Method and device for correcting gas inlet system of gas turbine and computer equipment

Abstract

The invention provides a method and device for correcting an air inlet system of a gas turbine and computer equipment, and belongs to the technical field of gas turbines. The correction method comprises the steps of operating a test part of the gas turbine gas inlet system according to a first target parameter, and obtaining an operating parameter of the test part and a total pressure loss of the test part; a complete machine simulation model of the gas turbine gas inlet system is operated according to the second target parameter, operation parameters of the complete machine simulation model are obtained, the complete machine simulation model and the test part are correspondingly arranged, and the first target parameter and the second target parameter are correspondingly arranged; acquiring external environment parameters; acquiring a correction parameter; and correcting the total pressure loss of the test part by using the correction parameter, the operation parameter of the test part, the operation parameter of the whole machine simulation model and the external environment parameter to obtain the total pressure loss of the air inlet system. According to the invention, the test part and the complete machine simulation model are combined, and the total pressure loss of the test part is corrected, so that the more accurate total pressure loss of the air inlet system is obtained.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas turbines, and in particular relates to a correction method, device and computer equipment for an air intake system of a gas turbine. Background Art

[0002] A gas turbine is an internal combustion power machine that uses a continuously flowing gas as a working fluid to drive the impeller to rotate at high speed, converting the energy of the fuel into useful work. It is a rotating impeller heat engine. The air intake system is an important part of the gas turbine, and its safe and stable operation is crucial to the vitality of the ship.

[0003] When air flows through the gas turbine intake system, it inevitably passes through complex structures. These complex flows will increase the flow resistance loss of the intake system and increase the flow unevenness of the compressor inlet section. In addition, too small intake flow, poor uniformity, and excessive resistance loss will reduce the efficiency and surge margin of the compressor, reduce the output power of the gas turbine, increase the fuel consumption rate, and affect the normal operation of the gas turbine. Therefore, it is very important to measure the relevant parameters of the intake system.

[0004] Since the whole machine model is relatively large, it is difficult to truly restore the actual whole machine model. Generally, the whole machine is scaled down as a test component, and the test component is analyzed separately to infer the characteristics of the whole machine. Therefore, it is necessary to correct the differences between the test component and the whole machine. Summary of the invention

[0005] The purpose of this application is to provide a method, device and computer equipment for correcting the intake system of a gas turbine to solve the above-mentioned technical problems existing in the prior art.

[0006] This application is implemented as follows: In a first aspect, an embodiment of the present application provides a method for correcting a gas turbine intake system, comprising: operating a test component of the gas turbine intake system with a first target parameter, obtaining an operating parameter of the test component and a total pressure loss of the test component ; operating the whole machine simulation model of the gas turbine intake system with the second target parameter, obtaining the operating parameters of the whole machine simulation model, the whole machine simulation model is set correspondingly to the test component, and the first target parameter is set correspondingly to the second target parameter; obtaining the external environment parameter; obtaining the correction parameter; using the correction parameter and the operating parameters of the test component, the operating parameters of the whole machine simulation model and the external environment parameter to calculate the total pressure loss of the test component Make corrections to obtain the total pressure loss of the intake system .

[0007] In a second aspect, an embodiment of the present application provides a correction device for a gas turbine intake system, comprising: a first acquisition module, the first acquisition module is used to obtain the operating parameters of the test component and the total pressure loss of the test component ; a second acquisition module, the second acquisition module is used to acquire the operating parameters of the whole machine simulation model; a third acquisition module, the third acquisition module is used to acquire the external environment parameters; a fourth acquisition module, the fourth acquisition module is used to acquire the correction parameters; a correction module, the correction module uses the correction parameters and the operating parameters of the test component, the operating parameters of the whole machine simulation model and the external environment parameters to calculate the total pressure loss of the test component Make corrections to obtain the total pressure loss of the intake system .

[0008] In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the correction method provided in the embodiment of the first aspect.

[0009] The technical solution adopted by the present invention can achieve the following beneficial effects: In the present application, the total pressure loss of the test component is corrected by cooperating with the overall simulation model of the intake system to obtain a more accurate total pressure loss of the intake system; the size of the test component is smaller than the overall size of the intake system, which is more convenient for testing. At the same time, the simulation model of the intake system is used in conjunction to obtain relevant data of the entire machine, which is convenient for correcting the total pressure loss of the test component and obtaining a more accurate total pressure loss of the intake system, thereby facilitating subsequent research on the gas turbine intake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a flowchart of the correction method provided in some embodiments of the present application. DETAILED DESCRIPTION

[0012] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0013] The present application embodiment provides a method for correcting a gas turbine intake system, referring to Figure 1 As shown, the correction method includes: Step S1: Run the test component of the gas turbine intake system with the first target parameter. Set the relevant operating parameters of the test component and run the test component. Obtain the relevant parameters during the operation of the test component, including the operating parameters and the total pressure loss of the test component. .

[0014] Since the test component is not the actual complete machine, the total pressure loss obtained by running the test component is It is not the actual pressure loss of the intake system, but the total pressure loss needs to be calculated separately. Make corrections. Obtain relevant operating parameters of the test component during operation to prepare for subsequent corrections.

[0015] Step S2: Run the whole machine simulation model of the gas turbine intake system with the second target parameter. Set the relevant operating parameters of the whole machine simulation model, run the whole machine simulation model, and perform whole machine simulation calculation. Obtain the relevant parameters of the whole machine simulation model during operation to provide relevant data preparation for the correction of the total pressure loss of the test component.

[0016] The whole machine simulation model and the test component operated in step S1 are set correspondingly. The test component is formed by scaling down the whole machine corresponding to the whole machine simulation model. Only when the two are set correspondingly can the total pressure loss of the test component be combined with the operation data of the two. At the same time, the first target parameter and the second target parameter need to be set accordingly, so as to establish a connection between the whole machine simulation model and the test component, so that there is a certain correlation between the operating parameters of the two, which is convenient for the subsequent use of the operating parameters of the two to correct the total pressure loss. Make corrections.

[0017] Step S3: Obtain external environmental parameters. It should be noted that in the process of running the test component and running the whole machine simulation model, the corresponding external environmental parameters of the two need to be set equal to avoid environmental factors affecting the total pressure loss. The correction result.

[0018] Step S4: Obtain correction parameters. The correction parameters are used to adjust the total pressure loss of the test component. Make corrections.

[0019] There is no particular order for step S1, step S2, step S3 and step S4. In the process of obtaining the measurement of gas turbine related parameters, the operator can adjust the specific order of the steps according to the actual situation.

[0020] Step S5: Calculate the total pressure loss of the test component using the correction parameters obtained in step S4, the operating parameters of the test component obtained in step S1, the operating parameters of the whole machine simulation model obtained in step S2, and the external environment parameters obtained in step S3. Correction is performed to obtain the total pressure loss of the gas turbine intake system .

[0021] The correction method provided in the embodiment of the present application uses the test component of the intake system to cooperate with the whole machine simulation model to correct the total pressure loss of the test component and obtain a more accurate total pressure loss of the intake system. Although the test component is a proportional reduction of the whole machine of the intake system of the gas turbine, the total pressure loss between the two is not directly proportional, so the total pressure loss of the test component cannot be directly calculated using the proportional relationship. This application uses the operating parameters of the test components, the operating parameters of the whole machine simulation model, the external environment parameters and the correction parameters to coordinate the total pressure loss. Make corrections to obtain a more accurate total pressure loss of the intake system. , which will facilitate the subsequent research on the gas turbine intake system.

[0022] The overall size of the test component is small, which makes it easier to conduct tests directly. At the same time, the test component is a physical structure. Compared with the whole machine simulation model, the test data obtained by the test component is more in line with the actual situation and has a higher accuracy rate. The whole machine simulation model is used to make up for the disadvantage of the small size of the test component. The test component is combined with the whole machine simulation model to obtain more accurate test data.

[0023] The gas turbine involved in the embodiments of the present application is generally a marine gas turbine. The geometric size of the marine gas turbine intake system is very large. It is difficult to complete a full-scale model test under test conditions. Therefore, it is considered to adopt a modular test and set up test components similar to the intake system. In actual engineering, only partial similarity can be achieved and some similarity conditions can be met, such as geometric similarity, Mach number similarity, and Reynolds number similarity.

[0024] The first target parameter is a parameter set by the operator before the test component is run, and the second target parameter is a parameter set by the operator before the whole machine simulation model is run. The first target parameter includes the intake flow rate of the test component, and the second target parameter includes the intake flow rate of the whole machine simulation model. According to the proportional relationship between the test component and the whole machine, the equivalent flow rate of the whole machine simulation model corresponding to the intake flow rate of the test component is obtained. The equivalent flow rate should be equal to the intake flow rate of the whole machine simulation model, thereby forming a certain association between the whole machine simulation model and the test component. In some specific embodiments, if the geometric ratio between the test component and the whole machine is 1: , then according to the flow formula The calculated equivalent flow rate of the test component is its intake flow rate times.

[0025] In step S1, during the operation of the test component, the test component operation parameters that need to be obtained include: the flow rate of the air intake volute of the test component , the area of ​​the inlet volute of the test component , Non-uniformity of shutter speed of test components , working fluid density in the intake volute of the test component .

[0026] In step S2, during the operation of the whole machine simulation model, the operation parameters of the whole machine simulation model that need to be obtained include: the whole machine intake flow rate , Unevenness of shutter speed when there is no wind , Unevenness of shutter speed at different wind speeds of the whole machine , the area of ​​the overall intake volute , The whole machine intake volute flow rate when there is no wind The operating parameters of the whole machine simulation model include two types: no wind and wind. Wind means there is wind in the external environment, and no wind means there is no wind in the external environment.

[0027] In step S3, the external environmental parameters obtained include: external wind speed , Wind direction angle .

[0028] In step S4, the correction parameters obtained include: constant ,constant , Correction coefficient of blinds in windless conditions , Correction coefficient of the air intake volute when there is no wind , Correction coefficient of blinds at different wind speeds , Correction coefficient of blinds at different wind speeds and directions .

[0029] The total pressure loss of the test component is adjusted using the correction parameters Make corrections to obtain the total pressure loss of the intake system , ,in: is the correction value of the blinds when there is no wind, ; is the correction value of the intake volute when there is no wind, ; is the correction value of the blinds at different wind speeds and directions, , is the correction value of the blinds at different wind speeds, .

[0030] After obtaining the operating parameters of the test component, the operating parameters of the whole machine simulation model, the external environment parameters and the correction parameters, the total pressure loss of the test component can be calculated. Make corrections.

[0031] according to , , , The calculation formula is used to calculate the corresponding correction value, according to the total pressure loss of the intake system. The total pressure loss of the intake system is calculated by the calculation formula .

[0032] In some embodiments of the present application, the correction parameters are calculated by running the test component and the whole gas turbine intake system. Before running the test component, the correction parameters have been calculated to facilitate the subsequent testing of the test component. The specific steps for obtaining the correction parameters are as follows: Run the test components of the air intake system multiple times, and perform corresponding whole machine tests on the test components.

[0033] Obtain the total pressure loss of the test component and operating parameters, obtain the operating parameters of the whole machine experiment, obtain the external environment parameters, and obtain the loss of the blinds when there is no wind , Loss of the air intake volute when there is no wind , Loss of shutters at different wind speeds , Loss of shutters at different wind speeds and directions .

[0034] The operation of the test component and the whole machine experiment need to correspond, and the equivalent flow rate corresponding to the intake flow rate of the test component needs to be equal to the intake flow rate of the whole machine. The operating parameters of the test component are the same as the operating parameters obtained in step S1, including the flow rate of the intake volute of the test component. , the area of ​​the inlet volute of the test component , Non-uniformity of shutter speed of test components , working fluid density in the intake volute of the test component .

[0035] The types of the whole machine operating parameters are the same as the types of operating parameters obtained in step S2, including the whole machine intake flow rate , Unevenness of shutter speed when there is no wind , Unevenness of shutter speed at different wind speeds of the whole machine , the area of ​​the overall intake volute , The whole machine intake volute flow rate when there is no wind .

[0036] External environmental parameters include: external wind speed , Wind direction angle .

[0037] at this time, , , , As the quantity is known, it can be directly measured by the parameters in the whole machine test. , , , ,as well as , , , The correction parameters can be inferred from the calculation formula. In this way, when the test component is run separately in the future, the correction parameters can be used to correct the total pressure loss of the test component.

[0038] In the calculation formula, under ideal conditions, ,constant Correction factor for blinds in calm conditions is an unknown quantity, and other parameters are known quantities. By running the test components and the whole machine multiple times, multiple data, reduce errors, and use The calculation formula is used to calculate the constant Correction factor for blinds in calm conditions .

[0039] Similarly, in In the calculation formula, under ideal conditions, , correction factor of the air intake volute in the absence of wind is an unknown quantity, and other parameters are known quantities. By running the test components and the whole machine multiple times, multiple data, reduce errors, and use The calculation formula is used to calculate the correction coefficient of the air intake volute when there is no wind. .

[0040] exist In the calculation formula, under ideal conditions, ,constant Correction coefficient of blinds at different wind speeds is an unknown quantity, and other parameters are known quantities. By running the test components and the whole machine multiple times, multiple data, reduce errors, and use The calculation formula is used to calculate the constant Correction coefficient of blinds at different wind speeds Under different wind speed conditions, the correction factor The values ​​are also different. Therefore, it is necessary to set different wind speed conditions to obtain the correction coefficient of the blinds at different wind speeds. .

[0041] exist In the calculation formula, under ideal conditions, , Correction coefficient of blinds at different wind speeds and directions is an unknown quantity, and other parameters are known quantities. By running the test components and the whole machine multiple times, multiple data, reduce errors, and use The calculation formula is used to calculate the correction coefficient of the blinds at different wind speeds and directions. . Correction coefficient under different wind speed and wind direction The values ​​are different, so it is necessary to set different wind speed conditions and wind direction conditions to obtain the correction coefficient of the blinds at different wind speeds and directions. , and the correction factor And its corresponding external wind speed data and wind direction angle data are included in the database.

[0042] In step S4, when obtaining the correction parameters, the constant ,constant , Correction coefficient of blinds in windless conditions And the correction factor of the air intake volute when there is no wind They are independent of the external wind speed and direction, and these four constants and the correction coefficient There is only one, so in step S3, the values ​​of these parameters can be directly called from the calculation results. It is necessary to search the database based on the wind speed data and wind direction angle data of this test to find the correction coefficient corresponding to the wind speed and angle. .

[0043] In some embodiments of the present application, the correction value of the air intake volute when there is no wind is The calculation formula is: ,in, is the Reynolds number of the inlet volute of the test component, , is the Reynolds number of the air intake volute of the whole machine without wind, , is the equivalent diameter of the test component inlet volute, is the air intake velocity of the test component intake volute, is the equivalent diameter of the intake volute of the whole machine, is the density of the intake volute of the whole machine under different working conditions, is the air intake velocity of the whole machine intake volute, is the working fluid viscosity.

[0044] In order to facilitate the correction value when testing the test components in the future, Calculate according to the flow formula and the relationship between area and diameter , get the correction value of the intake volute when there is no wind The calculation formula is: .

[0045] For a test component, its corresponding correction parameters are determined. Before using the test component for testing, use the whole machine corresponding to the test component to conduct a whole machine experiment in advance to obtain the correction parameters corresponding to the test component in advance. In the subsequent correction process, when the correction parameters are needed, they can be directly called. The whole machine experiment is relatively cumbersome and inconvenient. After obtaining the correction parameters by conducting the whole machine experiment in the early stage, you can directly operate the test component and cooperate with the correction parameters to obtain more accurate intake system parameters, thereby improving the convenience of measuring the intake system parameters.

[0046] In some embodiments of the present application, since the structures of most ship gas turbines in the prior art are relatively similar, the structures of the test components corresponding to different gas turbines are also relatively similar. Therefore, for different test components, a set of correction parameters can be shared to a certain extent to obtain the total pressure loss of the gas turbine, providing data reference for subsequent research. For test components with similar proportions, in the process of correcting the pressure loss of one of the test components, the correction parameters of the test component with a similar proportion can be directly selected for use. In this way, the time for recalculating the correction coefficient can be saved, and the measurement efficiency of gas turbine related parameters can be improved.

[0047] In some embodiments of the present application, the shutter speed non-uniformity of the test component ,in, is the maximum velocity of the test component's air intake shutters, is the average velocity of the test component’s air intake louvers; Unevenness of shutter speed when there is no wind ,in, The maximum speed of the air intake louver when there is no wind. is the average speed of the air intake louver when there is no wind on the whole machine; Unevenness of shutter speed when there is wind on the whole machine ,in, The maximum speed of the air intake louver when there is wind on the whole machine. It is the average speed of the air intake louver when there is wind in the whole machine.

[0048] The embodiment of the present application also provides a correction device for a gas turbine intake system, comprising: A first acquisition module, which is used to acquire the operating parameters of the test component and the total pressure loss of the test component ; A second acquisition module, the second acquisition module is used to obtain operating parameters of the whole machine simulation model; A third acquisition module, the third acquisition module is used to acquire external environment parameters; A fourth acquisition module, the fourth acquisition module is used to acquire correction parameters; A correction module is used to correct the total pressure loss of the test component using the correction parameters, the operating parameters of the test component, the operating parameters of the whole machine simulation model, and the external environment parameters. Make corrections to obtain the total pressure loss of the intake system .

[0049] An embodiment of the present application further provides a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above correction method.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for correcting an air intake system of a gas turbine, characterized in that: include: The test component of the gas turbine air intake system is operated with the first target parameter to obtain the operating parameters of the test component and the total pressure loss of the test component. ; Running a whole-machine simulation model of a gas turbine intake system with a second target parameter to obtain the operating parameters of the whole-machine simulation model, wherein the whole-machine simulation model is set correspondingly to the test component, and the first target parameter is set correspondingly to the second target parameter; Get external environment parameters; Get correction parameters; The total pressure loss of the test component is calculated by using the correction parameters, the operating parameters of the test component, the operating parameters of the whole machine simulation model, and the external environmental parameters. Make corrections to obtain the total pressure loss of the intake system .

2. A method for correcting a gas turbine air intake system according to claim 1, characterized in that: The test component operating parameters include: the flow rate of the air intake volute of the test component , the area of ​​the inlet volute of the test component , Non-uniformity of shutter speed of test components , working fluid density in the intake volute of the test component ; The operating parameters of the whole machine simulation model include: the whole machine intake flow , Unevenness of shutter speed when there is no wind , Unevenness of shutter speed at different wind speeds of the whole machine , the area of ​​the overall intake volute , The whole machine intake volute flow rate when there is no wind ; The external environmental parameters include: external wind speed , Wind direction angle .

3. A method for correcting a gas turbine air intake system according to claim 2, characterized in that: The correction parameters include: constant ,constant , Correction coefficient of blinds in windless conditions , Correction coefficient of the air intake volute when there is no wind , Correction coefficient of blinds at different wind speeds , Correction coefficient of blinds at different wind speeds and directions ; The total pressure loss of the intake system ,in: is the correction value of the blinds when there is no wind, ; is the correction value of the intake volute when there is no wind, ; is the correction value of the blinds at different wind speeds and directions, , is the correction value of the blinds at different wind speeds, .

4. A method for correcting a gas turbine air intake system according to claim 3, characterized in that: Before operating the test component of the gas turbine air intake system at the first target parameter, the method includes: Run the test components of the intake system multiple times, and perform the corresponding whole machine test of the test components to obtain the total pressure loss of the test components and operating parameters, obtain the operating parameters of the whole machine experiment, obtain the external environment parameters, and obtain the loss of the blinds when there is no wind , Loss of the air intake volute when there is no wind , Loss of shutters at different wind speeds , Loss of shutters at different wind speeds and directions ; use The calculation formula is: , calculate to get the constant Correction factor for blinds in calm conditions ; use The calculation formula is: , calculate the correction coefficient of the air intake volute when there is no wind ; use The calculation formula is: , calculate to get the constant Correction coefficient of blinds at different wind speeds ; use The calculation formula is: , calculate the correction coefficient of the blinds at different wind speeds and directions , the correction factor And the corresponding external wind speed data and wind direction angle data are included in the database; The acquisition of correction parameters includes: calling constant ,constant , Correction coefficient of blinds in windless conditions , Correction coefficient of the air intake volute when there is no wind , Correction coefficient of blinds at different wind speeds , and in the database, according to the external wind speed and wind direction angle , corresponding to the correction coefficient .

5. A method for correcting a gas turbine air intake system according to claim 3, characterized in that: Non-uniformity of shutter speed of the test component ,in, is the maximum velocity of the test component's air intake shutters, is the average velocity of the test component’s air intake louvers; Unevenness of shutter speed when there is no wind ,in, The maximum speed of the air intake louver when there is no wind. is the average speed of the air intake louver when there is no wind on the whole machine; Unevenness of shutter speed when there is wind on the whole machine ,in, The maximum speed of the air intake louver when there is wind on the whole machine. It is the average speed of the air intake louver when there is wind in the whole machine.

6. A method for correcting a gas turbine air intake system according to claim 1, characterized in that: The corresponding arrangement of the whole machine simulation model and the test component includes: the test component is formed by scaling down the whole machine corresponding to the whole machine simulation model in equal proportion.

7. A method for correcting a gas turbine air intake system according to claim 6, characterized in that: The corresponding setting of the first target parameter and the second target parameter includes: The first target parameter includes the intake air flow rate of the test component, and the second target parameter includes the intake air flow rate of the whole machine simulation model; The reduced flow rate of the whole machine simulation model corresponding to the intake flow rate of the test component is obtained according to the proportional relationship between the test component and the whole machine, and the reduced flow rate is equal to the intake flow rate of the whole machine simulation model.

8. A correction device for an air intake system of a gas turbine, characterized in that: include: A first acquisition module, which is used to acquire the operating parameters of the test component and the total pressure loss of the test component ; A second acquisition module, the second acquisition module is used to obtain operating parameters of the whole machine simulation model; A third acquisition module, the third acquisition module is used to acquire external environment parameters; A fourth acquisition module, the fourth acquisition module is used to acquire correction parameters; A correction module is used to correct the total pressure loss of the test component using the correction parameters, the operating parameters of the test component, the operating parameters of the whole machine simulation model, and the external environment parameters. Make corrections to obtain the total pressure loss of the intake system .

9. A computer device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method according to claim 1.

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