A method, device and computer equipment for obtaining output parameters of a cooling device

Abstract

The present invention discloses a method, device and computer equipment for obtaining output parameters of a cooling device, including: obtaining blade parameters, first channel parameters and medium parameters of the cooling device, the blade parameters including the first blade arc length, and the medium parameters including the first outlet temperature; obtaining the Reynolds number of the cooling medium based on the first channel parameters and the medium parameters; determining the second blade arc length of the cooling medium corresponding to the first outlet temperature based on the Reynolds number, the first outlet temperature and a preset flow storage and heat exchange model; when the first blade arc length and the second blade arc length do not meet the preset conditions, adjusting the first channel parameters based on the relationship between the blade arc length and the preset conditions to obtain the second channel parameters corresponding to the first outlet temperature as the output parameters of the cooling device.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine blade cooling analysis, and in particular to a method and device for obtaining output parameters of a cooling device, and a computer device. Background Art

[0002] Turbine blade cooling technology is a hallmark of advanced aircraft engines. Existing technologies primarily rely on air as the cooling medium for cooling aircraft engines. However, due to increasing front inlet temperatures, this air-based cooling technology is increasingly insufficient to meet the actual needs of aircraft engines. Furthermore, traditional methods for analyzing cooling device parameters based on the cooling medium are no longer sufficient to meet the demands of these new cooling media. Therefore, a new approach is urgently needed to address these advanced cooling technologies. Summary of the Invention

[0003] Therefore, in order to address the deficiencies of the prior art, embodiments of the present invention provide a method, device, and computer equipment for obtaining output parameters of a cooling device.

[0004] According to a first aspect, an embodiment of the present invention discloses a method for obtaining output parameters of a cooling device, comprising:

[0005] Acquiring blade profile parameters, first channel parameters, and medium parameters of the cooling medium of the cooling device, wherein the blade profile parameters include a first blade arc length, and the medium parameters include a first outlet temperature;

[0006] According to the first channel parameter and the medium parameter, the Reynolds number of the cooling medium is obtained;

[0007] Determining a second blade arc length of the cooling medium corresponding to the first outlet temperature according to the Reynolds number, the first outlet temperature, and a preset flow storage and heat transfer model;

[0008] When the arc length of the first blade and the arc length of the second blade do not meet the preset conditions, the first channel parameters are adjusted according to the relationship between the arc length of the first blade and the arc length of the second blade and the preset conditions to obtain the second channel parameters corresponding to the first outlet temperature as the output parameters of the cooling device.

[0009] Optionally, the cooling medium in the cooling device includes two states: a laminar flow stage and a turbulent flow stage. Determining the second blade arc length of the cooling medium corresponding to the first outlet temperature according to the Reynolds number, the first outlet temperature, and a preset flow storage and heat transfer model specifically includes:

[0010] When the Reynolds number is less than or equal to a first preset threshold, and the first outlet temperature is less than or equal to a second preset threshold, it is determined that the cooling medium is in a laminar flow stage;

[0011] Determine, according to a preset flow storage and heat transfer model and a first outlet temperature, a first blade sub-arc length corresponding to the first outlet temperature in a laminar flow stage;

[0012] When the Reynolds number is greater than a first preset threshold and the first outlet temperature is greater than a second preset threshold, it is determined that the cooling medium is in a turbulent stage;

[0013] Determine, according to a preset flow storage and heat transfer model and the first outlet temperature, the second blade sub-arc length corresponding to the first outlet temperature in the turbulent stage;

[0014] The second blade arc length is obtained according to the first blade sub-arc length and the second blade sub-arc length.

[0015] Optionally, the blade profile parameters include blade height, and the first channel parameters include hydraulic diameter and inner baffle thickness;

[0016] According to the preset flow storage and heat transfer model and the first outlet temperature, the first blade sub-arc length corresponding to the first outlet temperature in the laminar flow stage is determined, specifically including:

[0017] Determine the first flow length of the cooling device in the laminar flow stage according to the flow heat transfer and heat storage model and the first outlet temperature;

[0018] According to the first flow path length, blade height, hydraulic diameter and inner baffle thickness, the first blade sub-arc length corresponding to the laminar flow stage is obtained.

[0019] Optionally, the blade profile parameters include blade height, and the channel parameters include hydraulic diameter and inner baffle thickness;

[0020] According to the preset flow storage and heat transfer model and the first outlet temperature, the second blade sub-arc length corresponding to the first outlet temperature in the turbulent stage is determined, specifically including:

[0021] determining a second flow length of the cooling device in the turbulent stage according to the first outlet temperature;

[0022] According to the second flow path length, blade height, hydraulic diameter and inner baffle thickness, the second blade sub-arc length corresponding to the turbulent stage is obtained.

[0023] Optionally, the blade parameters also include the inner wall temperature, and the medium parameters also include flow rate, constant pressure specific heat, inlet temperature, heat transfer coefficient, and thermal conductivity. The preset flow storage heat transfer model is calculated using the following formula:

[0024]

[0025] Among them, m c is the flow rate of cooling medium, C p is the constant pressure specific heat of the cooling medium, T out is the first outlet temperature, Tin is the inlet temperature, N u is the heat transfer coefficient of the cooling medium, λ is the thermal conductivity of the cooling medium, A c is the heat exchange area of ​​the cooling device, D h is the hydraulic diameter, is the average temperature in the cooling device, T w,c is the inner wall temperature, where L is the preset channel length, A c =nD h L, n=1 when in the laminar stage, n=4 when in the turbulent stage.

[0026] Optionally, when the cooling medium is in a laminar flow stage, the method further comprises:

[0027] Determine the first heat transfer coefficient in the laminar flow stage according to a preset laminar heat transfer model;

[0028] The flow storage heat transfer model is obtained according to the inner wall temperature, hydraulic diameter flow rate, constant pressure specific heat, inlet temperature, first heat transfer coefficient and thermal conductivity.

[0029] Optionally, the medium parameter further includes a viscosity coefficient. When the cooling medium is in a turbulent stage, the viscosity coefficient includes a first viscosity coefficient and a second viscosity coefficient. The method further includes:

[0030] When the Reynolds number is greater than the first preset threshold and less than the third preset threshold, a second heat transfer coefficient is obtained according to the first preset proportional Reynolds number, the first viscosity coefficient, the second viscosity coefficient, the constant pressure specific heat and the thermal conductivity; or

[0031] When the Reynolds number is greater than the third preset threshold and less than the fourth preset threshold, a second heat transfer coefficient is obtained according to the second preset proportional Reynolds number, the first viscosity coefficient, the second viscosity coefficient, the constant pressure specific heat, and the thermal conductivity, and the first preset threshold < the third preset threshold < the fourth preset threshold;

[0032] In order to obtain the flow storage heat transfer model based on the inner wall temperature, hydraulic diameter flow, constant pressure specific heat, inlet temperature, second heat transfer coefficient and thermal conductivity.

[0033] According to a second aspect, an embodiment of the present invention further discloses a device for obtaining output parameters of a cooling device, the device comprising:

[0034] an acquisition module, configured to acquire blade profile parameters, first channel parameters, and medium parameters of the cooling medium of the cooling device, wherein the blade profile parameters include a first blade arc length, and the medium parameters include a first outlet temperature;

[0035] A Reynolds number determination module, configured to obtain the Reynolds number of the cooling medium according to the first channel parameter and the medium parameter;

[0036] A second arc length determination module is used to determine a second blade arc length of the cooling medium corresponding to the first outlet temperature according to the Reynolds number, the first outlet temperature and a preset flow storage and heat transfer model;

[0037] The parameter output module is used to adjust the first channel parameter according to the relationship between the blade arc length and the preset conditions when the first blade arc length and the second blade arc length do not meet the preset conditions, so as to obtain the second channel parameter corresponding to the first outlet temperature as the output parameter of the cooling device.

[0038] According to the third aspect, an embodiment of the present invention also discloses a computer device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the method for obtaining output parameters of a cooling device as described in the first aspect or any optional embodiment of the first aspect.

[0039] According to the fourth aspect, an embodiment of the present invention further discloses a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for obtaining output parameters of a cooling device as in the first aspect or any optional embodiment of the first aspect are implemented.

[0040] The technical solution of the present invention has the following advantages:

[0041] The output parameter acquisition method, device and computer equipment of the cooling device provided by the present invention include: obtaining the blade parameters, first channel parameters and medium parameters of the cooling medium of the cooling device, and then determining the Reynolds number of the cooling medium based on the first channel parameters and the medium parameters; further, determining the second blade arc length of the cooling medium corresponding to the first outlet temperature based on the Reynolds number, the first outlet temperature in the medium parameters and a preset flow storage and heat exchange model; when the first blade arc length and the second blade arc length in the blade profile parameters do not meet the preset conditions, adjusting the first channel parameters based on the relationship between the first blade arc length, the second blade arc length and the preset conditions to obtain the second channel parameters corresponding to the first outlet temperature as the output parameter of the cooling device.

[0042] In this way, the blade parameters, first channel constant and medium parameters of the cooling device are obtained, and the Reynolds number of the cooling medium is determined based on the first channel parameters and the medium parameters, so that the state of the cooling medium in different medium parameters can be known in real time; further, the second blade arc length of the medium corresponding to the first outlet temperature is determined based on the Reynolds number, the first outlet temperature in the medium parameters and the preset flow and heat transfer model, and the required blade arc length at the first outlet temperature can be calculated; finally, whether the first blade arc length actually measured in the blade parameters and the actually required second blade arc length meet the preset conditions, and according to the relationship with the preset conditions, the first channel parameters are adjusted to obtain the second channel parameters until the preset conditions are met, so that the final second channel parameters meet the conditions required for the first outlet temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 This is a flowchart of a specific example of a method for obtaining output parameters of a cooling device according to an embodiment of the present invention;

[0045] Figure 2 This is a flowchart of a specific example of a method for obtaining output parameters of a cooling device according to an embodiment of the present invention;

[0046] Figure 3 This is a flowchart of a specific example of a method for obtaining output parameters of a cooling device according to an embodiment of the present invention;

[0047] Figure 4 This is a flowchart of a specific example of a method for obtaining output parameters of a cooling device according to an embodiment of the present invention;

[0048] Figure 5 This is a principle block diagram of a specific example of a device for obtaining output parameters of a cooling device according to an embodiment of the present invention;

[0049] Figure 6 FIG. 4 is a diagram showing a specific example of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components; wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] High turbine inlet temperatures are a hallmark of advanced aircraft engines. These increasingly high temperatures require the development of more advanced cooling technologies and heat transfer design and analysis methods. Using high-heat-sinking aerospace fluids to cool turbine blades is a key approach to fully utilizing the engine's cooling resources. During the one-dimensional design phase, precisely matching the fluid flow rate with the blade's thermal protection requirements is crucial for oil-cooled blades and plays a crucial role in their cooling design.

[0055] Existing one-dimensional cooling design methods for turbine blades are primarily based on air as the cooling medium. The physical properties and morphology of air exhibit relatively linear variations with temperature. However, high-heat sink aviation media experience a critical temperature phenomenon as temperature rises, and their physical properties that influence heat transfer characteristics undergo significant changes with increasing temperature. Therefore, traditional one-dimensional cooling design methods for turbine blades are no longer suitable for medium-cooled blades. The one-dimensional cooling design calculation method for blades involved in this invention is primarily designed for cooling configurations with single inlet and single outlet conditions within turbine blades.

[0056] In response to the technical problems mentioned in the background technology, the embodiment of the present application provides a method for obtaining output parameters of a cooling device, see Figure 1 As shown, the method includes the following steps:

[0057] Step 101: Obtain blade profile parameters, first channel parameters, and medium parameters of a cooling medium of a cooling device.

[0058] The blade profile parameters include the first blade arc length, and the medium parameters include the first outlet temperature.

[0059] Exemplarily, the blade parameters of the cooling device are the blade parameters of the turbine blades in the cooling device, wherein the blade parameters may include the blade height and the first blade arc length, wherein the first blade arc length is the actual arc length of the interface in the blade. The first channel parameter is the default parameter value of the cooling channel in the cooling device, and may specifically include the diameter of the channel, wherein the channel may be circular or rectangular, etc. The medium parameter is the parameter of the cooling medium, wherein the cooling medium in the embodiment of the present invention may be kerosene or lubricating oil, etc., wherein the medium parameter may be the flow rate, constant pressure specific heat, and inlet temperature and outlet temperature of the medium, etc. The blade parameters and the first channel parameters can be obtained by measurement, and the medium parameters can be obtained by querying the data of the medium type, etc. to obtain various types of medium parameters. The embodiment of the present invention does not limit the shape of the channel and the specific type of the cooling medium, and those skilled in the art can determine it according to actual conditions.

[0060] Step 102: Obtain the Reynolds number of the cooling medium according to the first channel parameter and the medium parameter.

[0061] For example, the Reynolds number can be calculated according to the following formula:

[0062]

[0063] Where Re represents the Reynolds number, m c is the flow rate of cooling medium, D h is the channel diameter in the first channel parameter, μ represents the viscosity coefficient in the medium parameter of the cooling medium, is the cross-sectional area of ​​the cooling channel, where the cross-sectional area can be directly calculated based on the channel. When the cooling channel is circular When the cooling channel is rectangular, the channel diameter is the side length of the cooling device, and the cross-sectional area is calculated based on the side length, where the flow rate and viscosity coefficient are medium parameters.

[0064] Step 103 : determining a second blade arc length of the cooling medium corresponding to the first outlet temperature according to the Reynolds number, the first outlet temperature, and a preset flow storage and heat transfer model.

[0065] For example, when calculating the arc length of the second blade, the cooling process of the cooling medium can be divided into a laminar flow stage and a turbulent flow stage according to the Reynolds number and the first outlet temperature.

[0066] The preset flow storage and heat transfer model can be calculated using the following formula:

[0067]

[0068] Among them, m c is the flow rate of cooling medium, C p is the constant pressure specific heat of the cooling medium, T out is the first outlet temperature, T in is the inlet temperature, N u is the heat transfer coefficient of the cooling medium, λ is the thermal conductivity of the cooling medium, A c is the heat exchange area of ​​the cooling device, D h is the channel diameter, also known as the hydraulic diameter, is the average temperature in the cooling device, T w,c is the inner wall temperature, where L is the preset channel length, A c =nD h L, n=1 when in the laminar stage, n=4 when in the turbulent stage.

[0069] make:

[0070]

[0071] The expression for the first outlet temperature can be obtained:

[0072]

[0073] T w,c is the inner wall temperature, T in is the inlet temperature

[0074] Among them, the heat transfer coefficient of the inner cavity wall of the cooling device is:

[0075]

[0076] λ is the thermal conductivity of the cooling medium, Nu is the heat transfer coefficient of the cooling medium, D h is the channel diameter, h c is the heat transfer coefficient of the blade cavity.

[0077] In a specific embodiment, the cooling medium in the cooling device includes two states: a laminar flow stage and a turbulent flow stage. According to the Reynolds number, the first outlet temperature and a preset flow storage and heat transfer model, the step of determining the arc length of the second blade of the cooling medium corresponding to the first outlet temperature is as follows: Figure 2 As shown, the specific steps include:

[0078] Step 1031 : When the Reynolds number is less than or equal to a first preset threshold, and the first outlet temperature is less than or equal to a second preset threshold, it is determined that the cooling medium is in a laminar flow stage.

[0079] Step 1032 : Determine the first blade sub-arc length corresponding to the first outlet temperature in the laminar flow stage according to the preset flow storage and heat transfer model and the first outlet temperature.

[0080] Exemplarily, when the Reynolds number is less than or equal to 2300 and the first outlet temperature is less than or equal to the critical temperature 423K (150° C.), the cooling medium is in the laminar flow stage.

[0081] In a specific embodiment, the blade profile parameter includes blade height, and the first channel parameter includes hydraulic diameter and inner baffle thickness.

[0082] like Figure 3 As shown, the calculation process of the first blade sub-arc length specifically includes the following steps:

[0083] Step 10321: Determine the first flow length of the cooling device in the laminar flow stage according to the flow heat transfer and thermal storage model and the first outlet temperature.

[0084] For example, when in the laminar flow stage, the cooling medium performs one-sided heat exchange. At this time, the heat exchange area of ​​the inner cavity wall for one-sided heat exchange is:

[0085] A c =D h L1 (6)

[0086] Wherein, L1 is the first flow length of the cooling channel when the cooling device is in the laminar flow stage.

[0087] According to formulas (1)-(6), the expression of the first process length can be obtained through calculation as the expression of L1.

[0088] Step 10322: Obtain the first blade sub-arc length corresponding to the laminar flow stage according to the first flow path length, blade height, hydraulic diameter, and inner baffle thickness.

[0089] For example, after obtaining the first process length, the first blade sub-arc length is calculated using the following formula:

[0090] l laminar =L1 / H blade ·(D h +ΔL) (7)

[0091] Among them, l laminar Indicates the first blade sub-arc length when the cooling medium is in the laminar stage, H blade is the blade height, D h is the channel diameter, ΔL is the thickness of the inner cavity partition, where the thickness of the inner partition is the preset value in the first channel parameter.

[0092] In a specific embodiment, when the cooling medium is in the laminar flow stage, the method further includes: determining the first heat transfer coefficient in the laminar flow stage according to a preset laminar heat transfer model; and obtaining a flow storage heat transfer model according to the inner wall temperature, hydraulic diameter flow, constant pressure specific heat, inlet temperature, first heat transfer coefficient and thermal conductivity.

[0093] For example, when the cooling medium is in the laminar flow stage, the preset laminar flow heat transfer model is that the first heat transfer coefficient Nu of the cooling medium is laminar Decoupled from the Reynolds number, in general, the first heat transfer coefficient Nu laminar Take 3.3 for calculation. When the channel hydraulic diameter D h When the diameter is less than 1.0 mm, the heat transfer is considered to enter the micro-channel heat transfer field, and its Nu laminar It can reach 4.36.

[0094] Step 1033: When the Reynolds number is greater than the first preset threshold and the first outlet temperature is greater than the second preset threshold, it is determined that the cooling medium is in a turbulent stage.

[0095] For example, when the Reynolds number is greater than 2300 and the first outlet temperature is greater than the critical temperature of 423K (150°C), the cooling medium is in a turbulent stage. The first outlet temperature in the turbulent stage is greater than the critical temperature, but to ensure the cooling effect, its first outlet temperature must be lower than the second outlet temperature, where the second outlet temperature is the highest outlet temperature of the cooling device.

[0096] Step 1034 , determining the second blade sub-arc length corresponding to the first outlet temperature in the turbulent stage according to the preset flow storage and heat transfer model and the first outlet temperature;

[0097] In a specific embodiment, Figure 4 As shown, the calculation process of the second blade sub-arc length specifically includes the following steps:

[0098] Step 10341: Determine a second flow length of the cooling device in the turbulent stage according to the first outlet temperature.

[0099] For example, according to formulas (1)-(5), when the cooling medium is in the turbulent stage, the heat transfer area of ​​the inner cavity wall is:

[0100] A c =4D h L2 (7)

[0101] Wherein, L2 is the second flow length of the cooling channel when the cooling device is in the turbulent stage.

[0102] According to formulas (1)-(5) and formula (7), the expression of the second process length can be obtained by calculation as the expression of L2.

[0103] Step 10342: Obtain the second blade sub-arc length corresponding to the turbulent stage based on the second flow length, blade height, hydraulic diameter, and inner baffle thickness.

[0104] For example, after obtaining the second process length, the second blade sub-arc length is calculated using the following formula:

[0105] l turbulent =L2 / H blade ·(D h +ΔL) (8)

[0106] Among them, l turbulent It represents the second blade sub-arc length when the cooling medium is in the turbulent stage, L2 is the second flow length of the cooling channel when the cooling device is in the turbulent stage, H blade is the blade height, D h is the channel diameter, ΔL is the thickness of the inner cavity partition, where the thickness of the inner partition is the preset value in the first channel parameter.

[0107] In a specific embodiment, when the cooling medium is in a turbulent stage, the viscosity coefficient includes a first viscosity coefficient and a second viscosity coefficient, and the method further includes:

[0108] When the Reynolds number is greater than the first preset threshold and less than the third preset threshold, a second heat transfer coefficient is obtained according to the first preset proportional Reynolds number, the first viscosity coefficient, the second viscosity coefficient, the constant pressure specific heat and the thermal conductivity; or

[0109] When the Reynolds number is greater than the third preset threshold and less than the fourth preset threshold, the second heat transfer coefficient is obtained based on the second preset proportional Reynolds number, the first viscosity coefficient, the second viscosity coefficient, the constant pressure specific heat and the thermal conductivity, and the first preset threshold < the third preset threshold < the fourth preset threshold.

[0110] In order to obtain the flow storage heat transfer model based on the inner wall temperature, hydraulic diameter flow, constant pressure specific heat, inlet temperature, second heat transfer coefficient and thermal conductivity.

[0111] For example, when in the turbulent stage, the Reynolds number and the heat transfer coefficient are calculated segment by segment according to the interval of the increase of the first outlet oil temperature until the oil temperature rises to the outlet oil temperature limit value T out Finally, the flow storage heat transfer model is determined based on the Reynolds number and heat transfer coefficient calculated in sections, and the arc length of the second blade in the turbulent stage is calculated.

[0112] For example,

[0113] Nu turbulent =0.0065Re 0.89 Pr 0.4 (μ f / μ w ) 0.1 2300 <Re<2×10 4

[0114] Nu turbulent =0.000045Re 1.4 Pr 0.4 (μ f / μ w ) 0.1 2×10 4 <Re<2×10 5 (8)

[0115] Where, Nu turbulent is the heat transfer coefficient of the cooling medium in laminar flow state, Pr = μ f C p / λ,μ f is the viscosity coefficient of the cooling medium corresponding to the local fluid temperature, μ w is the viscosity coefficient of the cooling medium corresponding to the local wall temperature. The first preset threshold is 2300, and the third preset threshold is 2×10 4 , the fourth preset threshold is 2×10 5 .

[0116] Step 1035 : Obtain the second blade arc length according to the first blade sub-arc length and the second blade sub-arc length.

[0117] For example, the arc length of the second blade is l real =l laminar +l turbulent , where l laminar is the length of the first blade sub-arc, l turbulent is the sub-arc length of the second blade.

[0118] Step 104, when the arc length of the first blade and the arc length of the second blade do not meet the preset conditions, adjust the first channel parameters according to the relationship between the arc length of the first blade and the arc length of the second blade and the preset conditions to obtain the second channel parameters corresponding to the first outlet temperature as the output parameters of the cooling device.

[0119] For example, the difference x between the arc length of the first blade and the arc length of the second blade is calculated, and δ = |x / first blade arc length|. When δ ≤ 1%, the channel diameter D of the cooling device corresponding to the first outlet oil temperature of the segment is output. h and the number of channels N, where the number of channels N = (L1 + L2) / H blade .

[0120] The following describes the method for obtaining the output parameters of the cooling device using a specific embodiment, taking aviation kerosene cooling of turbine blades as an example.

[0121] The height of a turbine blade is H blade =36mm, the arc length of the first blade l0 = 2 × 40mm = 80mm, the blade is made of conventional high-temperature alloy material, and the wall temperature design limit is T w =1200K. The blades are internally cooled with RP-3 aviation kerosene, and the fuel flow rate is m c =1.0g / s, inlet temperature is T in =293K, the second outlet oil temperature limit is T out =653K.

[0122] Given the hydraulic diameter of the kerosene flow channel in the blade cavity is D h =1.3mm, taking the average temperature rise of kerosene as about 20K, calculate the required inner cavity flow length of each section, and then calculate the corresponding number of inner cavities. In this embodiment, when the Reynolds number is 2300, the corresponding first critical temperature T cr =423 K. The calculation results are shown in Table 1.

[0123] Table 1 Example calculation process

[0124]

[0125]

[0126] The calculation results show that the inner cavity flow length L1 in the laminar phase is 950 mm, and the inner cavity flow length L2 in the turbulent phase is 396 mm. Taking the baffle thickness of each inner cavity as ΔL = 0.75 mm, the corresponding blade arc length in the laminar phase is 54 mm, and the blade arc length in the turbulent phase is 23 mm, for a total blade arc length requirement of 77 mm, which meets the requirement of not exceeding the actual effective blade arc length. In this case, the number of inner cavities is 77 / (1.3 mm + 0.75 mm) ≈ 38. Therefore, the main design results for one-dimensional cooling are a blade cavity hydraulic diameter of 1.3 mm and a number of cavities of 38. The detailed oil temperature rise in each segment is shown in Table 1.

[0127] In this way, the blade parameters, first channel constant and medium parameters of the cooling device are obtained, and the Reynolds number of the cooling medium is determined based on the first channel parameters and the medium parameters, so that the state of the cooling medium in different medium parameters can be known in real time; further, the second blade arc length of the medium corresponding to the first outlet temperature is determined based on the Reynolds number, the first outlet temperature in the medium parameters and the preset flow and heat transfer model, and the required blade arc length at the first outlet temperature can be calculated; finally, whether the first blade arc length actually measured in the blade parameters and the actually required second blade arc length meet the preset conditions, and according to the relationship with the preset conditions, the first channel parameters are adjusted to obtain the second channel parameters until the preset conditions are met, so that the final second channel parameters meet the conditions required for the first outlet temperature.

[0128] The above is an embodiment of the method for obtaining output parameters of the cooling device provided by the present application. The following describes other embodiments of the method for obtaining output parameters of the cooling device provided by the present application. Please refer to the following for details.

[0129] The embodiment of the present invention also discloses a device for obtaining output parameters of a cooling device, such as Figure 5 As shown, the device includes:

[0130] An acquisition module 501 is configured to acquire blade profile parameters, first channel parameters, and medium parameters of a cooling medium of a cooling device, wherein the blade profile parameters include a first blade arc length, and the medium parameters include a first outlet temperature;

[0131] A Reynolds number determination module 502 is configured to obtain the Reynolds number of the cooling medium based on the first channel parameter and the medium parameter;

[0132] A second arc length determining module 503 is configured to determine a second blade arc length of the cooling medium corresponding to the first outlet temperature based on the Reynolds number, the first outlet temperature, and a preset flow storage and heat transfer model;

[0133] The parameter output module 504 is used to adjust the first channel parameter according to the relationship between the blade arc length and the preset condition when the first blade arc length and the second blade arc length do not meet the preset condition, and obtain the second channel parameter corresponding to the first outlet temperature as the output parameter of the cooling device.

[0134] Optionally, the second arc length determination module specifically includes:

[0135] a first flow state determination module, configured to determine that the cooling medium is in a laminar flow stage when the Reynolds number is less than or equal to a first preset threshold and the first outlet temperature is less than or equal to a second preset threshold;

[0136] A first blade sub-arc length determining module is configured to determine, according to a preset flow storage and heat transfer model and a first outlet temperature, a first blade sub-arc length corresponding to the first outlet temperature in a laminar flow stage;

[0137] a second flow state determination module, configured to determine that the cooling medium is in a turbulent stage when the Reynolds number is greater than a first preset threshold and the first outlet temperature is greater than a second preset threshold;

[0138] a second blade sub-arc length determining module, configured to determine, in a turbulent stage, a second blade sub-arc length corresponding to the first outlet temperature according to a preset flow storage and heat transfer model and the first outlet temperature;

[0139] The second arc length determining submodule is configured to obtain the second blade arc length according to the first blade sub-arc length and the second blade sub-arc length.

[0140] Optionally, the blade profile parameters include blade height, and the first channel parameters include hydraulic diameter and inner baffle thickness;

[0141] The first blade sub-arc length determination module is specifically configured to:

[0142] Determine the first flow length of the cooling device in the laminar flow stage according to the flow heat transfer and heat storage model and the first outlet temperature;

[0143] According to the first flow path length, blade height, hydraulic diameter and inner baffle thickness, the first blade sub-arc length corresponding to the laminar flow stage is obtained.

[0144] Optionally, the blade profile parameters include blade height, and the channel parameters include hydraulic diameter and inner baffle thickness;

[0145] The second blade sub-arc length determination module is specifically configured to:

[0146] determining a second flow length of the cooling device in the turbulent stage according to the first outlet temperature;

[0147] According to the second flow path length, blade height, hydraulic diameter and inner baffle thickness, the second blade sub-arc length corresponding to the turbulent stage is obtained.

[0148] Optionally, the blade profile parameters also include the inner wall temperature, and the medium parameters also include flow rate, constant pressure specific heat, inlet temperature, heat transfer coefficient, and thermal conductivity. The preset flow storage heat transfer model is calculated by executing the following formula:

[0149]

[0150] Among them, m c is the flow rate of cooling medium, C p is the constant pressure specific heat of the cooling medium, T out is the first outlet temperature, T in is the inlet temperature, N u is the heat transfer coefficient of the cooling medium, λ is the thermal conductivity of the cooling medium, A c is the heat exchange area of ​​the cooling device, D h is the channel diameter, is the average temperature in the cooling device, T w,c is the inner wall temperature, where L is the preset channel length, A c =nD h L, n=1 when in the laminar stage, n=4 when in the turbulent stage.

[0151] Optionally, when the cooling medium is in a laminar flow phase, the device is further configured to:

[0152] Determine the first heat transfer coefficient in the laminar flow stage according to a preset laminar heat transfer model;

[0153] The flow storage heat transfer model is obtained according to the inner wall temperature, hydraulic diameter flow rate, constant pressure specific heat, inlet temperature, first heat transfer coefficient and thermal conductivity.

[0154] Optionally, the medium parameter further includes a viscosity coefficient. When the cooling medium is in a turbulent stage, the viscosity coefficient includes a first viscosity coefficient and a second viscosity coefficient. The device is further configured to:

[0155] When the Reynolds number is greater than the first preset threshold and less than the third preset threshold, a second heat transfer coefficient is obtained according to the first preset proportional Reynolds number, the first viscosity coefficient, the second viscosity coefficient, the constant pressure specific heat and the thermal conductivity; or

[0156] When the Reynolds number is greater than the third preset threshold and less than the fourth preset threshold, a second heat transfer coefficient is obtained according to the second preset proportional Reynolds number, the first viscosity coefficient, the second viscosity coefficient, the constant pressure specific heat, and the thermal conductivity, and the first preset threshold < the third preset threshold < the fourth preset threshold;

[0157] In order to obtain the flow storage heat transfer model based on the inner wall temperature, hydraulic diameter flow, constant pressure specific heat, inlet temperature, second heat transfer coefficient and thermal conductivity.

[0158] The functions performed by the various components in the device for obtaining output parameters of a cooling device provided by an embodiment of the present invention have been described in detail in any of the above method embodiments, and therefore will not be repeated here.

[0159] By executing this device, the location information of the highway whose output parameters are to be cooled is obtained. According to the location information, all the areas through which the highway passes can be determined. When the highway passes through multiple areas, the highway is divided based on the corresponding areas to obtain sub-sections corresponding to each area; meteorological data in each area is obtained, and the wind and solar resources in the area are evaluated according to the meteorological data to obtain wind and solar resource data corresponding to the area, so that a more accurate wind and solar resource evaluation can be performed on the corresponding sub-section according to the corresponding area; secondly, the actual energy consumed by the sub-sections included in each area is counted, and the wind and solar resource data in each area is compared with the actual energy to determine whether the wind and solar resource data in the area can meet the actual consumption of the sub-sections in the area. Furthermore, the energy supply situation of each sub-section in the area can be adjusted according to the wind and solar resource data.

[0160] The embodiment of the present invention also provides a computer device, such as Figure 6 As shown, the computer device may include a processor 601 and a memory 602, wherein the processor 601 and the memory 602 may be connected via a bus or other means. Figure 3 The bus connection is taken as an example.

[0161] The processor 601 may be a central processing unit (CPU). The processor 601 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0162] Memory 602, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as the program instructions / modules corresponding to the exercise training method in the embodiments of the present invention. Processor 601 executes the non-transitory software programs, instructions, and modules stored in memory 602 to perform various processor functions and data processing, thereby implementing the exercise training method in the above-mentioned method embodiments.

[0163] The memory 602 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created by the processor 601, etc. In addition, the memory 602 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 602 may optionally include a memory remotely located relative to the processor 601, and these remote memories may be connected to the processor 601 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0164] One or more modules are stored in the memory 602 and when executed by the processor 601, the execution is as follows: Figure 1 The method for obtaining output parameters of the cooling device in the illustrated embodiment.

[0165] For details of the above computer equipment, please refer to Figure 1 The corresponding descriptions and effects in the embodiments shown can be understood and will not be repeated here.

[0166] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD). The storage medium can also include a combination of the above-mentioned types of memory.

[0167] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for obtaining output parameters of a cooling device, characterized in that: include: Obtaining blade profile parameters, first channel parameters, and medium parameters of the cooling medium of the cooling device, wherein the blade profile parameters include inner wall temperature and first blade arc length, and the medium parameters include flow rate, constant pressure specific heat, inlet temperature, heat transfer coefficient, thermal conductivity, and first outlet temperature; Obtaining a Reynolds number of the cooling medium according to the first channel parameter and the medium parameter; determining, according to the Reynolds number, the first outlet temperature, and a preset flow storage and heat transfer model, a second blade arc length of the cooling medium corresponding to the first outlet temperature; When the first blade arc length and the second blade arc length do not meet a preset condition, adjusting the first channel parameter according to a relationship between the first blade arc length, the second blade arc length and the preset condition to obtain a second channel parameter corresponding to the first outlet temperature as an output parameter of the cooling device; The preset flow storage heat exchange model is calculated by the following formula: in, is the flow rate of the cooling medium, is the constant pressure specific heat of the cooling medium, is the first outlet temperature, is the inlet temperature, is the heat transfer coefficient of the cooling medium, is the thermal conductivity of the cooling medium, is the heat exchange area of ​​the cooling device, is the channel diameter, is the average temperature in the cooling device, is the inner wall temperature, where is the preset channel length, , , when in the laminar flow stage , when in the turbulent stage .

2. The method according to claim 1, characterized in that The cooling medium in the cooling device includes two states: a laminar flow stage and a turbulent flow stage. Determining the second blade arc length of the cooling medium corresponding to the first outlet temperature according to the Reynolds number, the first outlet temperature, and a preset flow storage and heat transfer model specifically includes: When the Reynolds number is less than or equal to a first preset threshold, and the first outlet temperature is less than or equal to a second preset threshold, determining that the cooling medium is in a laminar flow stage; Determining, according to a preset flow storage and heat transfer model and the first outlet temperature, a first blade sub-arc length corresponding to the first outlet temperature in the laminar flow stage; When the Reynolds number is greater than a first preset threshold and the first outlet temperature is greater than a second preset threshold, it is determined that the cooling medium is in a turbulent stage; determining, according to a preset flow storage and heat transfer model and the first outlet temperature, a second blade sub-arc length corresponding to the first outlet temperature in the turbulent stage; The second blade arc length is obtained according to the first blade sub-arc length and the second blade sub-arc length.

3. The method according to claim 2, characterized in that The blade profile parameters include blade height, and the first channel parameters include hydraulic diameter and inner baffle thickness; The determining, according to a preset flow storage and heat transfer model and the first outlet temperature, a first blade sub-arc length corresponding to the first outlet temperature in the laminar flow stage specifically includes: determining a first flow path length of the cooling device in a laminar flow stage according to the flow heat storage and transfer model and the first outlet temperature; The first blade sub-arc length corresponding to the laminar flow stage is obtained according to the first flow path length, the blade height, the hydraulic diameter and the inner baffle thickness.

4. The method according to claim 2, characterized in that The blade profile parameters include blade height, and the channel parameters include hydraulic diameter and inner baffle thickness; The determining, according to a preset flow storage and heat transfer model and the first outlet temperature, the second blade sub-arc length corresponding to the first outlet temperature in the turbulent stage specifically includes: determining a second flow length of the cooling device in a turbulent stage according to the first outlet temperature; The second blade sub-arc length corresponding to the turbulent stage is obtained according to the second flow path length, the blade height, the hydraulic diameter and the inner baffle thickness.

5. The method according to claim 3 or 4, characterized in that When the cooling medium is in a laminar flow stage, the method further comprises: Determining a first heat transfer coefficient in the laminar flow stage according to a preset laminar heat transfer model; The flow storage heat transfer model is obtained according to the inner wall temperature, the hydraulic diameter, the flow rate, the constant pressure specific heat, the inlet temperature, the first heat transfer coefficient and the thermal conductivity coefficient.

6. The method according to claim 3 or 4, characterized in that The medium parameter further includes a viscosity coefficient. When the cooling medium is in a turbulent stage, the viscosity coefficient includes a first viscosity coefficient and a second viscosity coefficient. The method further includes: When the Reynolds number is greater than a first preset threshold value and less than a third preset threshold value, a second heat transfer coefficient is obtained according to a first preset proportional Reynolds number, the first viscosity coefficient, the second viscosity coefficient, the constant pressure specific heat, and the thermal conductivity; or When the Reynolds number is greater than a third preset threshold and less than a fourth preset threshold, a second heat transfer coefficient is obtained according to a second preset proportional Reynolds number, the first viscosity coefficient, the second viscosity coefficient, the constant pressure specific heat, and the thermal conductivity, and the first preset threshold < the third preset threshold < the fourth preset threshold; In order to obtain the flow heat storage model according to the inner wall temperature, the hydraulic diameter, the flow rate, the constant pressure specific heat, the inlet temperature, the second heat transfer coefficient and the thermal conductivity coefficient.

7. A device for obtaining output parameters of a cooling device, characterized in that: The device comprises: an acquisition module, configured to acquire blade profile parameters, first channel parameters, and medium parameters of the cooling medium of the cooling device, wherein the blade profile parameters include an inner wall temperature and a first blade arc length, and the medium parameters include a flow rate, a constant pressure specific heat, an inlet temperature, a heat transfer coefficient, a thermal conductivity, and a first outlet temperature; a Reynolds number determination module, configured to obtain the Reynolds number of the cooling medium according to the first channel parameter and the medium parameter; a second arc length determining module, configured to determine a second blade arc length of the cooling medium corresponding to the first outlet temperature according to the Reynolds number, the first outlet temperature, and a preset flow storage and heat transfer model; a parameter output module, configured to, when the first blade arc length and the second blade arc length do not satisfy a preset condition, adjust the first channel parameter according to a relationship between the blade arc length and the preset condition, to obtain a second channel parameter corresponding to the first outlet temperature as an output parameter of the cooling device; The preset flow storage heat exchange model is calculated by the following formula: in, is the flow rate of the cooling medium, is the constant pressure specific heat of the cooling medium, is the first outlet temperature, is the inlet temperature, is the heat transfer coefficient of the cooling medium, is the thermal conductivity of the cooling medium, is the heat exchange area of ​​the cooling device, is the channel diameter, is the average temperature in the cooling device, is the inner wall temperature, where is the preset channel length, , , when in the laminar flow stage , when in the turbulent stage .

8. A computer device, characterized in that: include: at least one processor; And a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the output parameter acquisition method of the cooling device as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for obtaining output parameters of a cooling device according to any one of claims 1 to 6 are implemented.

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