Fan performance determination method and device, storage medium and equipment

Abstract

The invention provides a draught fan performance determination method and device, a storage medium and equipment, the method is applied to the pneumatic field, and the method comprises the steps that the gas flow and the total pressure of gas at an outlet of a draught fan are obtained, and meanwhile the input power of the draught fan and the maximum pressure borne by the surface of a volute of the draught fan are obtained; determining a first constant representing aerodynamic efficiency of the fan based on the gas flow, the total pressure and the input power, determining a second constant representing noise generated by the fan based on the total pressure and the maximum pressure, and determining performance parameters of the fan based on the first constant and the second constant. According to the method, the performance of the fan in the pneumatic equipment can be determined in a steady simulation mode, massive calculation is not needed, and the calculation time and the design period of the fan are shortened.

Description

Technical Field

[0001] This application relates to the field of wind power, and more specifically, to a method, apparatus, storage medium, and device for determining the performance of a wind turbine in the field of wind power. Background Technology

[0002] As a type of fan-driven device, the range hood collects and exhausts cooking fumes, making it an indispensable appliance in the kitchen. Designing the fan system of a range hood typically requires simulation tools, which not only demands significant computational resources and time but also fails to meet accuracy requirements and cannot be used to study the noise performance of the fan system. Summary of the Invention

[0003] This application provides a method, apparatus, storage medium, and equipment for determining the performance of a wind turbine. This method can determine the performance of a wind turbine in a wind-driven device through steady-state simulation, without the need for extensive calculations, thus shortening the calculation time and the design cycle of the wind turbine.

[0004] In a first aspect, a method for determining the performance of a fan is provided, applied to a pneumatic device. The pneumatic device includes a fan, which includes a volute casing with an air outlet and an air inlet. A motor and an impeller are disposed inside the volute casing, and the motor and impeller are connected to drive the impeller to rotate to generate airflow. The method includes: acquiring the gas flow rate and total gas pressure at the air outlet; acquiring the input power of the fan; and acquiring the maximum pressure borne by the surface of the volute casing; determining a first constant characterizing the aerodynamic efficiency of the fan based on the gas flow rate, total pressure, and input power; determining a second constant characterizing the noise generated by the fan based on the total pressure and the maximum pressure; and determining the performance parameters of the fan based on the first and second constants.

[0005] The above technical solution obtains the gas flow rate and total gas pressure at the fan outlet, as well as the fan's input power and the maximum pressure exerted on the fan's volute surface. Based on the gas flow rate, total pressure, and input power, a first constant characterizing the fan's aerodynamic efficiency is determined. Based on the total pressure and maximum pressure, a second constant characterizing the noise generated by the fan is determined. Based on the first and second constants, the fan's performance parameters are determined. Determining the fan performance in wind-driven equipment through steady-state simulation eliminates the need for extensive calculations, shortening computation time and the fan's design cycle.

[0006] In conjunction with the first aspect, in some possible implementations, the step of obtaining the gas flow rate and total gas pressure at the outlet includes: obtaining the gas flow rate, gas density, and gas velocity at the outlet; and determining the total gas pressure at the outlet based on the gas density and gas velocity.

[0007] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the step of obtaining the gas flow rate, gas density and gas velocity at the outlet includes: obtaining the gas flow rate and gas density at the outlet; and determining the gas velocity at the outlet based on the gas flow rate, the impeller diameter and the impeller height.

[0008] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the step of determining the gas velocity at the outlet based on the gas flow rate, the impeller diameter, and the impeller height includes: determining the flow area that the gas passes through when it passes through the outlet based on the product of the impeller diameter and the impeller height; and determining the ratio of the gas flow rate to the flow area as the gas velocity at the outlet.

[0009] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the step of obtaining the input power of the fan includes: obtaining the impeller speed and shaft torque of the impeller; and determining the input power of the fan based on the impeller speed and shaft torque.

[0010] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the step of determining a first constant characterizing the aerodynamic efficiency of the fan based on gas flow rate, total pressure and input power includes: determining the product of gas flow rate and total pressure as the output power of the fan; and determining the ratio of output power to input power as the first constant characterizing the aerodynamic efficiency of the fan.

[0011] In combination with the first aspect and the above implementation, in some possible implementations, the step of determining the second constant characterizing the noise generated by the fan based on the total pressure and the maximum pressure includes: determining the ratio of the total pressure to the maximum pressure as the second constant characterizing the noise generated by the fan.

[0012] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the step of determining the performance parameters of the wind turbine based on the first constant and the second constant includes: determining the product of the first constant and the second constant as the performance parameters of the wind turbine.

[0013] Combining the first aspect and the above implementation methods, in some possible implementation methods, the fan is a centrifugal fan.

[0014] Secondly, a wind turbine performance determination device is provided, the device comprising:

[0015] The acquisition unit is used to acquire the gas flow rate and total gas pressure at the outlet, acquire the input power of the fan, and acquire the maximum pressure borne by the surface of the volute.

[0016] The first constant determination unit is used to determine the first constant characterizing the aerodynamic efficiency of the fan based on the gas flow rate, total pressure, and input power.

[0017] The second constant determination unit is used to determine a second constant characterizing the noise generated by the fan based on the total pressure and the maximum pressure.

[0018] The performance parameter determination unit is used to determine the performance parameters of the wind turbine based on a first constant and a second constant.

[0019] Thirdly, a wind-powered device is provided, the wind-powered device comprising: a memory for storing executable program code;

[0020] A processor for calling and running executable program code from memory to perform the methods in the first aspect or any possible implementation of the first aspect described above.

[0021] Fourthly, a computer program product is provided, comprising: computer program code, which, when run on a computer, causes the computer to perform the methods described in the first aspect or any possible implementation thereof.

[0022] Fifthly, a computer-readable storage medium is provided that stores computer program code, which, when executed on a computer, causes the computer to perform the methods described in the first aspect or any possible implementation thereof. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a scenario for a method for determining wind turbine performance provided in an embodiment of this application;

[0024] Figure 2 This is a flowchart illustrating a method for determining wind turbine performance provided in an embodiment of this application;

[0025] Figure 3 This is a flowchart illustrating a method for determining wind turbine performance provided in an embodiment of this application;

[0026] Figure 4 This is an example schematic diagram of a fan provided in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of a fan performance determination device provided in an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the structure of a pneumatic device provided in an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the structure of a pneumatic device provided in an embodiment of this application. Detailed Implementation

[0030] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0031] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0032] Please see Figure 1 , Figure 1 This is a schematic diagram illustrating a scenario for a method of determining wind turbine performance provided in an embodiment of this application. For example... Figure 1 As shown in the embodiments of this application, the fan performance determination method can be applied to pneumatic equipment, such as range hoods, which use fans to draw in and expel gas. During the fan design process, the gas flow rate and total gas pressure at the fan outlet are obtained, along with the fan's input power and the maximum pressure borne by the fan's volute surface. Based on the gas flow rate, total pressure, and input power, a first constant characterizing the fan's aerodynamic efficiency is determined. Based on the total pressure and maximum pressure, a second constant characterizing the noise generated by the fan is determined. Based on the first and second constants, the fan's performance parameters are determined. By determining the fan performance in pneumatic equipment through steady-state simulation, extensive calculations are eliminated, shortening the computation time and the fan design cycle.

[0033] based on Figure 1 The scene diagram shown below will be combined with... Figures 2-4 The method for determining the performance of a wind turbine provided in the embodiments of this application will be described in detail.

[0034] Please see Figure 2 , Figure 2 This is a flowchart illustrating a method for determining wind turbine performance provided in an embodiment of this application. Figure 2 As shown, the method in this application embodiment may include the following steps S101-S104.

[0035] S101, obtain the gas flow rate and total gas pressure at the outlet, obtain the input power of the fan, and obtain the maximum pressure that the surface of the volute can withstand;

[0036] Specifically, the fan performance determination method provided in this application embodiment can be applied to pneumatic equipment, which includes a fan, a volute, an air outlet and an air inlet on the volute, and a motor and an impeller inside the volute. The motor drives the impeller to rotate to generate airflow. Specifically, the impeller rotation draws in gas through the air inlet and discharges gas through the air outlet. When the gas flows inside the volute, it causes impact and friction on the volute, increasing the pressure on the surface of the volute. This application embodiment needs to obtain the gas flow rate and total gas pressure at the fan's air outlet, as well as the fan's input power and the maximum pressure on the surface of the fan's volute.

[0037] Among them, the gas flow rate from the outlet is the amount of gas discharged from the outlet per unit time. Since the gas is always in motion when the impeller rotates, the total pressure of the gas is the dynamic pressure of the gas. Dynamic pressure is the additional pressure generated on the surface of the volute by the gas molecules due to their velocity when the gas is in motion.

[0038] S102, based on gas flow rate, total pressure and input power, determine the first constant characterizing the aerodynamic efficiency of the fan;

[0039] Specifically, the energy in the motor is transferred to the impeller in the form of shaft work, which in turn drives the airflow. However, shaft work cannot be completely converted into the mechanical energy of the gas; some shaft work is converted into heat energy through internal friction of the gas or transmitted in the form of sound waves. Therefore, during the operation of the fan, apart from the noise and abnormal sounds generated by the motor, the remaining noise all comes from the portion of the shaft work that is not utilized by the gas. That is, the higher the aerodynamic efficiency of the fan, the lower the upper limit of noise. A first constant characterizing the aerodynamic efficiency of the fan is determined based on the gas flow rate, total pressure, and input power. The larger the first constant, the lower the noise. Among them, the output power of the fan can be obtained from the gas flow rate and total pressure, and then the aerodynamic efficiency of the fan can be determined from the output power and input power.

[0040] S103, based on the total pressure and the maximum pressure, determines the second constant characterizing the noise generated by the fan;

[0041] Specifically, in general pneumatic equipment, the noise level of the fan can be judged based on the pressure distribution on the surface of the volute. Specifically, based on the total gas pressure and the maximum pressure borne by the volute surface, a second constant characterizing the noise generated by the fan is determined.

[0042] S104, based on the first and second constants, determine the performance parameters of the wind turbine.

[0043] Specifically, the performance parameters of the fan are defined as the product of a first constant and a second constant. Based on the first constant and the second constant, the performance parameters of the fan can be determined. In the design process of the fan, this helps the R&D personnel find the optimal performance parameters that can balance the aerodynamic efficiency and the noise generated by the fan.

[0044] In this embodiment, the gas flow rate and total gas pressure at the fan outlet are obtained, along with the fan's input power and the maximum pressure exerted on the fan's volute surface. Based on the gas flow rate, total pressure, and input power, a first constant characterizing the fan's aerodynamic efficiency is determined. Based on the total pressure and maximum pressure, a second constant characterizing the noise generated by the fan is determined. Based on the first and second constants, the fan's performance parameters are determined. Determining the fan performance in the pneumatic equipment through steady-state simulation eliminates the need for extensive calculations, shortening computation time and the fan's design cycle.

[0045] Please see Figure 3 , Figure 3 This is a flowchart illustrating a method for determining wind turbine performance provided in an embodiment of this application. Figure 3 As shown, the method in this application embodiment may include the following steps S201-S206.

[0046] S201, obtain the gas flow rate, gas density and gas velocity at the gas outlet, and determine the total pressure of the gas at the gas outlet based on the gas density and gas velocity;

[0047] Specifically, the fan performance determination method provided in this application embodiment can be applied to pneumatic equipment, which includes a centrifugal fan. The fan includes a volute with an outlet and an inlet. A motor and an impeller are housed inside the volute, connected to each other. The motor drives the impeller to rotate, generating airflow. Specifically, the impeller rotation draws in gas through the inlet and discharges gas through the outlet. As the gas flows within the volute, it impacts and rubs against the volute, increasing the pressure on its surface. A flow meter and a gas flow sensor can be placed at the outlet to obtain the gas flow rate. The gas flow rate at the outlet is the amount of gas discharged per unit time, and the gas density is known. Based on the gas flow rate, the impeller diameter, and the impeller height, the gas velocity at the outlet is determined. Specifically, the flow area traversed by the gas as it passes through the outlet is determined by multiplying the impeller diameter and impeller height. The ratio of the gas flow rate to the flow area is then determined as the gas velocity at the outlet. Since the gas is in constant motion when the impeller rotates, the total pressure of the gas is called the dynamic pressure of the gas. Dynamic pressure is the additional pressure exerted on the surface of the volute by the gas molecules due to their velocity when the gas is in motion.

[0048] For example, if the fan is a multi-bladed centrifugal fan, the flow area of ​​the gas at the outlet is the lateral surface area of ​​the cylinder. Assuming the gas flow rate is Q, the gas density is ρ, the impeller diameter is D, the impeller height is h, and the gas velocity is v, then...

[0049]

[0050] The total pressure of the gas is p. According to Bernoulli's equation,

[0051]

[0052] Please see Figure 4 , Figure 4 This is an example schematic diagram of a fan provided in an embodiment of this application. For example... Figure 4 As shown, the fan 4 includes an air inlet 41, an air outlet 42, and an impeller 43. The impeller 43 draws gas into the air inlet 41 by rotating and then discharges it from the air outlet 42.

[0053] S202, obtain the impeller speed and shaft torque, and determine the input power of the fan based on the impeller speed and shaft torque;

[0054] Specifically, the impeller speed and shaft torque of the fan are obtained, and the input power of the fan is determined based on these parameters. In physics, power is the scalar product of force and velocity, where velocity is the component along the direction of the force. Based on this, in rotating machinery, such as fans, the input power of the fan can be determined by the product of the impeller speed and the shaft torque.

[0055] If the impeller speed is ω, the shaft torque is T, and the input power is P shaft ,but

[0056] P shaft =ωT.

[0057] S203, obtain the maximum pressure that the surface of the volute can withstand;

[0058] Specifically, pressure sensors can be installed at different locations on the surface of the fan casing to ensure that the maximum pressure on the surface of the casing can be directly obtained. Numerical simulation of the internal flow field of the fan can also be performed. By solving the fluid dynamics equations, the pressure distribution map on the surface of the casing can be obtained, thereby obtaining the maximum pressure on the surface of the casing.

[0059] S204, the product of gas flow rate and total pressure is determined as the output power of the fan, and the ratio of output power to input power is determined as the first constant characterizing the aerodynamic efficiency of the fan;

[0060] Specifically, the energy in the motor is transferred to the impeller in the form of shaft work, which in turn drives the airflow. However, shaft work cannot be completely converted into the mechanical energy of the gas; some shaft work is converted into heat energy through internal friction of the gas or transmitted in the form of sound waves. Therefore, during the operation of the fan, apart from the noise and abnormal sounds generated by the motor, the remaining noise all comes from the portion of the shaft work that is not utilized by the gas. That is, the higher the aerodynamic efficiency of the fan, the lower the upper limit of noise. Therefore, a first constant characterizing the aerodynamic efficiency of the fan can be determined based on the output power and input power. The larger the first constant, the lower the noise. Since the output power is related to the gas flow rate and the total pressure, the product of the gas flow rate and the total pressure is determined as the output power of the fan, and the ratio of the output power to the input power is determined as the first constant characterizing the aerodynamic efficiency of the fan.

[0061] If the first constant is k1, then according to steps S201 and S202, we can obtain:

[0062]

[0063] S205 defines the ratio of total pressure to maximum pressure as the second constant characterizing the noise generated by the fan;

[0064] Specifically, based on the acoustic analogy (FW-H) equations

[0065]

[0066] It is known that noise sources during gas movement include quadrupole sound sources, dipole sound sources, and monopole sound sources. Quadrupole sound sources are related to unsteady flow effects in the gas, particularly unsteady changes in gas acceleration. However, for the gas flow involved in the pneumatic equipment provided in this embodiment, the gas flow is not unsteady, with a Mach number less than 0.1. Therefore, the quadrupole sound source term can usually be ignored. The Mach number is the ratio of the local flow velocity at a point in the gas to the sound velocity at that point. Monopole sound sources are generated by the flow field being cut by a wall. However, the fan in the pneumatic equipment provided in this embodiment is a fixed wall. Due to viscosity, v i =0, and the impeller in the fan is generally made of sheet metal, with the velocity vector v of the windward and leeward sides of the blades. i Approximately identical, but Since the terms are equal in magnitude and opposite in direction, this term is approximately 0. Therefore, the monopole sound source term can also be ignored. Thus, the dipole sound source term can ultimately be considered the noise source in the wind-driven equipment. The dipole sound source term is a force-driven sound source, and the sound waves it generates are related to the unsteady forces in the gas. If we assume that the dipole sound source term is proportional to the total gas pressure, we can determine the noise level of the fan based on the pressure distribution on the volute surface. Specifically, the ratio of the total gas pressure to the maximum pressure borne by the volute surface is determined as the second constant characterizing the noise generated by the fan.

[0067] If the total pressure of the gas is p, then the maximum pressure exerted on the surface of the volute is p. max If the second constant is k2, then according to step S201, we can obtain:

[0068]

[0069] S206, the product of the first constant and the second constant is determined as the performance parameter of the wind turbine.

[0070] Specifically, the performance parameters of a fan include its aerodynamic efficiency and the noise it generates. Therefore, the product of the first constant and the second constant can be used to determine the fan's performance parameters. This helps researchers find the optimal performance parameters that balance the aerodynamic efficiency and the noise generated by the fan during the fan design process.

[0071] In this embodiment, by acquiring the gas flow rate, gas density, and gas velocity at the fan outlet, the total gas pressure at the outlet can be determined based on the gas density and gas velocity. Simultaneously, the impeller speed and axial torque of the fan can also be acquired. Based on the impeller speed and axial torque, the fan's input power is determined. The product of the gas flow rate and the total pressure is determined as the fan's output power. The ratio of output power to input power is determined as a first constant characterizing the fan's aerodynamic efficiency. When determining the second constant, the maximum pressure borne by the volute surface is acquired, and the ratio of total pressure to the maximum pressure is determined as a second constant characterizing the noise generated by the fan. Finally, the product of the first and second constants is determined as the fan's performance parameters. Determining the fan performance in the wind-driven equipment through steady-state simulation eliminates the need for extensive calculations, shortening the computation time and fan design cycle. In this embodiment, all sub-parameters used in calculating the fan's performance parameters can be directly obtained, reducing the operational complexity of the simulation process.

[0072] based on Figure 1 The following is a scene illustration, which will be combined with... Figure 5 This application provides a detailed description of the fan performance determination device provided in its embodiments. It should be noted that... Figure 5 The wind turbine performance determination device in the present application is used to perform the following tasks. Figures 2-4The methods shown in the embodiments are for illustrative purposes only, illustrating the parts relevant to the embodiments of this application. For specific technical details not disclosed, please refer to this application. Figures 2-4 The example shown.

[0073] Please see Figure 5 , Figure 5 This is a schematic diagram of a fan performance determination device provided in an embodiment of this application. Figure 5 As shown, the wind turbine performance determination device 1 in this application embodiment may include: an acquisition unit 11, a first constant determination unit 12, a second constant determination unit 13, and a performance parameter determination unit 14.

[0074] The acquisition unit 11 is used to acquire the gas flow rate and total gas pressure at the outlet, acquire the input power of the fan, and acquire the maximum pressure borne by the surface of the volute.

[0075] The first constant determination unit 12 is used to determine a first constant characterizing the aerodynamic efficiency of the fan based on the gas flow rate, total pressure, and input power.

[0076] The second constant determination unit 13 is used to determine a second constant characterizing the noise generated by the fan based on the total pressure and the maximum pressure.

[0077] The performance parameter determination unit 14 is used to determine the performance parameters of the fan based on the first constant and the second constant.

[0078] Optionally, the acquisition unit 11 is specifically used to acquire the gas flow rate, gas density, and gas velocity at the gas outlet;

[0079] The total pressure of the gas at the outlet is determined based on the gas density and gas flow rate.

[0080] Optionally, the acquisition unit 11 is specifically used to acquire the gas flow rate and gas density at the gas outlet;

[0081] The gas velocity at the outlet is determined based on the gas flow rate, impeller diameter, and impeller height.

[0082] Optionally, the acquisition unit 11 is specifically used to determine the flow area that the gas passes through when it passes through the outlet based on the product of the impeller diameter and the impeller height.

[0083] The ratio of gas flow rate to flow area is defined as the gas velocity at the outlet.

[0084] Optionally, the acquisition unit 11 is specifically used to acquire the impeller speed and shaft torque of the impeller;

[0085] The input power of the fan is determined based on the impeller speed and axial torque.

[0086] Optionally, the first constant determining unit 12 is specifically used to determine the product of gas flow rate and total pressure as the output power of the fan;

[0087] The ratio of output power to input power is defined as the first constant characterizing the aerodynamic efficiency of the fan.

[0088] Optionally, the second constant is determined 13 specifically for determining the ratio of total pressure to maximum pressure as a second constant characterizing the noise generated by the fan.

[0089] Optionally, the performance parameter determination unit 14 is specifically used to determine the product of the first constant and the second constant as the performance parameters of the wind turbine.

[0090] Optionally, the fan in the fan performance determination device 1 is a centrifugal fan.

[0091] In this embodiment, by acquiring the gas flow rate, gas density, and gas velocity at the fan outlet, the total gas pressure at the outlet can be determined based on the gas density and gas velocity. Simultaneously, the impeller speed and axial torque of the fan can also be acquired. Based on the impeller speed and axial torque, the fan's input power is determined. The product of the gas flow rate and the total pressure is determined as the fan's output power. The ratio of output power to input power is determined as a first constant characterizing the fan's aerodynamic efficiency. When determining the second constant, the maximum pressure borne by the volute surface is acquired, and the ratio of total pressure to the maximum pressure is determined as a second constant characterizing the noise generated by the fan. Finally, the product of the first and second constants is determined as the fan's performance parameters. Determining the fan performance in the wind-driven equipment through steady-state simulation eliminates the need for extensive calculations, shortening the computation time and fan design cycle. In this embodiment, all sub-parameters used in calculating the fan's performance parameters can be directly obtained, reducing the operational complexity of the simulation process.

[0092] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a pneumatic device provided in an embodiment of this application.

[0093] For example, such as Figure 6 As shown, the wind-powered device 600 includes a processor 601 and a memory 602, wherein the processor 601 and the memory 602 are electrically connected.

[0094] The processor 601 is the control center of the wind turbine 600 and may include one or more processing cores. The processor 601 connects to various parts of the wind turbine through various interfaces and lines. By running or calling computer programs stored in the memory 602, and by calling data stored in the memory 602, it executes various functions of the wind turbine and processes data, thereby providing overall control of the wind turbine 600. Optionally, the processor 601 may be implemented using at least one of the following hardware forms: Digital Signal Processing (DSP), Field Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 601 may integrate one or more of the following: CPU, Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user page, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor 601 and may be implemented separately through a communication chip.

[0095] The memory 602 can be used to store software programs and modules. The processor 601 executes various functional applications and data processing by running the computer programs and modules stored in the memory 602. The memory 602 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, computer programs required for at least one function, etc.; the data storage area may store data created based on the use of the wind turbine 600, etc.

[0096] Furthermore, memory 602 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory 602 may also include a memory controller to provide processor 601 with access to memory 602.

[0097] In this embodiment, the processor 601 in the wind-powered device 600 loads the instructions corresponding to the processes of one or more computer programs into the memory 602 according to the following steps, and the processor 601 runs the computer programs stored in the memory 602 to realize various functions, as follows:

[0098] Obtain the gas flow rate and total gas pressure at the outlet, obtain the input power of the fan, and obtain the maximum pressure that the surface of the volute can withstand.

[0099] Based on gas flow rate, total pressure, and input power, a first constant characterizing the aerodynamic efficiency of the fan is determined;

[0100] Based on the total pressure and the maximum pressure, a second constant characterizing the noise generated by the fan is determined;

[0101] The performance parameters of the wind turbine are determined based on the first and second constants.

[0102] Optionally, when the processor 601 obtains the gas flow rate and total gas pressure at the outlet, it specifically performs the following:

[0103] Obtain the gas flow rate, gas density, and gas velocity at the gas outlet;

[0104] The total pressure of the gas at the outlet is determined based on the gas density and gas flow rate.

[0105] Optionally, when the processor 601 executes the process of acquiring the gas flow rate, gas density, and gas velocity at the outlet, it specifically performs the following:

[0106] Obtain the gas flow rate and gas density at the outlet;

[0107] The gas velocity at the outlet is determined based on the gas flow rate, impeller diameter, and impeller height.

[0108] Optionally, when the processor 601 determines the gas velocity at the outlet based on the gas flow rate, impeller diameter, and impeller height, it specifically performs the following:

[0109] The flow area that the gas passes through when it passes through the outlet is determined by the product of the impeller diameter and the impeller height.

[0110] The ratio of gas flow rate to flow area is defined as the gas velocity at the outlet.

[0111] Optionally, when the processor 601 executes the process of obtaining the input power of the wind turbine, it specifically performs the following:

[0112] Obtain the impeller speed and shaft torque;

[0113] The input power of the fan is determined based on the impeller speed and axial torque.

[0114] Optionally, when processor 601 executes the process of determining the first constant characterizing the aerodynamic efficiency of the fan based on gas flow rate, total pressure, and input power, it specifically performs the following:

[0115] The product of gas flow rate and total pressure is used to determine the output power of the fan;

[0116] The ratio of output power to input power is defined as the first constant characterizing the aerodynamic efficiency of the fan.

[0117] Optionally, when processor 601 executes the process of determining a second constant characterizing the noise generated by the fan based on the total pressure and the maximum pressure, it specifically performs the following:

[0118] The ratio of total pressure to maximum pressure is determined as the second constant characterizing the noise generated by the fan.

[0119] Optionally, when the processor 601 determines the performance parameters of the wind turbine based on the first and second constants, it specifically performs the following:

[0120] The product of the first constant and the second constant is determined as the performance parameter of the wind turbine.

[0121] Optionally, when the processor 601 executes the above method, the fan is a centrifugal fan.

[0122] In this embodiment, by acquiring the gas flow rate, gas density, and gas velocity at the fan outlet, the total gas pressure at the outlet can be determined based on the gas density and gas velocity. Simultaneously, the impeller speed and axial torque of the fan can also be acquired. Based on the impeller speed and axial torque, the fan's input power is determined. The product of the gas flow rate and the total pressure is determined as the fan's output power. The ratio of output power to input power is determined as a first constant characterizing the fan's aerodynamic efficiency. When determining the second constant, the maximum pressure borne by the volute surface is acquired, and the ratio of total pressure to the maximum pressure is determined as a second constant characterizing the noise generated by the fan. Finally, the product of the first and second constants is determined as the fan's performance parameters. Determining the fan performance in the wind-driven equipment through steady-state simulation eliminates the need for extensive calculations, shortening the computation time and fan design cycle. In this embodiment, all sub-parameters used in calculating the fan's performance parameters can be directly obtained, reducing the operational complexity of the simulation process.

[0123] Please see Figure 7 , Figure 7 This is a structural schematic diagram of a pneumatic device provided in an embodiment of this application. For example... Figure 7 As shown, the wind-powered device 600 includes: a processor 601, a memory 602, a display screen 603, a sensor 604, and a power supply 605. The processor 601 is electrically connected to the display screen 603, the sensor 604, and the power supply 605.

[0124] The display screen 603 can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the wind-powered device 600, which can be composed of images, text, icons, videos, and any combination thereof.

[0125] Sensor 604 is used to collect information about the wind-powered equipment 600 itself or about the external environment. For example, sensor 606 may include a vibration sensor.

[0126] The power supply 605 is used to supply power to the various components of the wind-powered device 600. In some embodiments, the power supply 605 can be logically connected to the processor 601 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system.

[0127] It should be understood that the apparatus provided in this application embodiment is used to perform the above-described method for determining wind turbine performance, and therefore can achieve the same effect as the above-described implementation method.

[0128] When using integrated units, the device may include a processing module and a storage module. Specifically, when the device is applied to wind-powered equipment, the processing module can be used to control and manage the operation of the wind-powered equipment. The storage module can be used to support the wind-powered equipment in executing relevant program code.

[0129] The processing module may be a processor or a controller, which can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of functions that implement computing capabilities, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc., and the storage module may be a memory.

[0130] In addition, the device provided in this application embodiment may specifically be a chip, component or module. The chip may include a connected processor and a memory. The memory is used to store instructions. When the processor calls and executes the instructions, the chip can execute a wind turbine performance determination method provided in the above embodiment.

[0131] This application also provides a computer-readable storage medium storing computer program code. When the computer program code is run on a computer, the computer executes the above-described related method steps to implement the wind turbine performance determination method provided in the above embodiments.

[0132] This embodiment also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned steps to implement the wind turbine performance determination method provided in the above embodiment.

[0133] In this embodiment, the device, computer-readable storage medium, computer program product, or chip are all used to execute the corresponding methods provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0134] Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0135] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0136] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of determining performance of a fan, the method comprising: The method is applied to a pneumatic device, and the pneumatic device comprises a fan, the fan comprises a volute, the volute is provided with an air outlet and an air inlet, a motor and an impeller are arranged in the volute, the motor is connected with the impeller and used for driving the impeller to rotate to generate airflow, and the method comprises the following steps: obtaining the gas flow rate and the total pressure of the gas at the air outlet, obtaining the input power of the fan, and obtaining the maximum pressure borne by the surface of the volute; determining a first constant representing the aerodynamic efficiency of the fan based on the gas flow rate, the total pressure and the input power; determining a second constant representing the noise generated by the fan based on the total pressure and the maximum pressure; determining the performance parameter of the fan based on the first constant and the second constant.

2. The method of claim 1, wherein, The method comprises the following steps: obtaining the gas flow rate, the gas density and the gas flow velocity at the air outlet; determining the total pressure of the gas at the air outlet according to the gas density and the gas flow velocity.

3. The method of claim 2, wherein, The method comprises the following steps: obtaining the gas flow rate and the gas density at the air outlet; determining the gas flow velocity at the air outlet based on the gas flow rate, the impeller diameter and the impeller height of the impeller.

4. The method of claim 3, wherein, The method comprises the following steps: determining the flow area through which the gas passes when passing through the air outlet based on the product of the impeller diameter and the impeller height of the impeller; determining the gas flow velocity at the air outlet as the ratio of the gas flow rate to the flow area.

5. The method of claim 1, wherein, The method comprises the following steps: obtaining the impeller rotating speed and the shaft torque of the impeller; determining the input power of the fan based on the impeller rotating speed and the shaft torque.

6. The method of claim 1, wherein, The method comprises the following steps: determining the output power of the fan as the product of the gas flow rate and the total pressure; determining the first constant representing the aerodynamic efficiency of the fan as the ratio of the output power to the input power.

7. The method of claim 1, wherein, The method comprises the following steps: determining the second constant representing the noise generated by the fan as the ratio of the total pressure to the maximum pressure.

8. The method of claim 1, wherein, The method comprises the following steps: determining the performance parameter of the fan as the product of the first constant and the second constant.

9. The method according to any one of claims 1 to 8, characterized in that, The fan is a centrifugal fan.

10. A fan performance determination apparatus characterized by comprising: The device comprises: an obtaining unit, which is used for obtaining the gas flow rate and the total pressure of the gas at the air outlet, obtaining the input power of the fan, and obtaining the maximum pressure borne by the surface of the volute; a first constant determining unit, which is used for determining a first constant representing the aerodynamic efficiency of the fan based on the gas flow rate, the total pressure and the input power; a second constant determination unit configured to determine a second constant representing noise generated by the fan based on the total pressure and the maximum pressure; a performance parameter determination unit configured to determine a performance parameter of the fan based on the first constant and the second constant.

11. A wind powered apparatus, characterized by The air moving device comprises: a memory configured to store executable program code; a processor configured to call and run the executable program code from the memory, so that the range hood executes the method according to any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer program code, when the computer program code is executed, the method according to any one of claims 1 to 9 is realized. The computer readable storage medium stores computer program code, when the computer program code is executed, the method according to any one of claims 1 to 9 is realized.

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