Method, device, equipment and medium for generating aircraft wheel cooling fan model

Abstract

The present invention discloses a method, device, equipment and medium for generating an aircraft wheel cooling fan model. The present invention can obtain initial performance parameters of the fan that meet the brake heat dissipation requirements based on the initial model of the fan and the aircraft brake heat dissipation flow channel model, and can calculate the structural geometric parameters of the fan based on the initial performance parameters of the fan; then, the structure of the initial model of the fan can be optimized based on the aforementioned calculated structural geometric parameters, so as to obtain an optimized wheel fan model; finally, the heat dissipation simulation technology can be used to obtain its optimal performance parameters; therefore, the present invention can confirm and optimize the fan structural parameters according to the flow channel conditions of different wheels, so that the fan can be more suitable for the wheel of this aircraft, so that the fan has higher cooling efficiency, better functional performance and higher stability, and is therefore very suitable for large-scale application and promotion.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft wheel cooling fan design, and in particular relates to a method, device, equipment and medium for generating an aircraft wheel cooling fan model. Background Art

[0002] As a component of aircraft wheels, aircraft cooling fans have become an indispensable onboard equipment of aircraft. Among them, aircraft cooling fans are installed in the axle of aircraft wheels. After the aircraft brakes, the overheated brake device can be quickly cooled. Therefore, the cooling fan can ensure the braking performance of the brake device, reduce the aircraft's parking time, and ensure the aircraft's next deployment, thereby improving the performance of the entire aircraft.

[0003] At present, when designing aircraft cooling fans, most of them simply change the shape of the existing fans to meet the design requirements of wheels of different sizes. Therefore, the above-mentioned prior art has the following shortcomings: when designing, the adaptation problem with the aircraft is not taken into consideration. In this way, it is impossible to adapt to the heat dissipation flow channel of the wheel and cannot provide higher heat dissipation efficiency and stability. Based on this, it has become an urgent problem to provide a method for generating an aircraft wheel cooling fan model. Summary of the invention

[0004] The purpose of the present invention is to provide a method, device, equipment and medium for generating an aircraft wheel cooling fan model, so as to solve the problem in the prior art that the cooling channel of the wheel cannot be adapted to provide higher cooling efficiency and stability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a method for generating an aircraft wheel cooling fan model is provided, comprising:

[0007] Obtain the initial fan model and the brake cooling channel model of the target aircraft;

[0008] Based on the initial fan model and the brake cooling channel model, a fluid simulation model for wheel fan cooling is established, and using the fluid simulation model, initial performance parameters of the wheel fan that meet the brake cooling requirements of the target aircraft are obtained;

[0009] Determining structural geometric parameters of the wheel fan according to the initial performance parameters;

[0010] According to the structural geometric parameters, the initial fan model is structurally optimized to obtain an optimized wheel-fan model;

[0011] Performing heat dissipation simulation processing on the optimized wheel-fan model to obtain optimal performance parameters of the optimized wheel-fan model;

[0012] A numerical model of the wheel fan of the target aircraft is generated according to the optimal performance parameters and the optimized wheel fan model.

[0013] Based on the above disclosed content, the present invention first obtains the initial fan model of the wheel fan and the brake cooling flow channel model of the target aircraft; then, the above two models are used to construct a fluid simulation model for wheel fan cooling, so as to determine the initial performance parameters of the wheel fan when it meets the brake cooling requirements through the above fluid simulation model; then, the present invention generates the structural geometric parameters of the wheel fan based on the initial performance parameters, and based on this, performs structural optimization on the initial fan model to obtain an optimized wheel fan model; then, the optimized wheel fan model is subjected to heat dissipation simulation processing, and the optimal performance parameters of the optimized wheel fan model can be obtained; finally, according to the above optimized wheel fan model and the optimal performance parameters, a digital model of the wheel fan adapted to the flow channel of the target aircraft can be generated.

[0014] Through the above design, the present invention can obtain the initial performance parameters of the fan that meet the brake heat dissipation requirements based on the initial model of the fan and the aircraft brake heat dissipation flow channel model, and can calculate the structural geometric parameters of the fan based on the initial performance parameters of the fan; then, the structure of the initial model of the fan can be optimized based on the aforementioned calculated structural geometric parameters, so as to obtain the optimized wheel fan model; finally, the heat dissipation simulation technology can be used to obtain its optimal performance parameters; thus, the present invention can confirm and optimize the fan structural parameters according to the flow channel conditions of different wheels, so that the fan can be more suitable for the wheel of this aircraft, so that the fan has higher cooling efficiency, better functional performance and higher stability, and therefore, is very suitable for large-scale application and promotion.

[0015] In a possible design, the initial performance parameters include fan speed, fan static pressure and fan air volume, wherein the structural geometric parameters of the wheel fan are determined based on the initial performance parameters, including:

[0016] Calculating the specific speed of the wheel fan based on the fan speed, the fan static pressure and the fan air volume, and determining the hub ratio of the wheel fan using the specific speed;

[0017] Calculating the circumferential speed of the wheel fan according to the fan speed;

[0018] Calculating the axial speed of the wheel fan using the fan air volume and the hub ratio, and determining the rotation speed change of the wheel fan using the circumferential speed and the fan static pressure;

[0019] Based on the hub ratio, the circumferential speed, the axial speed and the rotation speed change, the structural geometric parameters of the wheel fan are determined.

[0020] In one possible design, the specific speed of the wheel fan is calculated based on the fan speed, the fan static pressure and the fan air volume, including:

[0021] The specific speed of the wheel fan is calculated according to the fan speed, the fan static pressure and the fan air volume and in accordance with the following formula (1);

[0022] n s =σn·Q b / P z (1)

[0023] In the above formula (1), n s represents the specific speed of the wheel fan, n represents the fan speed, Q represents the fan air volume, P represents the fan static pressure, and σ, b, and z are all constants;

[0024] Correspondingly, determining the hub ratio of the wheel fan by using the specific speed includes:

[0025] Obtain a curve diagram showing the relationship between the fan specific speed and the hub ratio;

[0026] Based on the specific speed of the wheel fan and the relationship curve diagram, the hub ratio of the wheel fan is determined.

[0027] In a possible design, the circumferential speed of the wheel fan is calculated according to the fan speed, including:

[0028] Acquire design parameters of the wheel fan, wherein the design parameters include an outer diameter of the wheel fan;

[0029] According to the outer diameter and the fan speed, the circumferential speed of the wheel fan is calculated according to the following formula (2);

[0030]

[0031] In the above formula (2), u represents the circumferential speed, D represents the outer diameter, and n s Indicates the specific speed of the wheel fan;

[0032] Correspondingly, the axial speed of the wheel fan is calculated by using the fan air volume and the hub ratio, and the change in the rotation speed of the wheel fan is determined by using the circumferential speed and the fan static pressure, which includes:

[0033] The axial speed is calculated using the following formula (3), and the rotation speed change is calculated using the following formula (4);

[0034]

[0035]

[0036] In the above formula (3), c a represents the axial speed of the wheel fan, Q represents the fan air volume, Indicates the wheel hub ratio;

[0037] In the above formula (4), Δc u represents the change in rotation speed, P represents the static pressure of the fan, ρ represents the air density, and η represents the efficiency of the wheel fan.

[0038] In a possible design, based on the hub ratio, the circumferential speed, the axial speed and the rotation speed variation, the structural geometric parameters of the wheel fan are obtained, including:

[0039] Acquire design parameters of the wheel fan, wherein the design parameters include an outer diameter of the wheel fan;

[0040] Calculating the product of the outer diameter of the wheel fan and the hub ratio to obtain the hub diameter of the wheel fan;

[0041] Based on the hub ratio, determining an optimal number of blades for the wheel fan;

[0042] Calculating an average relative speed of the wheel fan according to the circumferential speed, the axial speed and the amount of change in the rotational speed, and calculating an airflow angle of the wheel fan based on the axial speed and the average relative speed;

[0043] Determining the blade installation angle of the wheel fan by using the airflow angle;

[0044] The structural geometric parameters are composed of the hub diameter, the optimal number of blades and the blade installation angle of the wheel fan.

[0045] In a possible design, the average relative speed of the wheel fan is calculated according to the circumferential speed, the axial speed and the rotation speed variation, including:

[0046] Based on the circumferential speed, the axial speed and the rotation speed change, and in accordance with the following formula (5), the average relative speed of the wheel fan is calculated;

[0047]

[0048] In the above formula (5), w m represents the average relative velocity, c a represents the axial speed of the wheel fan, Δc u represents the change in the rotation speed, and u represents the circumferential speed;

[0049] Accordingly, based on the axial velocity and the average relative velocity, the airflow angle of the wheel fan is calculated, which includes:

[0050] According to the following formula (6), the airflow angle of the wheel fan is calculated;

[0051] β m =sin -1 (c a / w m ) (6)

[0052] In the above formula (6), β m represents the airflow angle.

[0053] In a possible design, the blade profile installation angle of the wheel fan is determined by using the airflow angle, including:

[0054] Obtaining a thickness corresponding to a blade airfoil of the wheel fan, and determining an angle of attack of the blade airfoil of the wheel fan based on the thickness corresponding to the blade airfoil of the wheel fan;

[0055] The sum of the airflow angle and the blade airfoil attack angle is used as the blade installation angle of the wheel fan.

[0056] In a second aspect, a device for generating an aircraft wheel cooling fan model is provided, comprising:

[0057] A simulation unit, for establishing a fluid simulation model for wheel fan heat dissipation based on the initial fan model and the brake heat dissipation flow channel model, and using the fluid simulation model to obtain initial performance parameters of the wheel fan that meet the brake heat dissipation requirements of the target aircraft;

[0058] A parameter generating unit, used for determining the structural geometric parameters of the wheel fan according to the initial performance parameters;

[0059] A model optimization unit, configured to perform structural optimization on the initial fan model according to the structural geometric parameters to obtain an optimized wheel-fan model;

[0060] The simulation unit is further used to perform heat dissipation simulation processing on the optimized wheel-fan model to obtain the optimal performance parameters of the optimized wheel-fan model;

[0061] The model generation unit is used to generate a digital model of the wheel fan of the target aircraft according to the optimal performance parameters and the optimized wheel fan model.

[0062] In a third aspect, another device for generating an aircraft wheel cooling fan model is provided. Taking the device as an electronic device as an example, the device includes a memory, a processor and a transceiver which are communicatively connected in sequence, wherein the memory is used to store a computer program, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute the method for generating the aircraft wheel cooling fan model as in the first aspect or any possible design of the first aspect.

[0063] In a fourth aspect, a storage medium is provided, on which instructions are stored, and when the instructions are executed on a computer, a method for generating an aircraft wheel cooling fan model as in the first aspect or any possible design of the first aspect is executed.

[0064] In a fifth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, causes the computer to execute the method for generating an aircraft wheel cooling fan model as in the first aspect or any possible design of the first aspect.

[0065] Beneficial effects:

[0066] (1) The present invention can obtain the initial performance parameters of the fan that meet the brake heat dissipation requirements based on the initial model of the fan and the aircraft brake heat dissipation flow channel model, and can calculate the structural geometric parameters of the fan based on the initial performance parameters of the fan; then, the structure of the initial model of the fan can be optimized based on the aforementioned calculated structural geometric parameters, so as to obtain the optimized wheel fan model; finally, the heat dissipation simulation technology can be used to obtain its optimal performance parameters; therefore, the present invention can confirm and optimize the fan structural parameters according to the flow channel conditions of different wheels, so that the fan can be more suitable for the wheel of this aircraft, so that the fan has higher cooling efficiency, better functional performance and higher stability, and is therefore very suitable for large-scale application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic flow chart of the steps of a method for generating an aircraft wheel cooling fan model provided by an embodiment of the present invention;

[0068] Figure 2A curve diagram showing the relationship between the fan specific speed and the hub ratio provided in an embodiment of the present invention;

[0069] Figure 3 A diagram showing the relationship between different thicknesses of fan airfoils and pressure coefficients and angles of attack provided by an embodiment of the present invention;

[0070] Figure 4 A pressure distribution cloud diagram of an optimized wheel-fan model provided in an embodiment of the present invention;

[0071] Figure 5 A velocity streamline distribution diagram of an optimized wheel-fan model provided by an embodiment of the present invention;

[0072] Figure 6 A schematic diagram of the structure of a device for generating an aircraft wheel cooling fan model provided by an embodiment of the present invention;

[0073] Figure 7 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0074] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0075] It should be understood that although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, a first unit can be referred to as a second unit, and similarly, a second unit can be referred to as a first unit without departing from the scope of the exemplary embodiments of the present invention.

[0076] It should be understood that the term "and / or" that may appear in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" that may appear in this article describes another type of association object relationship, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " that may appear in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0077] Example:

[0078] See also Figure 1 As shown, the method for generating an aircraft wheel cooling fan model provided in the present embodiment can optimize the design of the fan structure geometric parameters according to the flow path conditions of different wheels, so that the fan structure can be optimized based on the obtained structural geometric parameters; at the same time, the present method also uses simulation processing means to obtain the optimal performance parameters of the fan, and finally, the aforementioned optimized structural model can be combined to generate a digital model of the wheel fan adapted to the aircraft flow path; thus, the present method can make the fan more adapted to the wheel of this aircraft, so that the fan has higher cooling efficiency, better functional performance and higher stability, and therefore, is very suitable for large-scale application and promotion; among them, for example, the present method can be but not limited to running on the aircraft design end side, optionally, the aircraft design end can be but not limited to a personal computer (PC), it can be understood that the aforementioned execution subject does not constitute a limitation on the embodiments of the present application, and accordingly, the operation steps of the present method can be but not limited to the following steps S1 to S6.

[0079] S1. Obtain an initial fan model and a brake cooling channel model of the target aircraft. In this embodiment, the initial fan model can be constructed based on, but not limited to, the distance between the wheel fan and the wheel of the target aircraft and the maximum external dimensions of the wheel fan. At the same time, the aforementioned initial fan model and brake cooling channel model can also be constructed first, and then the aforementioned models are stored in the aircraft design end, and then they can be called when used. Of course, the aforementioned initial fan model and brake cooling channel model can be constructed using commonly used three-dimensional modeling technology, and the principle will not be repeated here.

[0080] After obtaining the initial fan model and the brake cooling channel model of the target aircraft, a fluid simulation model for the wheel fan when dissipating heat can be established based on the two, so as to obtain the initial performance parameters of the wheel fan when it meets the brake cooling requirements based on the fluid simulation model; wherein, the process of determining the initial performance parameters can be but is not limited to as shown in the following step S2.

[0081] S2. Based on the initial fan model and the brake cooling channel model, a fluid simulation model for wheel fan cooling is established, and the fluid simulation model is used to obtain the initial performance parameters of the wheel fan that meet the brake cooling requirements of the target aircraft; in specific implementation, for example, but not limited to, Ansys Fluent can be used to perform corresponding fluid simulations, and during the simulation, the rotation speed of the wheel fan is changed, and then the temperature of the brake device of the target aircraft is observed. In this way, after continuous simulation processing, the initial performance parameters when the brake cooling requirements are met can be determined, that is, the aforementioned initial performance parameters only represent the parameters when the cooling requirements are just met, and are not the optimal performance parameters; of course, the aforementioned brake cooling requirements can be set according to actual use (such as including cooling time, air volume, etc.), and are not specifically limited here.

[0082] Optionally, the aforementioned initial performance parameters may include but are not limited to: fan speed, fan static pressure and fan air volume. Of course, other parameters may also be included, such as fan power, torque, time to complete the cooling task, etc., among which the initial performance parameters can be found in Table 1 below.

[0083] Table 1 shows the performance parameters of the wheel fan when it initially meets the brake heat dissipation requirements.

[0084] Table 1

[0085]

[0086] After obtaining the initial performance parameters of the wheel fan, the structure of the initial fan model can be optimized based on the initial performance parameters, that is, the structural geometric parameters of the wheel fan are determined, and based on this, the model structure is optimized; wherein, the process of determining the structural geometric parameters of the wheel fan can be but is not limited to as shown in the following step S3.

[0087] S3. Determine the structural geometric parameters of the wheel fan based on the initial performance parameters; in specific applications, the fan speed, fan static pressure and fan air volume in the aforementioned initial performance parameters are used as aerodynamic indicators of the wheel fan, and then, based on this, the structural geometric parameters of the wheel fan are determined; wherein, the aforementioned parameter determination process can be, but is not limited to, as shown in the following steps S31 to S34.

[0088] S31. Based on the fan speed, the fan static pressure and the fan air volume, the specific speed of the wheel fan is calculated, and the hub ratio of the wheel fan is determined using the specific speed. In this embodiment, the specific speed of the wheel fan can be calculated by, for example but not limited to, the following formula (1).

[0089] n s =σn·Q b / Pz (1)

[0090] In the above formula (1), n s represents the specific speed of the wheel fan, n represents the fan speed, Q represents the fan air volume, P represents the fan static pressure, and σ, b, and z are all constants; among which, for example, σ, b, and z can be, but are not limited to, 5.54, 1 / 2, and 0.75, respectively.

[0091] After calculating the specific speed of the wheel fan based on the above formula (1), the hub ratio of the wheel fan can be determined based on the specific speed. Since the wheel fan is installed in the wheel axle, the generated air volume will enter the brake device through the ventilation holes on the wheel, and the diameter of the wheel axle is generally around Φ100mm. Therefore, a small hub ratio will only increase the useless work area and reduce the efficiency of the fan. Therefore, when selecting the hub ratio, a larger hub ratio should be selected according to the axle conditions. Specifically, for example, but not limited to, a relationship curve diagram between the fan specific speed and the hub ratio is obtained (the relationship curve diagram can be seen in Figure 2 Then, based on the specific speed of the wheel fan and the relationship curve diagram, the hub ratio of the wheel fan is determined, that is, the specific speed calculated according to formula (1). Figure 2 The hub ratio corresponding to the specific speed is matched; in addition, in this embodiment, the hub ratio is the ratio between the diameter of the main shaft of the wheel fan (that is, the shaft on which the fan blades are installed) and the diameter of the entire fan.

[0092] After the specific speed and hub ratio of the wheel fan are obtained through the aforementioned step S31, the circumferential speed of the wheel fan can be calculated; wherein, the calculation process can be but is not limited to as shown in the following step S32.

[0093] S32. Calculate the circumferential speed of the wheel fan based on the fan speed; in real time, for example, but not limited to, obtain the design parameters of the wheel fan (the design parameters include the outer diameter of the wheel fan, that is, the maximum diameter, which can be pre-set in the aircraft design end); then, calculate the circumferential speed of the wheel fan based on the outer diameter and the fan speed and according to the following formula (2).

[0094]

[0095] In the above formula (2), u represents the circumferential speed, D represents the outer diameter, and n s Indicates the specific speed of the wheel fan.

[0096] In this way, the circumferential speed of the wheel fan can be calculated based on the aforementioned formula (2); then, combined with the aforementioned fan static pressure, the rotational speed change of the wheel fan can be calculated; at the same time, according to the aforementioned calculated hub ratio, the axial speed of the wheel fan can also be determined; optionally, the calculation process of the aforementioned rotational speed change and axial speed can be but is not limited to as shown in the following step S33.

[0097] S33. Calculate the axial speed of the wheel fan using the fan air volume and the hub ratio, and determine the change in the rotational speed of the wheel fan using the circumferential speed and the fan static pressure. In specific implementation, the axial speed may be calculated using, but is not limited to, the following formula (3), and the rotational speed change may be calculated using, for example, the following formula (4).

[0098]

[0099]

[0100] In the above formula (3), c a represents the axial speed of the wheel fan, Q represents the fan air volume, represents the hub ratio; in the above formula (4), Δc u represents the change in rotation speed, P represents the static pressure of the fan, ρ represents the air density (the current air density), and η represents the efficiency of the wheel fan.

[0101] Therefore, based on the aforementioned formula (3) and formula (4), the axial speed and rotational speed change of the wheel fan can be calculated; then, combined with the aforementioned hub ratio and circumferential speed, the structural geometric parameters of the wheel fan can be determined; wherein, the specific determination process of the structural geometric parameters can be but is not limited to as shown in the following step S34.

[0102] S34. Based on the hub ratio, the circumferential speed, the axial speed and the change in rotation speed, the structural geometric parameters of the wheel fan are determined; in specific applications, the hub diameter, the optimal number of blades and the blade installation angle of the wheel fan are determined mainly based on the above four parameters, wherein the above hub diameter, the optimal number of blades and the blade installation angle can be calculated by, for example but not limited to, the following steps S34a to S34f.

[0103] S34a. Obtain design parameters of the wheel fan, wherein the design parameters include an outer diameter of the wheel fan.

[0104] S34b. Calculate the product of the outer diameter of the wheel fan and the hub ratio to obtain the hub diameter of the wheel fan; after calculating the hub diameter of the wheel fan, the optimal number of blades of the fan can be determined based on the hub ratio, and the determination process is shown in the following step S34c.

[0105] S34c. Based on the hub ratio, determine the optimal number of blades for the wheel fan; in this embodiment, for example, it can be but not limited to obtaining a relationship table between the hub ratio and the number of blades; then, based on the hub ratio calculated above, a table lookup and matching is performed in the relationship table to obtain the optimal number of blades for the wheel fan; wherein, the relationship table between the hub ratio and the number of blades can be but not limited to as shown in Table 2 below.

[0106] Table 2 shows the relationship between the hub ratio and the number of blades.

[0107] Table 2

[0108] Hub Ratio 0.3 0.4 0.5 0.6 0.7 Number of blades 2～8 4～6 6～12 8～16 10～20

[0109] In this way, the optimal number of blades for the wheel fan can be determined based on the aforementioned Table 2; and after obtaining the optimal number of blades for the wheel fan, the blade installation angle of the wheel fan must also be calculated; wherein, the specific calculation process of the blade installation angle can be but is not limited to as shown in the following steps S34d and S34e.

[0110] S34d. Calculate the average relative speed of the wheel fan according to the circumferential speed, the axial speed and the change in the rotation speed, and calculate the airflow angle of the wheel fan based on the axial speed and the average relative speed; in specific implementation, the average relative speed of the wheel fan can be calculated according to the following formula (5) for example but not limited to.

[0111]

[0112] In the above formula (5), w m represents the average relative velocity, c a represents the axial speed of the wheel fan, Δc u represents the change in the rotation speed, and u represents the circumferential speed.

[0113] Optionally, after calculating the average relative speed of the wheel fan, the airflow angle of the wheel fan can be calculated in combination with the aforementioned axial speed; wherein, for example, but not limited to, the airflow angle of the wheel fan can be calculated by using the following formula (6);

[0114] β m =sin -1 (c a / w m ) (6)

[0115] In the above formula (6), β m represents the airflow angle.

[0116] After the airflow angle of the wheel fan is calculated by the above formula (5) and formula (6), the blade installation angle of the wheel fan can be determined based on the airflow angle; wherein the above determination process can be but is not limited to as shown in the following step S34e.

[0117] S34e. Determine the blade installation angle of the wheel fan by using the airflow angle; in the present embodiment, for example, but not limited to, first obtain the thickness corresponding to the blade airfoil of the wheel fan; then, based on the thickness corresponding to the blade airfoil of the wheel fan, determine the blade airfoil angle of attack of the wheel fan; then, use the sum of the airflow angle and the blade airfoil angle of attack as the blade installation angle of the wheel fan.

[0118] Furthermore, when determining the angle of attack of the fan blade airfoil, the relationship diagram between different thicknesses of the fan airfoil (the fan airfoil may be a flat-bottom airfoil) and the pressure coefficient and the angle of attack may be obtained first; wherein, the relationship diagram may be found in Figure 3 As shown ( Figure 3 In represents the thickness of the blade airfoil, α represents the angle of attack of the blade airfoil, C y represents the pressure coefficient); then, the corresponding pressure coefficient can be determined based on the corresponding thickness of the blade airfoil of the wheel fan, and based on this, the corresponding blade airfoil angle of attack can be obtained in the relationship diagram.

[0119] After calculating the hub diameter, optimal number of blades and blade installation angle of the wheel fan based on the aforementioned steps S34a to S34e, the aforementioned three parameters can be used to form the structural geometric parameters of the wheel fan, and the process is shown in the following step S34f.

[0120] S34f. The structural geometric parameters are composed by utilizing the hub diameter, optimal number of blades and blade installation angle of the wheel fan.

[0121] Therefore, through the aforementioned steps S34a~S34f, the structural geometric parameters of the wheel fan can be determined; then, the initial fan model can be structurally optimized based on the aforementioned structural geometric parameters; wherein, the structural optimization process can be but is not limited to as shown in the following step S4.

[0122] S4. Based on the structural geometric parameters, the initial fan model is structurally optimized to obtain an optimized wheel-fan model; in specific applications, for example, but not limited to, the design optimization of axial flow blades is performed using a research and development platform based on Concepts NREC to obtain an optimized wheel-fan model.

[0123] After the optimized wheel-fan model is obtained, the optimal performance parameters of the optimized wheel-fan model may be determined, and the process may be but not limited to the following step S5.

[0124] S5. Perform heat dissipation simulation processing on the optimized wheel fan model to obtain the optimal performance parameters of the optimized wheel fan model; in specific applications, before performing heat dissipation simulation processing, the optimized wheel fan model can be simulated and calculated to verify the flow trajectory and static pressure of the fan blades at the set speed to ensure that the basic performance of the blades is higher than that of the initial blades; in this embodiment, the schematic diagram of the simulation effect can be seen in Figure 4 and Figure 5 As shown, Figure 4 Figure (a) shows the pressure distribution cloud diagram of the impeller pressure surface in the optimized turbine fan model, and Figure (b) shows the pressure distribution cloud diagram of the suction surface. Figure 5 It represents the velocity streamline distribution diagram of the optimized wheel-fan model; thus, based on the above simulation diagram, the feasibility of the optimized wheel-fan model can be determined.

[0125] After completing the verification of the optimized wheel-fan model, heat dissipation simulation processing can be performed to obtain the corresponding optimal performance parameters; for example, it can be but not limited to performing Fluent fluid simulation, then observing the temperature change of the brake device, and then adjusting the speed and torque while meeting the design requirements to obtain the state of the fan blades with the highest efficiency. Finally, the performance parameters with the highest heat dissipation efficiency can be used as the optimal performance parameters; optionally, the optimal performance parameters can be but not limited to those shown in Table 3 below.

[0126] Table 3 is the optimal performance parameter table.

[0127] Table 3

[0128]

[0129] After obtaining the optimal performance parameters of the optimized wheel fan model based on the aforementioned step S5, the optimized wheel fan model can be combined to generate a digital model of the wheel fan suitable for the aircraft brake cooling channel; wherein, the construction process of the final model of the wheel fan is shown in the following step S6.

[0130] S6. Generate a digital model of the wheel fan of the target aircraft based on the optimal performance parameters and the optimized wheel fan model; in this embodiment, after constructing the digital model of the wheel fan, the final mechanical shape of the wheel fan can be adjusted according to the actual fan installation position restrictions to obtain a fan model that can be directly used for production and manufacturing; wherein, the fan model for production and manufacturing can be converted into a processing file and transmitted to the fan processing equipment so that the fan processing equipment can process the wheel fan.

[0131] Therefore, through the method for generating the aircraft wheel cooling fan model described in detail in the aforementioned steps S1 to S6, the present invention can optimize the design of the fan structural geometric parameters according to the flow path conditions of different wheels, so that the fan structure can be optimized based on the obtained structural geometric parameters; at the same time, the method also uses simulation processing means to obtain the optimal performance parameters of the fan, and finally, the aforementioned optimized structural model can be combined to generate a digital model of the wheel fan adapted to the aircraft flow path; therefore, the method can make the fan more adapted to the wheel of this aircraft, so that the fan has higher cooling efficiency, better functional performance and higher stability, and is therefore very suitable for large-scale application and promotion.

[0132] like Figure 6 As shown, the second aspect of this embodiment provides a hardware device for implementing the method for generating an aircraft wheel cooling fan model described in the first aspect of the embodiment, including:

[0133] The acquisition unit is used to acquire the initial fan model and the brake cooling channel model of the target aircraft.

[0134] The simulation unit is used to establish a fluid simulation model for wheel fan heat dissipation based on the initial fan model and the brake heat dissipation flow channel model, and use the fluid simulation model to obtain initial performance parameters of the wheel fan that meet the brake heat dissipation requirements of the target aircraft.

[0135] A parameter generating unit is used to determine the structural geometric parameters of the wheel fan according to the initial performance parameters.

[0136] The model optimization unit is used to perform structural optimization on the initial fan model according to the structural geometric parameters to obtain an optimized wheel-fan model.

[0137] The simulation unit is also used to perform heat dissipation simulation processing on the optimized wheel-fan model to obtain the optimal performance parameters of the optimized wheel-fan model.

[0138] The model generation unit is used to generate a digital model of the wheel fan of the target aircraft according to the optimal performance parameters and the optimized wheel fan model.

[0139] The working process, working details and technical effects of the device provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0140] like Figure 7 As shown, the third aspect of this embodiment provides another device for generating an aircraft wheel cooling fan model. Taking the device as an electronic device as an example, the device includes: a memory, a processor and a transceiver that are communicatively connected in sequence, wherein the memory is used to store computer programs, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute the method for generating an aircraft wheel cooling fan model as described in the first aspect of the embodiment.

[0141] For example, the memory may include, but is not limited to, random access memory (RAM), read only memory (ROM), flash memory, first input first output (FIFO) and / or first in last out (FILO), etc. Specifically, the processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). At the same time, the processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state.

[0142] In some embodiments, the processor may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. For example, the processor may not be limited to a microprocessor of the STM32F105 series, a reduced instruction set computer (RISC) microprocessor, an X86 architecture processor, or a processor with an integrated embedded neural network processing unit (NPU); the transceiver may be, but is not limited to, a wireless fidelity (WIFI) wireless transceiver, a Bluetooth wireless transceiver, a general packet radio service technology (General Packet Radio Service, GPRS) wireless transceiver, a ZigBee protocol (a low-power local area network protocol based on the IEEE802.15.4 standard, ZigBee) wireless transceiver, a 3G transceiver, a 4G transceiver and / or a 5G transceiver, etc. In addition, the device may also include, but is not limited to, a power module, a display screen, and other necessary components.

[0143] The working process, working details and technical effects of the electronic device provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0144] A fourth aspect of the present embodiment provides a storage medium storing instructions for the method for generating an aircraft wheel cooling fan model as described in the first aspect of the embodiment, that is, the storage medium stores instructions, and when the instructions are run on a computer, the method for generating an aircraft wheel cooling fan model as described in the first aspect of the embodiment is executed.

[0145] The storage medium refers to a carrier for storing data, which may include but is not limited to a floppy disk, a CD, a hard disk, a flash memory, a USB flash drive and / or a memory stick, and the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0146] The working process, working details and technical effects of the storage medium provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0147] A fifth aspect of the present embodiment provides a computer program product comprising instructions, which, when executed on a computer, causes the computer to execute the method for generating an aircraft wheel cooling fan model as described in the first aspect of the embodiment, wherein the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0148] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for generating an aircraft wheel cooling fan model, characterized in that: include: Obtain the initial fan model and the brake cooling channel model of the target aircraft; Based on the initial fan model and the brake cooling channel model, a fluid simulation model for wheel fan cooling is established, and using the fluid simulation model, initial performance parameters of the wheel fan that meet the brake cooling requirements of the target aircraft are obtained; Determining structural geometric parameters of the wheel fan according to the initial performance parameters; According to the structural geometric parameters, the initial fan model is structurally optimized to obtain an optimized wheel-fan model; Performing heat dissipation simulation processing on the optimized wheel-fan model to obtain optimal performance parameters of the optimized wheel-fan model; A numerical model of the wheel fan of the target aircraft is generated according to the optimal performance parameters and the optimized wheel fan model.

2. The method according to claim 1, characterized in that The initial performance parameters include fan speed, fan static pressure and fan air volume, wherein the structural geometric parameters of the wheel fan are determined based on the initial performance parameters, including: Calculating the specific speed of the wheel fan based on the fan speed, the fan static pressure and the fan air volume, and determining the hub ratio of the wheel fan using the specific speed; Calculating the circumferential speed of the wheel fan according to the fan speed; Calculating the axial speed of the wheel fan using the fan air volume and the hub ratio, and determining the rotation speed change of the wheel fan using the circumferential speed and the fan static pressure; Based on the hub ratio, the circumferential speed, the axial speed and the rotation speed change, the structural geometric parameters of the wheel fan are determined.

3. The method according to claim 2, characterized in that Calculating the specific speed of the wheel fan based on the fan speed, the fan static pressure and the fan air volume includes: The specific speed of the wheel fan is calculated according to the fan speed, the fan static pressure and the fan air volume and in accordance with the following formula (1); n s =σn·Q b P z (1) In the above formula (1), n s represents the specific speed of the wheel fan, n represents the fan speed, Q represents the fan air volume, P represents the fan static pressure, and σ, b, and z are all constants; Correspondingly, determining the hub ratio of the wheel fan by using the specific speed includes: Obtain a curve diagram showing the relationship between the fan specific speed and the hub ratio; Based on the specific speed of the wheel fan and the relationship curve diagram, the hub ratio of the wheel fan is determined.

4. The method according to claim 2, characterized in that: Calculating the circumferential speed of the wheel fan according to the fan speed includes: Acquire design parameters of the wheel fan, wherein the design parameters include an outer diameter of the wheel fan; According to the outer diameter and the fan speed, the circumferential speed of the wheel fan is calculated according to the following formula (2); In the above formula (2), u represents the circumferential speed, D represents the outer diameter, and n represents the fan speed; Correspondingly, the axial speed of the wheel fan is calculated by using the fan air volume and the hub ratio, and the change in the rotation speed of the wheel fan is determined by using the circumferential speed and the fan static pressure, which includes: The axial speed is calculated using the following formula (3), and the rotation speed change is calculated using the following formula (4); In the above formula (3), c a represents the axial speed of the wheel fan, Q represents the fan air volume, and d represents the hub ratio; In the above formula (4), Δc u represents the change in rotation speed, P represents the static pressure of the fan, ρ represents the air density, and η represents the efficiency of the wheel fan.

5. The method according to claim 2, characterized in that: Based on the hub ratio, the circumferential speed, the axial speed and the rotation speed variation, the structural geometric parameters of the wheel fan are obtained, including: Acquire design parameters of the wheel fan, wherein the design parameters include an outer diameter of the wheel fan; Calculating the product of the outer diameter of the wheel fan and the hub ratio to obtain the hub diameter of the wheel fan; Based on the hub ratio, determining an optimal number of blades for the wheel fan; Calculating an average relative speed of the wheel fan according to the circumferential speed, the axial speed and the amount of change in the rotational speed, and calculating an airflow angle of the wheel fan based on the axial speed and the average relative speed; Determining the blade installation angle of the wheel fan by using the airflow angle; The structural geometric parameters are composed of the hub diameter, the optimal number of blades and the blade installation angle of the wheel fan.

6. The method according to claim 5, characterized in that Calculating the average relative speed of the wheel fan according to the circumferential speed, the axial speed and the rotation speed change includes: Based on the circumferential speed, the axial speed and the rotation speed change, and in accordance with the following formula (5), the average relative speed of the wheel fan is calculated; In the above formula (5), w m represents the average relative velocity, c a represents the axial speed of the wheel fan, Δc u represents the change in the rotation speed, and u represents the circumferential speed; Accordingly, based on the axial velocity and the average relative velocity, the airflow angle of the wheel fan is calculated, which includes: According to the following formula (6), the airflow angle of the wheel fan is calculated; b m =sin -1 (c a w m ) (6) In the above formula (6), β m represents the airflow angle.

7. The method according to claim 5, characterized in that Determining the blade profile installation angle of the wheel fan by using the airflow angle includes: Obtaining a thickness corresponding to a blade airfoil of the wheel fan, and determining an angle of attack of the blade airfoil of the wheel fan based on the thickness corresponding to the blade airfoil of the wheel fan; The sum of the airflow angle and the blade airfoil attack angle is used as the blade installation angle of the wheel fan.

8. A device for generating an aircraft wheel cooling fan model, characterized in that: include: An acquisition unit, used for acquiring an initial fan model and a brake cooling channel model of a target aircraft; A simulation unit, for establishing a fluid simulation model for wheel fan heat dissipation based on the initial fan model and the brake heat dissipation flow channel model, and using the fluid simulation model to obtain initial performance parameters of the wheel fan that meet the brake heat dissipation requirements of the target aircraft; A parameter generating unit, used for determining the structural geometric parameters of the wheel fan according to the initial performance parameters; A model optimization unit, configured to perform structural optimization on the initial fan model according to the structural geometric parameters to obtain an optimized wheel-fan model; The simulation unit is further used to perform heat dissipation simulation processing on the optimized wheel-fan model to obtain the optimal performance parameters of the optimized wheel-fan model; The model generation unit is used to generate a digital model of the wheel fan of the target aircraft according to the optimal performance parameters and the optimized wheel fan model.

9. An electronic device, characterized in that: include: A memory, a processor and a transceiver which are sequentially connected in communication, wherein the memory is used to store a computer program, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute the method for generating an aircraft wheel cooling fan model as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores instructions, and when the instructions are executed on a computer, the method for generating an aircraft wheel cooling fan model according to any one of claims 1 to 7 is executed.

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