micro-mixing tube size ratio can be the ratio of the length of the micro-mixing tube to the diameter. In practice, the above-mentioned execution body can generate the micro-mixing tube diameter range information according to the above-mentioned combustion chamber operating temperature information and the above-mentioned combustion chamber operating pressure information in various ways.

[0045] In some optional implementations of some embodiments, the execution subject may generate the micro-mixing tube diameter range information according to the combustion chamber operating temperature information and the combustion chamber operating pressure information through the following steps:

[0046] The first step is to generate the micro-mixing tube gas viscosity information according to the combustion chamber operating temperature information. In practice, the execution subject can input the combustion chamber operating temperature included in the combustion chamber operating temperature information into the Sutherland formula to obtain the micro-mixing tube gas viscosity information. The Sutherland formula can be expressed by the following formula:

[0047]

[0048] Wherein, μ may represent the viscosity of the mixed gas in the micro-mixing tube of the target pure hydrogen gas turbine in the working state, that is, the micro-mixing tube gas viscosity information. μ0 may represent the viscosity value of the air at a temperature of 273.15 Kelvin. T may represent the above combustion chamber operating temperature information. C may represent a preset temperature value. The above preset temperature value may be 110.4 Kelvin.

[0049] The second step is to generate the micro-mixing tube gas density information according to the combustion chamber operating pressure information and the combustion chamber operating temperature information. The micro-mixing tube gas density information may be the density of the mixed gas in the micro-mixing tube. In practice, the execution subject may input the combustion chamber operating pressure included in the combustion chamber operating pressure information and the combustion chamber operating temperature included in the combustion chamber operating temperature information into the gas state equation to obtain the micro-mixing tube gas density information. The gas state equation may be expressed by the following formula:

[0050] PM=ρRT.

[0051] Wherein, P may represent the above combustion chamber operating pressure information. M may represent the relative molecular mass of air. ρ may represent the micro-mixing tube gas density information. R may represent the gas constant. T may represent the above combustion chamber operating temperature information.

[0052] The third step is to generate gas kinematic viscosity information according to the micro-mixing tube gas viscosity information and the micro-mixing tube gas density information. The gas kinematic viscosity information may be the kinematic viscosity of the mixed gas in the micro-mixing tube. In practice, the execution entity may determine the ratio of the micro-mixing tube gas viscosity information to the micro-mixing tube gas density information as the gas kinematic viscosity information.

[0053] The fourth step is to generate the micro-mixing tube diameter range information according to the above-mentioned gas kinematic viscosity information and the preset gas average velocity. The above-mentioned preset gas average velocity can be the average value of each speed corresponding to each point of the cross section of the micro-mixing tube body of the preset mixed gas. The above-mentioned micro-mixing tube diameter range information can characterize the range of the micro-mixing tube diameter. In practice, the above-mentioned execution body can generate the micro-mixing tube diameter range information according to the above-mentioned gas kinematic viscosity information and the preset gas average velocity in various ways.

[0054] In some optional implementations of some embodiments, the execution subject may generate the micro-mixing tube diameter range information according to the gas kinematic viscosity information and the preset gas average velocity through the following steps:

[0055] The first step is to generate the first micro-mixing tube diameter range information according to the above-mentioned gas kinematic viscosity information, the preset gas average velocity and the preset Reynolds number range. The above-mentioned preset Reynolds number range can be a Reynolds number range pre-set according to the characteristics of convective heat transfer in the tube groove. The above-mentioned preset Reynolds number range can be (10 4 , +∞). In practice, the above-mentioned execution subject can input the above-mentioned gas kinematic viscosity information, the preset gas average velocity and the preset Reynolds number range into the preset pipeline diameter function to obtain the first micro-mixing tube diameter range information. Among them, the above-mentioned preset pipeline diameter function can be expressed by the following formula:

[0056]

[0057] Where d can represent the diameter of the micro-mixing tube. u can represent the kinematic viscosity of the gas. e It can represent the Reynolds number. m It can represent the preset average gas velocity. v can represent the velocity.

[0058] The second step is to determine the micro-mixing tube diameter range information according to the first micro-mixing tube diameter range information. In practice, the execution subject may determine the first micro-mixing tube diameter range information as the micro-mixing tube diameter range information.

[0059] In the process of adopting technical solutions to solve the technical problems in the background technology, the following technical problems are often accompanied: when designing the diameter of the micro-mixing tube, if only the tempering and cooling problems are considered, the diameter of the micro-mixing tube is very small, resulting in a large total pressure loss value, thereby leading to a waste of energy resources. In response to the above-mentioned technical problem 2, the conventional solution is generally: through a preset flow coefficient, the diameter of the micro-mixing tube is determined according to the flow formula and the Bernoulli equation. However, the above-mentioned conventional solution still has the following problems: the manufacturing process is different, the roughness inside the micro-mixing tube is different, and the flow coefficient is also different. The use of a fixed flow coefficient to determine the diameter of the micro-mixing tube results in a low accuracy of the obtained micro-mixing tube diameter. When the diameter of the micro-mixing tube is too small, the total pressure loss value is large, resulting in low performance of the gas turbine.

[0060] In the face of the above technical problem "When designing the diameter of the micro-mixing tube, if only the tempering and cooling problems are considered, the diameter of the micro-mixing tube will be very small, resulting in a large total pressure loss value, which will lead to lower performance of the gas turbine", it was decided to adopt the following solution.

[0061] In some optional implementations of some embodiments, the execution subject may determine the micro-mixing tube diameter range information according to the first micro-mixing tube diameter range information through the following steps:

[0062] The first step is to obtain the micro-mixing tube mixed gas flow information. The micro-mixing tube mixed gas flow information may include but is not limited to the micro-mixing tube mixed gas flow. The micro-mixing tube mixed gas flow may be the flow of the mixed gas in the micro-mixing tube. In practice, the execution subject may obtain the micro-mixing tube mixed gas flow information from the database through a wired connection or a wireless connection.

[0063] The second step is to obtain the micro-mixed tube manufacturing process type. The micro-mixed tube manufacturing process type can characterize the process method used to manufacture the micro-mixed tube. The micro-mixed tube manufacturing process type can be, but is not limited to, one of the following: three-dimensional printing, machining. In practice, the execution entity can obtain the micro-mixed tube manufacturing process type from the database through a wired connection or a wireless connection.

[0064] In the third step, the preset micro-mixing tube roughness corresponding to the micro-mixing tube manufacturing process type in the preset micro-mixing tube roughness set is determined as the micro-mixing tube roughness. Among them, the preset micro-mixing tube roughness in the preset micro-mixing tube roughness set corresponds to a preset micro-mixing tube manufacturing process type. The preset micro-mixing tube manufacturing process type can be a preset micro-mixing tube manufacturing process type. The preset micro-mixing tube roughness can be a preset roughness of the inner side of the micro-mixing tube.

[0065] In the fourth step, the roughness of the micro-mixing tube and the preset micro-mixing tube size ratio range information are input into the first flow coefficient generation model obtained by pre-training to obtain the first flow coefficient. The preset micro-mixing tube size ratio range information may be a micro-mixing tube size ratio range pre-set according to the characteristics of convective heat transfer in the tube groove. For example, the micro-mixing tube size ratio range may be [10, 45]. The first flow coefficient generation model may be a linear function with the micro-mixing tube roughness and the micro-mixing tube size ratio range information as input and the first flow coefficient as output. The first flow coefficient may be the flow coefficient of the micro-mixing tube corrected by the influence of the micro-mixing tube roughness.

[0066] The fifth step is to generate a first corrected micro-mixing tube outlet flow rate range according to the preset micro-mixing tube outlet flow rate range and the above-mentioned first flow coefficient. Among them, the above-mentioned preset micro-mixing tube outlet flow rate range can be a preset range of initial micro-mixing tube outlet flow rates. The above-mentioned initial micro-mixing tube outlet flow rate can be the flow rate of the initial mixed gas at the outlet end of the micro-mixing tube. The above-mentioned preset micro-mixing tube outlet flow rate range can be (100, +∞), and the unit can be meters per second. The first corrected micro-mixing tube outlet flow rate range can be a range of corrected micro-mixing tube outlet flow rates. The above-mentioned corrected micro-mixing tube outlet flow rate can be the flow rate of the mixed gas at the corrected micro-mixing tube outlet end. In practice, the above-mentioned execution entity can input the preset micro-mixing tube outlet flow rate range and the above-mentioned first flow coefficient into a preset corrected speed function to obtain a first corrected micro-mixing tube outlet flow rate range. Among them, the above-mentioned preset corrected speed function can be expressed by the following formula:

[0067]

[0068] Among them, v x It can be expressed as the corrected micro-mixing tube outlet flow rate. c It can represent the initial micro-mixing tube outlet flow rate. K can represent the first flow coefficient.

[0069] The sixth step is to generate a second corrected micro-mixing tube outlet flow rate range based on the above-mentioned micro-mixing tube gas density information and the preset pressure loss ratio range. Among them, the above-mentioned preset pressure loss ratio range can be a preset pressure loss ratio range. The above-mentioned preset pressure loss ratio can be the ratio of the micro-mixing tube inlet and outlet pressure loss value to the combustion chamber operating pressure. The above-mentioned micro-mixing tube inlet and outlet pressure loss value can be the difference between the gas pressure at the outlet end of the micro-mixing tube and the gas pressure at the inlet end of the micro-mixing tube. The above-mentioned preset pressure loss ratio range can be (0, 5.5%). In practice, the above-mentioned execution entity can input the above-mentioned micro-mixing tube gas density information and the preset pressure loss ratio range into the preset pressure loss ratio function to obtain the second corrected micro-mixing tube outlet flow rate range. Among them, the above-mentioned preset pressure loss ratio function can be expressed by the following formula:

[0070]

[0071] Among them, σ can represent the pressure loss ratio. ρ can represent the gas density information of the micro-mixing tube. x It can be expressed as the corrected micro-mixing tube outlet flow rate. in It can represent the flow rate of air at the inlet of the micro-mixing tube. It should be noted that the flow rate of the gas at the inlet of the micro-mixing tube is lower than the flow rate of the mixed gas at the outlet of the micro-mixing tube and can be ignored. in Here it can be 0. P can represent the above combustion chamber operating pressure information.

[0072] In the seventh step, the intersection of the first corrected micro-mixing tube outlet flow velocity range and the second corrected micro-mixing tube outlet flow velocity range is determined as the corrected micro-mixing tube outlet flow velocity range.

[0073] Step 8: Generate the second micro-mixing tube diameter range information according to the above-mentioned corrected micro-mixing tube outlet flow rate range, the above-mentioned micro-mixing tube mixed gas flow rate and the above-mentioned micro-mixing tube gas density information. In practice, the above-mentioned execution subject can input the above-mentioned corrected micro-mixing tube outlet flow rate range, the above-mentioned micro-mixing tube mixed gas flow rate and the above-mentioned micro-mixing tube gas density information into the preset micro-mixing tube flow formula to obtain the second micro-mixing tube diameter range information. Among them, the above-mentioned preset micro-mixing tube flow formula can be expressed by the following formula:

[0074]

[0075] Where Q can represent the mixed gas flow rate of the micro-mixing tube. ρ can represent the gas density information of the micro-mixing tube. x can represent the modified micro-mixing tube outlet flow rate. K can represent the first flow coefficient. d can represent the micro-mixing tube diameter.

[0076] In step 9, the micro-mixing tube diameter range information is determined according to the first micro-mixing tube diameter range information and the second micro-mixing tube diameter range information. In practice, the execution entity may determine the intersection of the first micro-mixing tube diameter range information and the second micro-mixing tube diameter range information as the micro-mixing tube diameter range information.

[0077] The above technical scheme and its related contents, as an inventive point of an embodiment of the present disclosure, solve the technical problem that "the manufacturing process is different, the roughness inside the micro-mixing tube is different, the flow coefficient is also different, and the fixed flow coefficient is used to determine the diameter of the micro-mixing tube, resulting in a low accuracy of the obtained micro-mixing tube diameter. When the diameter of the micro-mixing tube is too small, the total pressure loss value is large, resulting in low performance of the gas turbine". The factors that lead to the low performance of the gas turbine are often as follows: the manufacturing process is different, the roughness inside the micro-mixing tube is different, and the flow coefficient is also different. The fixed flow coefficient is used to determine the diameter of the micro-mixing tube, resulting in a low accuracy of the obtained micro-mixing tube diameter. When the diameter of the micro-mixing tube is too small, the total pressure loss value is large, resulting in low performance of the gas turbine. If the above factors are solved, the effect of improving the performance of the gas turbine can be achieved. In order to achieve this effect, the micro-mixing tube manufacturing method applicable to pure hydrogen gas turbines in some embodiments of the present disclosure first determines the manufacturing process of the micro-mixing tube, then determines the roughness of the micro-mixing tube, and then dynamically adjusts the flow coefficient according to the roughness of the micro-mixing tube, thereby obtaining a flow coefficient that is more in line with reality, and then a micro-mixing tube diameter range with high accuracy can be obtained for determining the diameter of the micro-mixing tube. In this way, the accuracy of the micro-mixing tube diameter can be improved, the pressure loss can be reduced, and the performance of the gas turbine can be improved.

[0078] Step 503: Determine initial pipe diameter information and initial pipe size ratio information according to the micro-mixing pipe diameter range information and the preset micro-mixing pipe size ratio range information.

[0079] In some embodiments, the execution entity may determine the initial pipe diameter information and the initial pipe size ratio information according to the micro-mixing pipe diameter range information and the preset micro-mixing pipe size ratio range information. In practice, the execution entity may determine the minimum value in the micro-mixing pipe diameter range information as the initial pipe diameter information, and determine the minimum value in the preset micro-mixing pipe size ratio range information as the initial pipe size ratio information.

[0080] Step 504, based on the initial pipeline diameter information and the initial pipeline size ratio information, perform the following determination steps:

[0081] Step 5041: construct a micro-mixing pipe structure model according to the initial pipe diameter information and the initial pipe size ratio information.

[0082] In some embodiments, the execution subject may construct a micro-mixing tube structure model according to the initial pipeline diameter information and the initial pipeline size ratio information. In practice, the execution subject may construct a micro-mixing tube structure model according to the initial pipeline diameter information, the initial pipeline size ratio information and the preset fuel hole information by using a preset three-dimensional model software. The preset fuel hole information may be information of a preset fuel hole. The preset fuel hole information may include but is not limited to the preset number of fuel holes, the preset fuel hole area, the preset fuel hole height and the preset fuel hole axial angle. The preset number of fuel holes may be the number of fuel holes opened on the side of the preset micro-mixing tube. For example, the preset number of fuel holes may be 2. The preset fuel hole area may be the area of ​​the preset fuel hole. The preset fuel hole height may be the distance between the center point of the preset fuel hole and the corresponding outlet end cross section of the micro-mixing tube body. For example, the preset fuel hole height may be 50 mm. The preset fuel hole axial angle may be the angle between the long axis of the preset fuel hole and the central axis of the corresponding micro-mixing tube body. For example, the preset fuel hole axial angle may be 45 degrees. The preset 3D model software may be a pre-set model software for 3D modeling. For example, the preset 3D model software may be UG (Unigraphics NX).

[0083] Step 5042: simulate the micro-mixing tube structure model according to the preset fluid simulation model to obtain simulation result information.

[0084] In some embodiments, the above-mentioned execution subject can simulate the above-mentioned micro-mixing tube structure model according to the preset fluid simulation model to obtain simulation result information. Among them, the above-mentioned preset fluid simulation model can be a preset fluid simulation model. For example, the above-mentioned fluid simulation model can be a Partially Premixed Combustion Model (partial premixed combustion model) or a Species Transport (component transport) model. In practice, first, the above-mentioned execution subject can import the above-mentioned micro-mixing tube structure model into the preset simulation software. Among them, the above-mentioned preset simulation software can be a preset simulation software. For example, the above-mentioned preset simulation software can be a CFD (Computational Fluid Dynamics, computational fluid dynamics) simulation software. Then, in the above-mentioned CFD simulation software, the above-mentioned preset fluid simulation model and the preset fluid turbulence model are run to obtain the simulated micro-mixing tube inlet pressure, the simulated micro-mixing tube outlet pressure, the simulated micro-mixing tube mixed gas average mass fraction and the simulated micro-mixing tube mixed gas maximum mass fraction. Among them, the above-mentioned preset fluid turbulence model can be a Realizable k-ε turbulence model. Finally, the simulated micro-mixing tube inlet pressure, the simulated micro-mixing tube outlet pressure, the simulated micro-mixing tube mixed gas average mass fraction and the simulated micro-mixing tube mixed gas maximum mass fraction are combined into simulation result information. The above combination method can be character splicing.

[0085] Step 5043, generating pressure loss information and mixing unevenness information according to the simulation result information and the above combustion chamber operating pressure information.

[0086] In some embodiments, the execution subject may generate pressure loss information and mixing unevenness information according to the simulation result information and the combustion chamber operating pressure information. The pressure loss information may characterize the loss of the inlet pressure of the micro-mixing tube and the outlet pressure of the micro-mixing tube. The mixing unevenness information may characterize the unevenness of the mixed gas in the micro-mixing tube. In practice, first, the execution subject may determine the difference between the simulated micro-mixing tube inlet pressure and the simulated micro-mixing tube outlet pressure in the simulation result information as the simulated micro-mixing tube pressure difference. Secondly, the sum of the simulated micro-mixing tube inlet pressure and the combustion chamber operating pressure is determined as the simulated total pressure value. Then, the ratio of the simulated micro-mixing tube pressure difference to the simulated total pressure value is determined as the pressure loss information. After that, the difference between the maximum mass fraction of the simulated micro-mixing tube mixed gas in the simulation result information and the average mass fraction of the simulated micro-mixing tube mixed gas is determined as the simulated mass fraction difference. Finally, the ratio of the simulated mass fraction difference to the average mass fraction of the simulated micro-mixing tube mixed gas is determined as the mixing unevenness information.

[0087] Step 5044, in response to determining that the pressure loss information and the mixing unevenness information meet the preset verification condition, the initial pipe diameter information is determined as the micro-mixing pipe diameter information, and the initial pipe size ratio information is determined as the micro-mixing pipe size ratio information.

[0088] In some embodiments, the execution subject may determine the initial pipe diameter information as the micro-mixing pipe diameter information, and determine the initial pipe size ratio information as the micro-mixing pipe size ratio information in response to determining that the pressure loss information and the mixing unevenness information meet the preset verification conditions. The preset verification condition may be that the pressure loss information is less than a preset pressure loss value and the mixing unevenness information is less than a preset unevenness. The preset pressure loss value may be a preset pressure loss value. For example, the preset pressure loss value may be 0.05. The preset unevenness may be a preset degree of uneven mixing of the mixed gas. For example, the preset unevenness may be 0.05.

[0089] Optionally, the above execution entity may also perform the following determination steps:

[0090] In response to determining that the pressure loss information and the mixing unevenness information do not meet the preset verification conditions, the initial pipe diameter information and the initial pipe size ratio information are adjusted to obtain updated initial pipe diameter information and updated initial pipe size ratio information, and the updated initial pipe diameter information is used as the initial pipe diameter information, and the updated initial pipe size ratio information is used as the initial pipe size ratio information, and the above determination step is continued. As an example, a grid search parameter adjustment method can be used to adjust the initial pipe diameter information and the initial pipe size ratio information. It should be noted that the updated initial pipe diameter information is within the micro-mixing tube diameter range corresponding to the micro-mixing tube diameter range information, and the updated initial pipe size ratio information is within the micro-mixing tube diameter range corresponding to the above micro-mixing tube diameter range information.

[0091] Step 505: Generate micro-mixing tube length information according to the micro-mixing tube diameter information and the micro-mixing tube size ratio information.

[0092] In some embodiments, the execution entity may generate the micro-mixing tube length information according to the micro-mixing tube diameter information and the micro-mixing tube size ratio information. In practice, the execution entity may determine the micro-mixing tube length information as the product of the micro-mixing tube diameter information and the micro-mixing tube size ratio information.

[0093] Step 506: Generate fuel hole information according to the micro-mixing tube diameter information and the micro-mixing tube length information.

[0094] In some embodiments, the execution entity may generate fuel hole information according to the micro-mixing tube diameter information and the micro-mixing tube length information. The fuel hole information may characterize the number, size, and position of the fuel holes. In practice, the execution entity may generate fuel hole information according to the micro-mixing tube diameter information and the micro-mixing tube length information in various ways.

[0095] In some optional implementations of some embodiments, the execution subject may generate fuel hole information according to the micro-mixing tube diameter information and the micro-mixing tube length information through the following steps:

[0096] The first step is to determine the area of ​​the micro-mixing tube according to the micro-mixing tube diameter information. In practice, the execution subject may input the micro-mixing tube diameter information into a circle area formula to obtain the area of ​​the micro-mixing tube.

[0097] The second step is to determine the total area of ​​the fuel holes by multiplying the micro-mixing tube area by the preset fuel hole area ratio. The preset fuel hole area ratio may be a preset ratio of the micro-mixing tube area to the total area of ​​the fuel holes.

[0098] The third step is to determine the initial fuel hole area and the initial fuel hole number according to the total area of ​​the fuel holes. In practice, first, the execution entity may determine the preset initial fuel hole number as the initial fuel hole number. The preset initial fuel hole number may be 1. Then, the ratio of the fuel hole area to the initial fuel hole number is determined as the initial fuel hole area.

[0099] The fourth step is to determine the initial fuel hole height and the initial fuel hole axial angle. The initial fuel hole height may be the initial value of the fuel hole height. The fuel hole height may be the distance between the center point of the fuel hole and the corresponding cross section of the outlet end of the micro-mixing tube body. The initial fuel hole axial angle may be the initial value of the fuel hole axial angle. The fuel hole axial angle may be the angle between the long axis of the fuel hole and the central axis of the corresponding micro-mixing tube body. In practice, first, the execution body may determine the preset fuel hole axial angle as the initial fuel hole axial angle. Then, the micro-mixing tube diameter is determined as the initial fuel hole height.

[0100] In the fifth step, the following simulation steps are performed according to the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle:

[0101] In the first simulation step, the micro-mixing tube structure model is constructed and updated according to the micro-mixing tube diameter information, the micro-mixing tube length information, the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle. The execution subject can construct and update the micro-mixing tube structure model according to the micro-mixing tube diameter information, the micro-mixing tube length information, the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle through the preset three-dimensional model software.

[0102] The second simulation step is to simulate the updated micro-mixing tube structure model according to the preset fluid simulation model to obtain the micro-mixing tube simulation result information. In practice, first, the execution entity can import the updated micro-mixing tube structure model into the preset simulation software. Then, in the CFD simulation software, run the preset fluid simulation model to obtain the simulated fuel hole pressure information set corresponding to each fuel hole, the simulated micro-mixing tube mixed gas average mass fraction and the simulated micro-mixing tube mixed gas maximum mass fraction. Among them, each fuel hole corresponds to a simulated fuel hole pressure information. The simulated fuel hole pressure information includes the simulated fuel hole outlet pressure and the simulated fuel hole inlet pressure. Finally, the simulated fuel hole pressure information set, the simulated micro-mixing tube mixed gas average mass fraction and the simulated micro-mixing tube mixed gas maximum mass fraction are determined as the micro-mixing tube simulation result information.

[0103] The third simulation step is to generate a fuel pore pressure ratio information set and micro-mixing tube mixing unevenness information based on the above-mentioned micro-mixing tube simulation result information. In practice, first, the above-mentioned execution entity can determine the difference between the maximum mass fraction of the simulated micro-mixing tube mixed gas and the average mass fraction of the simulated micro-mixing tube mixed gas in the above-mentioned micro-mixing tube simulation result information as the simulated mass fraction difference. Secondly, the ratio of the simulated mass fraction difference to the average mass fraction of the simulated micro-mixing tube mixed gas is determined as the micro-mixing tube mixing unevenness information. Then, for each simulated fuel hole pressure information included in the simulated fuel hole pressure information set, the ratio of the simulated fuel hole outlet pressure included in the above-mentioned simulated fuel hole pressure information to the simulated fuel hole inlet pressure is determined as the fuel pore pressure ratio information. Finally, the determined individual fuel pore pressure ratio information is determined as the fuel pore pressure ratio information set.

[0104] In the fourth simulation step, in response to determining that the above-mentioned fuel pore pressure ratio information set and the above-mentioned micro-mixing tube mixing unevenness information meet the preset fuel pore information conditions, the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle are determined as the fuel hole information. Among them, the above-mentioned preset fuel hole information conditions can be: the various fuel pore pressure ratio information included in the fuel pore pressure ratio information set are all within the preset fuel pore pressure ratio range, and the above-mentioned micro-mixing tube mixing unevenness information is less than the preset unevenness. The above-mentioned preset fuel pore pressure ratio range can be a preset fuel pore pressure ratio range. For example, the above-mentioned preset fuel pore pressure ratio range can be [1.03, 1.06]. Thereby, while ensuring that there is sufficient pressure to press the fuel into the micro-mixing tube, the pressure loss along the way can be reduced.

[0105] Optionally, the above execution subject may also perform the following simulation steps:

[0106] In the fifth simulation step, in response to determining that the above-mentioned fuel hole pressure ratio information set and the above-mentioned micro-mixing tube mixing unevenness information do not meet the above-mentioned preset fuel hole information conditions, the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle are adjusted to obtain the updated initial fuel hole area, the updated initial fuel hole number, the updated initial fuel hole height and the updated initial fuel hole axial angle, and the updated initial fuel hole area is used as the initial fuel hole area, the updated initial fuel hole number is used as the initial fuel hole number, the updated initial fuel hole height is used as the initial fuel hole height, and the updated initial fuel hole axial angle is used as the initial fuel hole axial angle, and the above-mentioned simulation steps are continued. As an example, the updated initial fuel hole area and the updated initial fuel hole number can be adjusted by the grid search parameter adjustment method for the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle. It should be noted that the product of the updated initial fuel hole area and the updated initial fuel hole number is the total area of ​​the fuel hole, the updated initial fuel hole height is less than the micro-mixing tube length information, and the updated initial fuel hole axial angle is greater than 0 degrees and less than 90 degrees.

[0107] Step 507 , controlling the associated micro-mixing tube manufacturing device to perform a micro-mixing tube manufacturing operation according to the micro-mixing tube diameter information, the micro-mixing tube length information, and the fuel hole information.

[0108] In some embodiments, the execution subject may control the associated micro-mixing tube manufacturing device to perform a micro-mixing tube manufacturing operation according to the micro-mixing tube diameter information, the micro-mixing tube length information and the fuel hole information. The micro-mixing tube manufacturing device may be a three-dimensional printing device. The micro-mixing tube manufacturing operation may be an operation of manufacturing a micro-mixing tube.

[0109] The above-mentioned embodiments of the present disclosure have the following beneficial effects: the micro-mixing tubes manufactured by the micro-mixing tube manufacturing method applicable to pure hydrogen gas turbines of some embodiments of the present disclosure can improve the performance of the gas turbine while improving the combustion stability. Specifically, the reason for the low performance of the gas turbine and the low combustion stability of the combustion chamber is that only the cooling effect is considered to determine the length of the premixing nozzle, and the influence of the length of the premixing nozzle on the mixing uniformity and pressure loss of the gas is not considered. When the length of the premixing nozzle is long, the pressure loss along the way is large, resulting in a high total pressure loss in the combustion chamber, thereby causing the performance of the gas turbine to be low. When the length of the premixing nozzle is too short, the mixing uniformity of air and hydrogen is low, resulting in a high risk of flashback of the premixing nozzle, thereby causing the combustion stability of the combustion chamber to be low. Based on this, the micro-mixing tube manufacturing method applicable to pure hydrogen gas turbines of some embodiments of the present disclosure, first, determines the combustion chamber operating temperature information and combustion chamber operating pressure information of the target pure hydrogen gas turbine. Thus, the temperature value and pressure value of the combustion chamber of the pure hydrogen gas turbine in the working state can be obtained, which can be used to determine the size of the micro-mixing tube. Secondly, according to the above combustion chamber operating temperature information and the above combustion chamber operating pressure information, the micro-mixing tube diameter range information is generated. Thus, the range of the diameter of the micro-mixing tube and the ratio range between the length and diameter of the micro-mixing tube can be obtained, which can be used for simulation. Then, according to the above micro-mixing tube diameter range information and the preset micro-mixing tube size ratio range information, the initial pipeline diameter information and the initial pipeline size ratio information are determined. Thus, the initial micro-mixing tube diameter and length can be determined, which can be used for simulation. After that, according to the initial pipeline diameter information and the initial pipeline size ratio information, the following determination steps are performed: the first step is to construct a micro-mixing tube structure model according to the initial pipeline diameter information and the initial pipeline size ratio information. Thus, the structure of the initial micro-mixing tube can be obtained, which can be used for simulation. The second step is to simulate the above micro-mixing tube structure model according to the preset fluid simulation model to obtain the simulation result information. Thus, the working state of the micro-mixing tube can be simulated through the simulation model to obtain the simulation result, which can be used to judge whether the current micro-mixing tube structure meets the expectations. The third step is to generate pressure loss information and mixing unevenness information according to the above simulation result information and the above combustion chamber operating pressure information. Thus, the pressure loss value and the unevenness of gas mixing of the current micro-mixing tube structure in the working state can be obtained, which can be used to judge whether the current micro-mixing tube structure meets expectations. In response to determining that the above pressure loss information and the above mixing unevenness information meet the preset verification conditions, the initial pipe diameter information is determined as the micro-mixing tube diameter information, and the initial pipe size ratio information is determined as the micro-mixing tube size ratio information. Thus, when the current micro-mixing tube structure meets expectations, the diameter of the micro-mixing tube body and the micro-mixing tube size ratio can be obtained. Then, based on the above micro-mixing tube diameter information and the above micro-mixing tube size ratio information, the micro-mixing tube length information is generated.Thus, the length of the micro-mixing tube body can be obtained, which can be used to manufacture the micro-mixing tube. Next, the fuel hole information is generated according to the above-mentioned micro-mixing tube diameter information and the above-mentioned micro-mixing tube length information. Thus, the information of the fuel holes that need to be opened on the micro-mixing tube body can be obtained, which can be used to manufacture the micro-mixing tube. Finally, the associated micro-mixing tube manufacturing device is controlled to perform the micro-mixing tube manufacturing operation according to the above-mentioned micro-mixing tube diameter information, the above-mentioned micro-mixing tube length information and the above-mentioned fuel hole information. Thus, a micro-mixing tube that meets the requirements can be obtained. Also, because when designing the length of the micro-mixing tube, not only the cooling effect is considered, but also the length of the micro-mixing tube that can meet the mixing uniformity of the mixed gas and reduce the pressure loss along the way is obtained through the simulation model. Therefore, the manufactured micro-mixing tube can improve the performance of the gas turbine while improving the combustion stability.

[0110] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A method for manufacturing a micro-mixing tube suitable for a pure hydrogen gas turbine, which is applied to a micro-mixing tube included in a nozzle suitable for a pure hydrogen gas turbine, and the method for manufacturing the micro-mixing tube comprises: Determine combustion chamber operating temperature information and combustion chamber operating pressure information of a target pure hydrogen gas turbine; Generate micro-mixing tube diameter range information according to the combustion chamber operating temperature information and the combustion chamber operating pressure information; Determining initial pipe diameter information and initial pipe size ratio information according to the micro-mixing pipe diameter range information and preset micro-mixing pipe size ratio range information; Based on the initial pipe diameter information and the initial pipe size ratio information, perform the following determination steps: According to the initial pipe diameter information and the initial pipe size ratio information, a micro-mixing pipe structure model is constructed; According to a preset fluid simulation model, the micro-mixing tube structure model is simulated to obtain simulation result information; Generate pressure loss information and mixing unevenness information according to the simulation result information and the combustion chamber operating pressure information; In response to determining that the pressure loss information and the mixing unevenness information meet a preset verification condition, determining the initial pipe diameter information as the micro-mixing pipe diameter information, and determining the initial pipe size ratio information as the micro-mixing pipe size ratio information; Generate micro-mixing tube length information according to the micro-mixing tube diameter information and the micro-mixing tube size ratio information; Generate fuel hole information according to the micro-mixing tube diameter information and the micro-mixing tube length information; The associated micro-mixing tube manufacturing device is controlled to perform a micro-mixing tube manufacturing operation according to the micro-mixing tube diameter information, the micro-mixing tube length information and the fuel hole information.

2. The method according to claim 1, wherein: The determining step further comprises: In response to determining that the pressure loss information and the mixing unevenness information do not meet the preset verification conditions, the initial pipeline diameter information and the initial pipeline size ratio information are adjusted to obtain updated initial pipeline diameter information and updated initial pipeline size ratio information, and the updated initial pipeline diameter information is used as the initial pipeline diameter information, and the updated initial pipeline size ratio information is used as the initial pipeline size ratio information, and the determination step is continued.

3. The method according to claim 1, wherein: The generating the micro-mixing tube diameter range information according to the combustion chamber operating temperature information and the combustion chamber operating pressure information includes: Generating micro-mixing tube gas viscosity information according to the combustion chamber operating temperature information; Generating micro-mixing tube gas density information according to the combustion chamber operating pressure information and the combustion chamber operating temperature information; Generate gas kinematic viscosity information according to the micro-mixing tube gas viscosity information and the micro-mixing tube gas density information; The micro-mixing tube diameter range information is generated according to the gas kinematic viscosity information and the preset gas average velocity.

4. The method according to claim 3, wherein: The generating of the micro-mixing tube diameter range information according to the gas kinematic viscosity information and the preset gas average velocity includes: Generate first micro-mixing tube diameter range information according to the gas kinematic viscosity information, a preset gas average velocity, and a preset Reynolds number range; The micro-mixing tube diameter range information is determined according to the first micro-mixing tube diameter range information.

5. The method according to claim 1, wherein: The generating fuel hole information according to the micro-mixing tube diameter information and the micro-mixing tube length information includes: Determining the area of ​​the micro-mixing tube according to the micro-mixing tube diameter information; The total area of ​​the fuel holes is determined by multiplying the area of ​​the micro-mixing tube by the ratio of the preset fuel hole area. Determining an initial fuel hole area and an initial fuel hole number according to the total fuel hole area; determining an initial fuel hole height and an initial fuel hole axial angle; According to the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle, the following simulation steps are performed: Constructing an updated micro-mixing tube structure model according to the micro-mixing tube diameter information, the micro-mixing tube length information, the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle; According to the preset fluid simulation model, the updated micro-mixing tube structure model is simulated to obtain micro-mixing tube simulation result information; Generate a fuel pore pressure ratio information set and micro-mixing tube mixing unevenness information according to the micro-mixing tube simulation result information; In response to determining that the fuel hole pressure ratio information set and the micro-mixing tube mixing unevenness information meet a preset fuel hole information condition, an initial fuel hole area, an initial fuel hole number, an initial fuel hole height and an initial fuel hole axial angle are determined as fuel hole information.

6. The method according to claim 5, wherein: The simulation step also includes: In response to determining that the fuel hole pressure ratio information set and the micro-mixing tube mixing unevenness information do not meet the preset fuel hole information condition, the initial fuel hole area, the initial fuel hole number, the initial fuel hole height and the initial fuel hole axial angle are adjusted to obtain an updated initial fuel hole area, an updated initial fuel hole number, an updated initial fuel hole height and an updated initial fuel hole axial angle, and the updated initial fuel hole area is used as the initial fuel hole area, the updated initial fuel hole number is used as the initial fuel hole number, the updated initial fuel hole height is used as the initial fuel hole height, and the updated initial fuel hole axial angle is used as the initial fuel hole axial angle, and the simulation step is continued.

7. A nozzle suitable for a pure hydrogen gas turbine, wherein: The nozzle comprises: a first panel, a second panel, a side panel, at least one fuel pipe and at least one micro-mixing tube, wherein the micro-mixing tube in the at least one micro-mixing tube comprises a micro-mixing tube body and at least one fuel hole, the micro-mixing tube is prepared by applying the micro-mixing tube manufacturing method applicable to a pure hydrogen gas turbine as described in any one of claims 1 to 6, the diameter of the micro-mixing tube body included in the micro-mixing tube is 3 to 5 mm, each micro-mixing tube body comprises an inlet end and an outlet end, each fuel hole included in the micro-mixing tube is arranged on the side of the corresponding micro-mixing tube body, and the center points of each fuel hole included in the micro-mixing tube are located on the same horizontal plane, The first panel, the second panel and the side panel form a fuel cavity, each of the at least one fuel pipe is arranged on the first panel, and the outlet end of each fuel pipe is connected to the fuel cavity; The inlet end of each micro-mixing tube is arranged on the first panel and is located in the fuel cavity. The first panel is provided with at least one air inlet hole. The inlet end of each micro-mixing tube corresponds to one air inlet hole, and the inlet end of each micro-mixing tube is connected to the corresponding air inlet hole. The second panel is provided with at least one mixed fuel outlet hole, and the outlet end of each micro-mixing tube corresponds to a mixed fuel outlet hole, and the outlet end of each micro-mixing tube is connected to the corresponding mixed fuel outlet hole.

8. The nozzle suitable for a pure hydrogen gas turbine according to claim 7, wherein: The angle between the long axis of each fuel hole included in the micro-mixing tube and the central axis of the corresponding micro-mixing tube body is in the range of 15 degrees to 60 degrees; The length of the micro-mixing tube body included in the micro-mixing tube is 51 to 85 mm; The diameter of each fuel hole is 0.4-0.7 mm, and the distance between the center point of the fuel hole and the corresponding cross section of the outlet end of the micro-mixing tube body is 45-75 mm.

9. The nozzle suitable for a pure hydrogen gas turbine according to claim 7, wherein: The micro-mixing tube includes an outlet end whose outer side surface is provided with at least one heat dissipation fin.

10. The nozzle suitable for a pure hydrogen gas turbine according to claim 7, wherein: The inlet end of each micro-mixing tube is provided with a chamfer.

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