A selection method and device for a compression mechanism type, an electronic device, and a storage medium

Abstract

This invention relates to the field of compressor design technology, and discloses a method, device, electronic equipment, and storage medium for selecting compressor configurations. The invention obtains a set of index parameter values ​​and a set of boundary constraint values ​​for the compressor design points. Then, it calculates the compressor's outlet converted flow rate based on the index parameter value set, calculates the compressor load coefficient based on the index parameter value set and boundary constraint value set, and finally compares the compressor's outlet converted flow rate with a preset flow rate threshold set and the compressor load coefficient with a preset load coefficient threshold to determine the target compressor configuration. This ensures that the selected compressor configuration can meet the design requirements, and eliminates the need for detailed design and validation of the compressor selection, significantly shortening the engine development cycle.

Description

Technical Field

[0001] This invention relates to the field of compressor design technology, and more specifically to a method, apparatus, electronic device, and storage medium for selecting compressor configurations. Background Technology

[0002] In aero engines, the compressor is one of the three core components. Its function is to convert mechanical energy into the pressure potential energy and kinetic energy of gas, thereby providing high-pressure air to the downstream combustion chamber. Unlike large turbofan engines that use multi-stage axial flow compressors, turboshaft / turboprop engine compressors have a wide variety of configurations, including single-stage centrifugal compressors, two-stage centrifugal compressors, axial-centrifugal combined compressors, and multi-stage axial flow compressors.

[0003] Regarding the selection of compressor configuration, the current technical solution is to select the compressor configuration based on engine power. For example, when the engine power is between 500kW and 1000kW, a two-stage centrifugal compressor is used; when the engine power is between 1000kW and 2000kW, an axial-centrifugal combined compressor is used. This method only considers engine power and does not take into account the influence of the compressor's own technical parameters on the configuration selection, resulting in relatively poor accuracy. Summary of the Invention

[0004] This invention provides a method, apparatus, electronic device, and storage medium for selecting compressor types to solve the problem of accurate compressor selection.

[0005] In a first aspect, the present invention provides a method for selecting a compressor configuration, the method comprising: obtaining a set of index parameter values ​​and a set of boundary constraint values ​​for a compressor design point, wherein the set of index parameter values ​​includes at least inlet temperature, inlet pressure, inlet physical flow rate, total pressure ratio, and efficiency, and the set of boundary constraint values ​​includes at least the tangential velocity at the maximum radius of the rotor; calculating the compressor outlet equivalent flow rate based on the set of index parameter values; calculating the compressor load factor based on the set of index parameter values ​​and the set of boundary constraint values; comparing the compressor outlet equivalent flow rate with a preset flow rate threshold set; and comparing the compressor load factor with a preset load factor threshold to determine a target compressor configuration.

[0006] The compressor configuration selection method provided in this embodiment obtains the set of index parameter values ​​and boundary constraint values ​​of the compressor design point, then calculates the compressor outlet converted flow rate based on the set of index parameter values, calculates the compressor load coefficient based on the set of index parameter values ​​and boundary constraint values, and finally compares the compressor outlet converted flow rate with a preset flow rate threshold set and the compressor load coefficient with a preset load coefficient threshold to determine the target compressor configuration. This ensures that the selected compressor configuration can meet the design requirements, and eliminates the need for detailed design and demonstration of compressor selection, significantly shortening the engine development cycle.

[0007] In one optional implementation, the preset flow threshold set includes a first flow threshold and a second flow threshold, wherein the second flow threshold is less than the first flow threshold. The compressor's outlet converted flow rate is compared with the preset flow threshold set, and the compressor load coefficient is compared with a preset load coefficient threshold to determine the target compressor configuration. This includes: comparing the compressor's outlet converted flow rate with the first flow threshold; if the compressor's outlet converted flow rate is not less than the first flow threshold, selecting a multi-stage axial flow compressor configuration.

[0008] This invention designs the principle and specific range for determining the compressor type selection based on the compressor outlet flow rate, namely, the discrimination criterion for multi-stage axial flow compressor type.

[0009] In one optional implementation, the preset load factor threshold set includes at least a first load factor threshold, a second load factor threshold, and a third load factor threshold, wherein the third load factor threshold is greater than the second load factor threshold, and the second load factor threshold is greater than the first load factor threshold. The process of comparing the compressor's outlet converted flow rate with the preset flow rate threshold set and comparing the compressor load factor with the preset load factor threshold to determine the target compressor configuration further includes: if the compressor's outlet converted flow rate is less than the first flow rate threshold, comparing the compressor load factor with the first load factor threshold; if the compressor load factor is not greater than the first load factor threshold, selecting a single-stage centrifugal compressor configuration.

[0010] In an optional embodiment, the method further includes: if the compressor load factor is within a preset load factor threshold range and the compressor outlet converted flow rate is not greater than a second flow rate threshold, selecting a two-stage centrifugal compressor configuration, wherein the lower limit of the preset load factor threshold range is the second load factor threshold and the upper limit is the third load factor threshold.

[0011] In an optional embodiment, the method further includes: if the compressor load factor is greater than the first load factor threshold but not within the preset load factor threshold range, or the compressor outlet converted flow rate is within the flow rate threshold range, selecting an axial-centrifugal combined compressor configuration, wherein the flow rate threshold range is composed of a first flow rate threshold and a second flow rate threshold.

[0012] In one alternative implementation, the compressor outlet equivalent flow rate is calculated based on the set of index parameter values ​​using the following formula:

[0013] Among them, M out Indicates the compressor outlet converted flow rate, M in P0 represents the inlet physical flow rate, P1 represents the pressure under standard atmospheric conditions at sea level, π represents the total pressure ratio, T1 represents the inlet temperature, T0 represents the temperature under standard atmospheric conditions at sea level, k represents the air adiabatic index, and η represents the efficiency.

[0014] This invention utilizes compressor design point index parameters to directly link compressor design point indexes with compressor configuration selection, eliminating the need for detailed demonstration and evaluation of different compressor configurations based on compressor design point indexes, thereby shortening the compressor configuration selection cycle.

[0015] In one alternative implementation, the compressor load factor is calculated based on the set of boundary constraint values ​​using the following formula:

[0016] in, Indicates the compressor load factor; C p The specific heat capacity of air at constant pressure is T0, the temperature at sea level under standard atmospheric conditions, π, the total pressure ratio, k, and the adiabatic index of air are all represented by U. t This represents the tangential velocity at the rotor's maximum radius.

[0017] In one optional implementation, the first flow rate threshold is 1.8 kg / s, the second flow rate threshold is 0.65 kg / s, the first load factor threshold is 0.65, the second load factor threshold is 0.8, and the third load factor threshold is 0.9.

[0018] Secondly, the present invention provides a compressor configuration selection device, the device comprising: a parameter acquisition module for acquiring a set of index parameter values ​​and a set of boundary constraint values ​​for a compressor design point, wherein the set of index parameter values ​​includes at least inlet temperature, inlet pressure, inlet physical flow rate, total pressure ratio, and efficiency, and the set of boundary constraint values ​​includes at least the tangential velocity at the maximum radius of the rotor; a converted flow rate calculation module for calculating the converted flow rate of the compressor outlet based on the set of index parameter values; a load factor calculation module for calculating the compressor load factor based on the set of index parameter values ​​and the set of boundary constraint values; and a compressor configuration determination module for comparing the converted flow rate of the compressor outlet with a preset flow rate threshold set and comparing the compressor load factor with a preset load factor threshold to determine a target compressor configuration.

[0019] Thirdly, the present invention provides an electronic device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the compressor type selection method of the first aspect or any corresponding embodiment described above.

[0020] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the method for selecting the compressor type of the first aspect or any corresponding embodiment described above. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic flowchart of the first method for selecting the type of air compressor according to an embodiment of the present invention; Figure 2 This is an example diagram of a single-stage centrifugal compressor according to an embodiment of the present invention; Figure 3 This is an example diagram of a two-stage centrifugal compressor according to an embodiment of the present invention; Figure 4 This is an example diagram of an axial-centrifugal combined air compressor according to an embodiment of the present invention; Figure 5 This is an example diagram of a multi-stage axial flow compressor according to an embodiment of the present invention; Figure 6This is a schematic diagram of a second method for selecting the type of air compressor according to an embodiment of the present invention; Figure 7 This is a flowchart illustrating a method for selecting the type of air compressor according to an embodiment of the present invention; Figure 8 This is a structural block diagram of a compressor-type selection device according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Related technologies define optimal operating ranges for each compressor configuration, such as optimal power ranges. However, these ranges are largely qualitative descriptions and not correlated with the compressor's own parameters. This lack of correlation prevents accurate and effective guidance for determining compressor configurations, potentially leading to discrepancies between the determined configuration and actual performance. Furthermore, in the demonstration and design process of turboshaft / turboprop engine compressors, multiple configuration options are typically used in the early stages of development due to the inability to directly determine the compressor configuration. After design completion, the final configuration is determined through testing and verification, resulting in long compressor development cycles and high costs. Therefore, this invention provides a compressor configuration selection method that directly determines the corresponding compressor configuration based on the design requirements and selection principles for different compressor configurations. This eliminates the need for detailed demonstration of compressor configuration selection, significantly shortening the compressor design cycle and reducing substantial costs.

[0026] According to an embodiment of the present invention, a method for selecting a compressor type is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0027] This embodiment provides a method for selecting the type of air compressor, which can be used in electronic devices. Figure 1 This is a flowchart of a method for selecting the type of air compressor according to an embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps: Step S101: Obtain the set of index parameter values ​​and boundary constraint values ​​for the compressor design point.

[0028] The set of index parameter values ​​includes at least inlet temperature, inlet pressure, inlet physical flow rate, total pressure ratio, and efficiency, while the set of boundary constraint values ​​includes at least the tangential velocity at the rotor's maximum radius.

[0029] This invention can obtain a set of index parameter values ​​for the compressor design point, including at least inlet temperature T1, inlet pressure P1, and inlet physical flow rate M. in Based on the total pressure ratio π and efficiency η, compressor selection can be performed according to the set of index parameters to ensure that the determined compressor configuration can meet the index parameter requirements. The specific set of compressor design point index parameter values ​​is shown in Table 1. Table 1 Compressor Design Point Parameters

[0030] The set of boundary constraint values ​​set in this embodiment of the invention includes at least the tangential velocity at the maximum radius of the rotor, which can be taken as 610 m / s according to material limitations, and is only used as an example.

[0031] Step S102: Calculate the compressor outlet converted flow rate based on the set of index parameter values.

[0032] The present invention provides an embodiment for calculating the compressor's outlet equivalent flow rate through the following steps, without limitation: multiply the inlet pressure by the total pressure ratio to obtain the outlet total pressure; then calculate the isentropic outlet temperature based on the inlet temperature, total pressure ratio, and specific heat ratio; calculate the actual outlet total temperature based on the efficiency and isentropic outlet temperature; and finally calculate the compressor's outlet equivalent flow rate based on the inlet physical flow rate, actual outlet total temperature, outlet total pressure, and temperature and pressure under standard sea level conditions. This is merely an example.

[0033] Step S103: Calculate the compressor load coefficient based on the set of index parameter values ​​and the set of boundary constraint values.

[0034] This embodiment of the invention can calculate the tangential velocity based on the rotor's maximum radius and rotational speed. Then, the total enthalpy rise per unit mass of the compressor can be calculated using the inlet and outlet temperatures. Finally, the total enthalpy rise per unit mass of the compressor is divided by the square of the tangential velocity to obtain the compressor load coefficient. This is only an example.

[0035] Step S104: Compare the compressor outlet converted flow rate with the preset flow rate threshold set, and compare the compressor load coefficient with the preset load coefficient threshold to determine the target compressor configuration.

[0036] The compressor selected in the embodiments of the present invention may include, but is not limited to, a single-stage centrifugal compressor, the structure of which is described in [reference needed]. Figure 2 The two-stage centrifugal compressor shown is described in the following diagram. Figure 3 The axial-centrifugal combined compressor shown is described in the following diagram. Figure 4 As shown, and the multi-stage axial flow compressor, its structure is described in [reference needed]. Figure 5 As shown, different flow thresholds can be set for different compressor configurations. For example, the flow threshold for a multi-stage axial flow compressor configuration is 1.8 kg / s. When the compressor outlet converted flow rate is greater than 1.8 kg / s, the multi-stage axial flow compressor configuration is selected. The flow threshold for a two-stage centrifugal compressor configuration is 0.65 kg / s. When the compressor outlet converted flow rate is less than 0.65 kg / s and the load factor is greater than the preset load factor threshold, the two-stage centrifugal compressor configuration can be selected. Within the range of 0.65 kg / s and 1.8 kg / s, flow thresholds can be set for single-stage centrifugal compressor configurations and axial-centrifugal combined compressor configurations, respectively. This allows for the direct determination of the target compressor configuration by comparing the compressor outlet converted flow rate with the preset flow threshold set. This is just an example.

[0037] The compressor configuration selection method provided in this embodiment obtains the set of index parameter values ​​and boundary constraint values ​​of the compressor design point, then calculates the compressor outlet converted flow rate based on the set of index parameter values, calculates the compressor load coefficient based on the set of index parameter values ​​and boundary constraint values, and finally compares the compressor outlet converted flow rate with a preset flow rate threshold set and the compressor load coefficient with a preset load coefficient threshold to determine the target compressor configuration. This ensures that the selected compressor configuration can meet the design requirements, and eliminates the need for detailed design and demonstration of compressor selection, significantly shortening the engine development cycle.

[0038] This embodiment provides a method for selecting the type of air compressor, which can be used in the aforementioned electronic equipment. Figure 6 This is a flowchart of a method for selecting the type of air compressor according to an embodiment of the present invention, such as... Figure 6 As shown, the process includes the following steps: Step S601: Obtain the set of index parameter values ​​and the set of boundary constraint values ​​for the compressor design point. The set of index parameter values ​​includes at least inlet temperature, inlet pressure, inlet physical flow rate, total pressure ratio, and efficiency. The set of boundary constraint values ​​includes at least the tangential velocity at the rotor's maximum radius. For details, please refer to [link to relevant documentation]. Figure 1 Step S101 of the illustrated embodiment will not be described again here.

[0039] Step S602: Calculate the compressor outlet converted flow rate based on the set of index parameter values.

[0040] Specifically, based on the set of index parameter values, the compressor outlet equivalent flow rate can be calculated using the following formula:

[0041] Among them, M out Indicates the compressor outlet converted flow rate, M in The inlet physical flow rate is expressed in kg / s; P0 represents the pressure under standard atmospheric conditions at sea level; P1 represents the inlet pressure; π represents the total pressure ratio; T1 represents the inlet temperature; T0 represents the temperature under standard atmospheric conditions at sea level; k represents the air adiabatic index; and η represents the efficiency.

[0042] In this embodiment of the invention, the pressure and temperature corresponding to the standard atmospheric conditions at sea level are set to 101325 Pa and 288.15 K, respectively, and the air adiabatic coefficient k is 1.4. This is only an example.

[0043] This invention utilizes compressor design point index parameters to directly link compressor design point indexes with compressor configuration selection, eliminating the need for detailed demonstration and evaluation of different compressor configurations based on compressor design point indexes, thereby shortening the compressor development cycle.

[0044] Step S603: Calculate the compressor load coefficient based on the set of index parameter values ​​and the set of boundary constraint values.

[0045] Specifically, the compressor load factor can be calculated using the following formula:

[0046] in, Indicates the compressor load factor; C p The specific heat capacity of air at constant pressure is T0, the temperature at sea level under standard atmospheric conditions, π, the total pressure ratio, k, and the adiabatic index of air are all represented by U. t This represents the tangential velocity at the rotor's maximum radius.

[0047] In this embodiment of the invention, the isobaric specific heat capacity of air at normal temperature and pressure is set to 1005 J / (kg·K), which is only an example.

[0048] Step S604: Compare the compressor outlet converted flow rate with the preset flow rate threshold set, and compare the compressor load coefficient with the preset load coefficient threshold to determine the target compressor configuration.

[0049] Specifically, the preset flow threshold set includes a first flow threshold and a second flow threshold, where the second flow threshold is less than the first flow threshold. The first and second flow thresholds can be set based on the actual design scenario. For example, the first flow threshold is 1.8 kg / s, and the second flow threshold is 0.65 kg / s. Step S604 includes: Step S6041: Compare the compressor outlet converted flow rate with the first flow rate threshold.

[0050] Step S6042: If the converted flow rate at the compressor outlet is not less than the first flow rate threshold, select the multi-stage axial flow compressor configuration.

[0051] In this embodiment of the invention, the compressor outlet converted flow rate calculated using the above formula is compared with a first flow rate threshold. If the compressor outlet converted flow rate is not less than the first flow rate threshold, a multi-stage axial flow compressor configuration can be selected for design. That is, if M... out If the flow rate is ≥1.8 kg / s, then a multi-stage axial flow compressor type should be selected.

[0052] This invention designs the principle and specific range for determining the compressor type selection based on the compressor outlet flow rate, namely, the discrimination criterion for multi-stage axial flow compressor type.

[0053] In one optional implementation, the preset load factor threshold set includes at least a first load factor threshold, a second load factor threshold, and a third load factor threshold, wherein the third load factor threshold is greater than the second load factor threshold, and the second load factor threshold is greater than the first load factor threshold. The target compressor configuration can also be determined by the following steps: if the compressor outlet converted flow rate is less than the first flow rate threshold, the compressor load factor is compared with the first load factor threshold; if the compressor load factor is not greater than the first load factor threshold, a single-stage centrifugal compressor configuration is selected.

[0054] In this embodiment of the invention, if it is determined that the compressor outlet equivalent flow rate is less than a first flow rate threshold, for example, the compressor outlet equivalent flow rate is calculated by substituting the parameter values ​​given in Table 1 into the above formula, and M is obtained. out =0.76kg / s, determine M out<1.8 kg / s, then the compressor load factor calculated using the compressor load factor formula can be compared with the first load factor threshold. The first load factor threshold can be set based on the actual design scenario and requirements. Taking 0.65 as an example, if the calculated compressor load factor is not greater than the first load factor threshold, that is... If so, then a single-stage centrifugal compressor type should be selected.

[0055] In one optional implementation, if the compressor load factor is within the preset load factor threshold range and the compressor outlet converted flow rate is not greater than the second flow rate threshold, a two-stage centrifugal compressor configuration is selected, wherein the lower limit of the preset load factor threshold range is the second load factor threshold and the upper limit is the third load factor threshold.

[0056] In this embodiment of the invention, if it is determined that the compressor load factor is greater than a first load factor threshold, it is then determined whether the compressor load factor is within a preset load factor threshold range. The lower limit of the preset load factor threshold range is a second load factor threshold, and the upper limit is a third load factor threshold. The second load factor threshold can be set to 0.8, and the third load factor threshold to 0.9. For example, the preset load factor threshold range is [0.8, 0.9]. If the compressor load factor calculated using the above formula is within the preset load factor threshold range, the calculated compressor outlet converted flow rate is further compared with a second flow rate threshold. If the outlet converted flow rate is less than the second flow rate threshold, then... And M out If the flow rate is ≤0.65 kg / s, a two-stage centrifugal compressor type should be selected first.

[0057] In one optional implementation, if the compressor load factor is greater than the first load factor threshold but not within the preset load factor threshold range, or the compressor outlet converted flow rate is within the flow rate threshold range, an axial-centrifugal combined compressor configuration is selected, and the flow rate threshold range is composed of the first flow rate threshold and the second flow rate threshold.

[0058] In this embodiment of the invention, if it is determined that the compressor load factor is greater than the first load factor threshold, but not within the preset load factor threshold range, that is... However, if the value is not within the range of [0.8, 0.9], an axial-centrifugal combined compressor configuration can be selected, or the compressor load factor can be within the preset load factor threshold range, but the compressor outlet converted flow rate can be within the flow rate threshold range, i.e., 0.65 kg / s < M. out For pressures ≤1.8kg / s, an axial-centrifugal combined compressor type can also be selected, which is only an example.

[0059] This invention establishes the principle and specific range for selecting compressor type based on compressor load coefficient, namely, the criteria for distinguishing between single-stage centrifugal, axial-centrifugal combined compressor and two-stage centrifugal compressor type.

[0060] In a specific embodiment, a set of index parameter values ​​for the compressor design point is obtained, including at least inlet temperature, inlet pressure, inlet physical flow rate, total pressure ratio, and efficiency. Then, the compressor outlet converted flow rate M is calculated based on the set of index parameter values. out The compressor outlet equivalent flow rate is compared with a first flow rate threshold (taking 1.8 kg / s as an example). If the compressor outlet equivalent flow rate is not less than the first flow rate threshold, a multi-stage axial flow compressor configuration can be selected. If the compressor outlet equivalent flow rate is less than the first flow rate threshold, the analysis continues, and the compressor load factor is calculated based on the boundary constraint value set. The compressor load factor is compared with a first preset load threshold. If the compressor load factor is not greater than the first load factor threshold, a single-stage centrifugal compressor configuration can be selected. If the compressor load factor is within the preset load factor threshold range [0.8, 0.9] and the compressor outlet converted flow rate is not greater than a second flow rate threshold, a two-stage centrifugal compressor configuration can be selected first. Otherwise, an axial-centrifugal combined compressor configuration is selected. This is just an example; for an example of the compressor configuration selection process, please refer to [link to example]. Figure 7 As shown.

[0061] This invention calculates the compressor outlet converted flow rate and compressor load coefficient by using the set of index parameter values ​​and boundary constraint values ​​of the compressor design point. Then, based on the judgment rules corresponding to each compressor configuration, the most suitable compressor configuration is selected. There is no need to carry out detailed compressor design. By making full use of the overall index requirements of the compressor design point, the compressor component configuration can be selected. The selection method is simple and efficient, significantly shortens the demonstration cycle, and has high accuracy and guidance. In addition, this invention is not limited to the judgment of single-stage compressor configuration, but is also applicable to the judgment of compressor component configuration. Its application scope can also be extended from the selection of turboshaft / turboprop engine compressors to the selection of compressors for auxiliary power units, ground gas turbines, etc.

[0062] This embodiment also provides a compressor type selection device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0063] This embodiment provides a selection device for the type of air compressor, such as... Figure 8As shown, it includes: a parameter acquisition module 801, used to acquire a set of index parameter values ​​and a set of boundary constraint values ​​for the compressor design point. The set of index parameter values ​​includes at least inlet temperature, inlet pressure, inlet physical flow rate, total pressure ratio, and efficiency. The set of boundary constraint values ​​includes at least the tangential velocity at the rotor's maximum radius. A converted flow rate calculation module 802, used to calculate the compressor's outlet converted flow rate based on the set of index parameter values. A load factor calculation module 803, used to calculate the compressor load factor based on the set of index parameter values ​​and the set of boundary constraint values. A compressor configuration determination module 804, used to compare the compressor's outlet converted flow rate with a preset flow rate threshold set and compare the compressor load factor with a preset load factor threshold to determine the target compressor configuration.

[0064] In some optional implementations, the preset flow threshold set includes a first flow threshold and a second flow threshold, wherein the second flow threshold is less than the first flow threshold. The compressor configuration determination module 804 includes: a flow comparison unit, used to compare the compressor outlet converted flow rate with the first flow threshold; and a configuration selection unit, used to select a multi-stage axial flow compressor configuration if the compressor outlet converted flow rate is not less than the first flow threshold.

[0065] In some optional implementations, the preset load factor threshold set includes at least a first load factor threshold, a second load factor threshold, and a third load factor threshold, wherein the third load factor threshold is greater than the second load factor threshold, and the second load factor threshold is greater than the first load factor threshold. The compressor configuration determination module 804 further includes: a load factor comparison unit, used to compare the compressor load factor with the first load factor threshold if the compressor outlet converted flow rate is less than the first flow rate threshold; and a configuration selection unit, used to select a single-stage centrifugal compressor configuration if the compressor load factor is not greater than the first load factor threshold.

[0066] In some optional embodiments, the compressor configuration determination module 804 further includes: a configuration selection unit, used to select a two-stage centrifugal compressor configuration if the compressor load factor is within a preset load factor threshold range and the compressor outlet converted flow rate is not greater than a second flow rate threshold, wherein the lower limit of the preset load factor threshold range is the second load factor threshold and the upper limit is the third load factor threshold.

[0067] In some optional embodiments, the compressor configuration determination module 804 further includes: a configuration selection unit, used to select an axial-centrifugal combined compressor configuration if the compressor load factor is greater than a first load factor threshold but not within a preset load factor threshold range, or the compressor outlet converted flow rate is within a flow rate threshold range, wherein the flow rate threshold range is composed of a first flow rate threshold and a second flow rate threshold.

[0068] In some alternative implementations, the compressor outlet equivalent flow rate is calculated based on the set of index parameter values ​​using the following formula:

[0069] Among them, M out Indicates the compressor outlet converted flow rate, M in The inlet physical flow rate is expressed in kg / s; P0 represents the pressure under standard atmospheric conditions at sea level; P1 represents the inlet pressure; π represents the total pressure ratio; T1 represents the inlet temperature; T0 represents the temperature under standard atmospheric conditions at sea level; k represents the air adiabatic index; and η represents the efficiency.

[0070] In some alternative implementations, the compressor load factor is calculated based on the set of boundary constraint values ​​using the following formula:

[0071] in, Indicates the compressor load factor; C p The specific heat capacity of air at constant pressure is T0, the temperature at sea level under standard atmospheric conditions, π, the total pressure ratio, k, and the adiabatic index of air are all represented by U. t This represents the tangential velocity at the rotor's maximum radius.

[0072] In some optional implementations, the first flow rate threshold is 1.8 kg / s, the second flow rate threshold is 0.65 kg / s; the first load factor threshold is 0.65, the second load factor threshold is 0.8, and the third load factor threshold is 0.9.

[0073] The compressor type selection device provided in this embodiment of the invention can execute the compressor type selection method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method. Further functional descriptions of the above modules and units are the same as in the corresponding embodiments described above, and will not be repeated here.

[0074] Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0075] The following is a detailed reference. Figure 9This diagram illustrates a structural schematic suitable for implementing an electronic device according to embodiments of the present invention. The electronic device may include a processor (e.g., a central processing unit, graphics processor, etc.) 901, which can perform various appropriate actions and processes according to a program stored in read-only memory (ROM) 902 or a program loaded from memory 908 into random access memory (RAM) 903. The RAM 903 also stores various programs and data required for the operation of the electronic device. The processor 901, ROM 902, and RAM 903 are interconnected via a bus 904. An input / output (I / O) interface 905 is also connected to the bus 904.

[0076] Typically, the following devices can be connected to I / O interface 905: input devices 906 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 907 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; memory devices 908 including, for example, magnetic tapes, hard disks, etc.; and communication devices 909. Communication device 909 allows electronic devices to exchange data via wireless or wired communication with other devices. Although Figure 9 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown, and more or fewer devices may be implemented or have instead.

[0077] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device 909, or installed from a memory 908, or installed from a ROM 902. When the computer program is executed by the processor 901, it performs the functions defined in the compressor type selection method of the embodiments of the present invention.

[0078] Figure 9 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments of the present invention.

[0079] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the method for selecting the compressor type shown in the above embodiments is implemented.

[0080] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0081] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the defined scope.

Claims

1. A method for selecting the type of air compressor, characterized in that, The method includes: Obtain the set of index parameter values ​​and the set of boundary constraint values ​​for the compressor design point. The set of index parameter values ​​includes at least inlet temperature, inlet pressure, inlet physical flow rate, total pressure ratio, and efficiency. The set of boundary constraint values ​​includes at least the tangential velocity at the maximum rotor radius. Based on the set of index parameter values, calculate the compressor outlet equivalent flow rate; Based on the set of index parameter values ​​and the set of boundary constraint values, the compressor load coefficient is calculated; The target compressor configuration is determined by comparing the compressor's outlet converted flow rate with a set of preset flow rate thresholds and comparing the compressor's load coefficient with a preset load coefficient threshold.

2. The method according to claim 1, characterized in that, The preset flow rate threshold set includes a first flow rate threshold and a second flow rate threshold, where the second flow rate threshold is less than the first flow rate threshold. The compressor's outlet converted flow rate is compared with the preset flow rate threshold set, and the compressor load factor is compared with a preset load factor threshold to determine the target compressor configuration, including: The outlet flow rate of the compressor is compared with the first flow rate threshold. If the converted outlet flow rate of the compressor is not less than the first flow rate threshold, a multi-stage axial flow compressor configuration is selected.

3. The method according to claim 2, characterized in that, The preset load factor threshold set includes at least a first load factor threshold, a second load factor threshold, and a third load factor threshold, wherein the third load factor threshold is greater than the second load factor threshold, and the second load factor threshold is greater than the first load factor threshold. The method further includes comparing the compressor's outlet converted flow rate with the preset flow rate threshold set and comparing the compressor load factor with the preset load factor threshold to determine the target compressor configuration. If the outlet converted flow rate of the compressor is less than the first flow rate threshold, the compressor load factor is compared with the first load factor threshold. If the compressor load factor is not greater than the first load factor threshold, a single-stage centrifugal compressor type is selected.

4. The method according to claim 3, characterized in that, The method further includes: If the compressor load factor is within the preset load factor threshold range and the compressor outlet converted flow rate is not greater than the second flow rate threshold, a two-stage centrifugal compressor configuration is selected. The lower limit of the preset load factor threshold range is the second load factor threshold, and the upper limit is the third load factor threshold.

5. The method according to claim 4, characterized in that, The method further includes: If the compressor load factor is greater than the first load factor threshold but not within the preset load factor threshold range, or if the compressor outlet converted flow rate is within the flow rate threshold range, the axial-centrifugal combined compressor configuration is selected, and the flow rate threshold range is composed of the first flow rate threshold and the second flow rate threshold.

6. The method according to claim 1, characterized in that, Based on the set of index parameter values, the compressor outlet equivalent flow rate is calculated using the following formula: Among them, M out Indicates the compressor outlet converted flow rate, M in P0 represents the inlet physical flow rate, P1 represents the pressure under standard atmospheric conditions at sea level, and P1 represents the inlet pressure. T1 represents the total pressure ratio, T0 represents the inlet temperature, T0 represents the temperature under standard atmospheric conditions at sea level, k represents the air adiabatic index, and η represents the efficiency.

7. The method according to claim 1, characterized in that, Based on the aforementioned set of boundary constraint values, the compressor load factor is calculated using the following formula, including: in, Indicates the compressor load factor; C p The specific heat capacity of air at constant pressure is T0, the temperature at sea level under standard atmospheric conditions, π, the total pressure ratio, k, and the adiabatic index of air are all represented by U. t This represents the tangential velocity at the rotor's maximum radius.

8. The method according to claim 3, characterized in that, The first flow rate threshold is 1.8 kg / s, the second flow rate threshold is 0.65 kg / s; the first load factor threshold is 0.65, the second load factor threshold is 0.8, and the third load factor threshold is 0.

9.

9. A selection device for a compressor mechanism, characterized in that, The device includes: The parameter acquisition module is used to acquire the set of index parameter values ​​and the set of boundary constraint values ​​at the compressor design point. The set of index parameter values ​​includes at least inlet temperature, inlet pressure, inlet physical flow rate, total pressure ratio, and efficiency. The set of boundary constraint values ​​includes at least the tangential velocity at the maximum radius of the rotor. The conversion flow calculation module is used to calculate the compressor outlet conversion flow based on the set of index parameter values; The load factor calculation module is used to calculate the compressor load factor based on the set of index parameter values ​​and the set of boundary constraint values. The compressor configuration determination module is used to compare the compressor outlet converted flow rate with a preset flow rate threshold set, and to compare the compressor load coefficient with a preset load coefficient threshold to determine the target compressor configuration.

10. An electronic device, characterized in that, include: A memory and a processor are communicatively connected, the memory storing computer instructions, and the processor executing the computer instructions to perform the compressor type selection method according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method for selecting the compressor type as described in any one of claims 1 to 8.

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