Resistance type vertical axis wind turbine blade design method and resistance type vertical axis wind turbine

Abstract

The invention relates to the technical field of electronics, and discloses a resistance type vertical axis wind turbine blade design method and a resistance type vertical axis wind turbine, according to the method, blade airfoil parameters of the resistance type vertical axis wind turbine are determined on the basis of a pre-constructed first airfoil equation, and an airfoil curve is constructed on the basis of a parabolic equation; and blade design of the resistance type vertical axis wind turbine is carried out based on the blade airfoil parameters. According to the method provided by the invention, the blade airfoil parameters of the resistance type vertical axis wind turbine are determined through the pre-constructed first airfoil equation, the blade design of the resistance type vertical axis wind turbine is carried out based on the blade airfoil parameters, and the blade formed by the parabola airfoil is obtained; the resistance coefficient of the blade formed by the parabola airfoil is larger than that of a traditional semicircular wind turbine blade, and the wind energy utilization rate of the resistance type vertical axis wind turbine can be effectively increased by adjusting the blade of the resistance type vertical axis wind turbine to be the blade formed based on the parabola airfoil.

Description

Technical Field

[0001] The invention relates to the field of electronic technology, and in particular to a design method for a resistance-type vertical-axis wind turbine blade and a resistance-type vertical-axis wind turbine. Background Art

[0002] A vertical axis wind turbine has a wind energy conversion device that relies on resistance to do work, and has the advantages of high self-starting performance and low noise at any wind speed. Therefore, as a small wind turbine, it will become the best choice for off-grid wind energy utilization in cities and remote areas. Despite its many advantages, the energy conversion efficiency of the Savonius wind turbine (a resistance-type vertical axis wind turbine) is lower than that of other forms of wind turbines. Therefore, designing a vertical axis wind turbine with high conversion efficiency is of great significance to expanding the market share of such wind turbines and promoting wind energy utilization.

[0003] The resistance type vertical axis Savonius wind turbine generally consists of two or more semi-cylindrical blades. The two semi-cylindrical blades are symmetrically installed on both sides of the shaft, with opposite cylinders and an S shape, such as Figure 1 As shown. When the wind blows towards the blades, the wind resistance of the blades facing the concave surface is greater than that of the blades facing the convex surface. The resistance difference on both sides (F>F') can make the rotor rotate. The resistance difference between two blades in the front wind direction is generally 3 to 4 times, and the resistance difference of six blades is generally about 2 to 3 times. The resistance difference of the wind cups on both sides will make the wind wheel rotate. The radial section of the wind turbine blade is called an airfoil. The blades of a resistance-type vertical axis wind turbine use aerodynamic principles to convert the acquired wind energy into mechanical energy to drive the generator to generate electricity. Among them, the wind wheel is mainly driven by the airflow through the airfoil to generate resistance. Obviously, the aerodynamic performance of the blade depends on the airfoil. And because of the different geometric characteristic parameters between airfoils, the corresponding aerodynamic performance will also be very different. In the related art, semi-cylindrical blades are generally used, and blades with other geometric characteristics are not considered to improve the aerodynamic performance of the blades, resulting in a low wind energy utilization rate of the designed vertical axis wind turbine. Summary of the invention

[0004] In view of this, the present invention provides a method for designing blades of a resistance-type vertical axis wind turbine and a resistance-type vertical axis wind turbine, so as to solve the problem that semi-cylindrical blades are used without considering the use of blades with other geometric features to improve the aerodynamic performance of the blades, resulting in a low wind energy utilization rate of the designed vertical axis wind turbine.

[0005] In a first aspect, the present invention provides a method for designing blades of a resistance-type vertical axis wind turbine, the method comprising: determining blade airfoil parameters of the resistance-type vertical axis wind turbine based on a pre-constructed first airfoil equation, wherein the first airfoil curve is constructed based on a parabolic equation; and designing blades of the resistance-type vertical axis wind turbine based on the blade airfoil parameters.

[0006] The method for designing blades of a resistance-type vertical axis wind turbine provided by the present invention determines the blade airfoil parameters of the resistance-type vertical axis wind turbine based on a pre-constructed first airfoil equation, and the airfoil curve is constructed based on a parabola equation; the blades of the resistance-type vertical axis wind turbine are designed based on the blade airfoil parameters. The method provided by the present invention determines the blade airfoil parameters of the resistance-type vertical axis wind turbine by using a pre-constructed first airfoil equation, and designs the blades of the resistance-type vertical axis wind turbine based on the blade airfoil parameters to obtain a blade formed by a parabolic airfoil, and the drag coefficient of the blade formed by the parabolic airfoil is greater than the drag coefficient of the traditional semicircular wind turbine blade. The blades of the resistance-type vertical axis wind turbine are adjusted to blades formed based on the parabolic airfoil, which can effectively improve the wind energy utilization rate of the resistance-type vertical axis wind turbine.

[0007] In an optional implementation, the first airfoil equation is constructed by the following steps: obtaining a parabolic equation; and constructing the first airfoil equation based on preset blade design requirements and the parabolic equation.

[0008] In an optional embodiment, the first airfoil equation is also constructed by the following steps: obtaining a second airfoil equation, the first airfoil equation is constructed based on the general equation of a circle, and the first airfoil equation and the second airfoil equation have the same value range; inputting the first airfoil equation into a preset airfoil calculation software platform for calculation to obtain a first drag coefficient of a blade formed by a parabolic airfoil; inputting the second airfoil equation into a preset airfoil calculation software platform for calculation to obtain a second drag coefficient of a blade formed by a circular airfoil; comparing the first drag coefficient and the second drag coefficient to obtain a comparison result; and evaluating the wind energy utilization rate of a vertical axis wind turbine with a parabolic airfoil blade based on the comparison result.

[0009] In an optional embodiment, the first airfoil equation is:

[0010] y=-2x 2 +2x

[0011] Among them, y represents the ordinate of the parabola, and x represents the abscissa of the parabola.

[0012] In a second aspect, the present invention provides a resistance-type vertical axis wind turbine, comprising: a plurality of blades and a rotating shaft, wherein the blades are rotatably connected to the rotating shaft; the blades are designed by the blade design method of a resistance-type vertical axis wind turbine according to the first aspect or any corresponding embodiment thereof.

[0013] The blades of the resistance type vertical axis wind turbine provided by the present invention are obtained by designing the resistance type vertical axis wind turbine through blade airfoil parameters, and the blades of the resistance type vertical axis wind turbine are blades formed by parabolic airfoils. The drag coefficient of the blades formed by the parabolic airfoil is greater than the drag coefficient of the traditional semicircular wind turbine blades. The blades of the resistance type vertical axis wind turbine are adjusted to blades formed based on the parabolic airfoil, which can effectively improve the wind energy utilization rate of the resistance type vertical axis wind turbine.

[0014] In an optional embodiment, the resistance-type vertical axis wind turbine further includes: an adjustable wind shield; the adjustable wind shield includes a receiving cavity, and the adjustable wind shield is rotatably connected to the rotating shaft.

[0015] In a third aspect, the present invention provides a blade design device for a resistance-type vertical axis wind turbine, the device comprising: a determination module for determining blade airfoil parameters of the resistance-type vertical axis wind turbine based on a pre-constructed first airfoil equation, wherein the first airfoil curve is constructed based on a parabolic equation; and a design module for designing blades of the resistance-type vertical axis wind turbine based on the blade airfoil parameters.

[0016] In a fourth aspect, the present invention provides a computer device comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the blade design method for a resistance-type vertical axis wind turbine according to the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0017] In a fifth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the blade design method for a resistance-type vertical axis wind turbine according to the first aspect or any corresponding embodiment thereof.

[0018] In the sixth aspect, the present invention provides a computer program product, including computer instructions, which are used to enable a computer to execute the blade design method for a resistance-type vertical axis wind turbine according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the blades of a drag-type vertical axis Savonius wind turbine;

[0021] Figure 2 is a schematic flow chart of a method for designing blades of a resistance-type vertical axis wind turbine according to an embodiment of the present invention;

[0022] Figure 3 It is a coordinate system diagram established based on the parabola equation;

[0023] Figure 4 It is a schematic diagram comparing the cross-sectional airfoil of a drag-type vertical axis wind turbine blade formed by a parabola equation and a conventional Savonius-type wind turbine blade;

[0024] Figure 5 is a structural schematic diagram of a resistance-type vertical axis wind turbine according to an embodiment of the present invention;

[0025] Figure 6 is a structural block diagram of a device for designing blades of a resistance-type vertical axis wind turbine according to an embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] The radial section of a wind turbine blade is called an airfoil. The blades of a drag-type vertical axis wind turbine use aerodynamic principles to convert the captured wind energy into mechanical energy to drive the generator to generate electricity. Among them, the airflow through the airfoil mainly generates resistance to drive the wind rotor to rotate. Obviously, the aerodynamic performance of the blade depends on the airfoil. And because of the different geometric characteristic parameters between airfoils, the corresponding aerodynamic performance will also be very different. In the related art, semi-cylindrical blades are generally used, and blades with other geometric characteristics are not considered to improve the aerodynamic performance of the blades, resulting in a low wind energy utilization rate of the designed vertical axis wind turbine.

[0029] In view of this, a method for designing a blade of a resistance-type vertical axis wind turbine provided in an embodiment of the present application can be applied to a server to implement the design of a blade of a resistance-type vertical axis wind turbine. The method provided by the present invention determines the blade airfoil parameters of the resistance-type vertical axis wind turbine by a pre-constructed first airfoil equation, designs the blade of the resistance-type vertical axis wind turbine based on the blade airfoil parameters, obtains a blade formed by a parabolic airfoil, and the drag coefficient of the blade formed by the parabolic airfoil is greater than the drag coefficient of the traditional semicircular wind turbine blade. The blade of the resistance-type vertical axis wind turbine is adjusted to a blade formed based on a parabolic airfoil, which can effectively improve the wind energy utilization rate of the resistance-type vertical axis wind turbine.

[0030] According to an embodiment of the present invention, an embodiment of a method for designing a blade of a resistance-type vertical axis wind turbine is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0031] In this embodiment, a method for designing a resistance-type vertical axis wind turbine blade is provided, which can be used for the above-mentioned server. Figure 2 is a flow chart of a method for designing a resistance-type vertical axis wind turbine blade according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0032] Step S201 : determining blade airfoil parameters of a drag-type vertical axis wind turbine based on a pre-constructed first airfoil equation.

[0033] Exemplarily, the first airfoil curve is constructed based on a parabola equation, and the blade airfoil parameters are used to characterize the geometric characteristic parameters of the blade.

[0034] Step S202: Design blades of a resistance-type vertical axis wind turbine based on blade airfoil parameters.

[0035] Exemplarily, in the embodiment of the present application, the airfoil of the resistance-type vertical-axis wind turbine blade constructed based on the blade airfoil parameters is a parabola.

[0036] The method for designing blades of a resistance-type vertical axis wind turbine provided in this embodiment determines the blade airfoil parameters of the resistance-type vertical axis wind turbine through a pre-constructed first airfoil equation, and designs the blades of the resistance-type vertical axis wind turbine based on the blade airfoil parameters to obtain blades formed by a parabolic airfoil. The drag coefficient of the blade formed by the parabolic airfoil is greater than the drag coefficient of the traditional semicircular wind turbine blade. The blades of the resistance-type vertical axis wind turbine are adjusted to blades formed based on the parabolic airfoil, which can effectively improve the wind energy utilization rate of the resistance-type vertical axis wind turbine.

[0037] In some optional implementations, the first airfoil equation is constructed by the following steps:

[0038] Step a1, obtaining the parabola equation.

[0039] For example, a parabola is a conic section, which is defined as the trajectory formed by a moving point P whose distance from a fixed point A is equal to its distance from a fixed line L. Q is a point on the fixed line L, and L does not pass through A, then |PA|=|PQ|. The coordinates of the set point A are The equation of the directrix L is The coordinates of the moving point on the parabola are (x, y). According to the above definition of the parabola, the equation of the parabola is as follows:

[0040]

[0041] The coordinate system diagram established according to the parabola equation is as follows Figure 3 shown.

[0042] Squaring both sides of the parabola equation, we get:

[0043] x 2 =-2py

[0044]

[0045] Step a2: constructing a first airfoil equation based on preset blade design requirements and a parabola equation.

[0046] For example, in the embodiment of the present application, in order to accurately compare the resistance of the two blade concave surfaces, the parabola should be moved to the first quadrant and the point with the same relative thickness as the semi-cylinder should be taken as the moving point P, that is, the above parabola equation is translated upward along the y-axis Then translate to the right along the x-axis The parabola equation at this time is:

[0047]

[0048] After sorting, the first airfoil equation is obtained as follows:

[0049] y=-2x 2 +2x

[0050] Among them, y represents the ordinate of the parabola, and x represents the abscissa of the parabola.

[0051] Step a3, obtaining a second airfoil equation. The first airfoil equation is constructed based on a general equation of a circle. The first airfoil equation and the second airfoil equation have the same value range.

[0052] For example, in the embodiment of the present application, in order to facilitate the subsequent simulation calculation, the second airfoil equation is assumed to be a circle with a center of The radius r is If the diameter of the circle is 1, then the chord length is 1. At this time, we take the point where y is greater than 0, which is the upper semicircle. The cross-sectional airfoil of the drag-type vertical axis wind turbine blade formed by the parabolic equation under the above conditions and the traditional Savonius type wind turbine blade is as follows: Figure 4 As shown, the dotted line represents the cross-sectional airfoil of a traditional Savonius type wind turbine blade, and the solid line represents the cross-sectional airfoil of a drag type vertical axis wind turbine blade formed based on a parabolic equation.

[0053] Step a4, inputting the first airfoil equation into a preset airfoil calculation software platform for calculation to obtain a first drag coefficient of the blade formed by the parabolic airfoil.

[0054] Step a5, inputting the second airfoil equation into a preset airfoil calculation software platform for calculation to obtain a second drag coefficient of the circular airfoil-forming blade.

[0055] Exemplarily, in the embodiment of the present application, the preset airfoil calculation software platform may include but is not limited to MATLAB. By running XFOIL using MATLAB, the drag coefficients corresponding to different airfoils can be calculated. Since the cross-sectional shapes of wind turbines are all data points formed by dimensionless quantities with a chord length of 1, XFOIL requires the provision of airfoil coordinate points before analysis, and its format is to provide a coordinate file from the trailing edge of the airfoil to the leading edge. Therefore, MATLAB is used to extract two types of airfoil coordinates from the above equation to form a Dat. format file and import it into XFOIL. In order to facilitate the calculation of its drag coefficient and comparison, the profiles appearing in the text all use data points formed by dimensionless quantities with a chord length of 1, and x in the parabola equation takes [0,1].

[0056] In the embodiment of the present application, the Reynolds number Re=10000 is taken. At this time, the inertial force is relatively large compared to the viscous force, the fluid flows quickly and is not easily hindered by viscosity, and it shows turbulent flow, which is in line with the actual operating conditions. The maximum working Mach number of the wind turbine airfoil is less than 0.3, and there is no need to consider the compression effect, so the Mach number Mach=0.2 is taken. On this basis, the drag coefficient is calculated under the clean wind tunnel conditions of Ncrit=9, and the first drag coefficient and the second drag coefficient are obtained. The first drag coefficient is the drag coefficient of the blade formed by the parabolic airfoil, and the second drag coefficient is the cross-sectional airfoil of the traditional Savonius type wind turbine blade.

[0057] Step a6, comparing the first resistance coefficient and the second resistance coefficient to obtain a comparison result.

[0058] Step a7, evaluating the wind energy utilization rate of the vertical axis wind turbine with the parabolic airfoil blade resistance based on the comparison result.

[0059] For example, in the embodiment of the present application, the drag coefficient (first drag coefficient) of the blade formed by the parabolic airfoil is greater than the drag coefficient (second drag coefficient) of the Savonius wind turbine blade. The drag of the circular airfoil blade and the parabolic airfoil blade can be calculated by the following formula:

[0060]

[0061] Among them, C d represents the drag coefficient, a dimensionless quantity; ρ represents the gas density, in kg / m 3 ; V represents the flow velocity, in m / s; c represents the chord length, in m, F D represents the blade resistance;

[0062] ρ can be calculated using the following formula:

[0063]

[0064] Among them, p represents air pressure, the unit is hPa; t represents temperature, the unit is ℃; e represents water vapor pressure, the unit is hPa.

[0065] Based on the above formula, it can be known that under the condition that other variables are the same, the larger the drag coefficient, the greater the resistance. Since the drag coefficient of the blade formed by the parabolic airfoil (the first drag coefficient) is greater than the drag coefficient of the Savonius wind turbine blade (the second drag coefficient), the parabolic blade has a greater resistance, and it can be determined that the parabolic drag vertical axis wind turbine has a greater wind energy utilization rate.

[0066] In this embodiment, a resistance type vertical axis wind turbine is provided. Figure 5 As shown, the resistance type vertical axis wind turbine comprises:

[0067] A plurality of blades 501 and a rotating shaft, wherein the blades 501 are rotatably connected to the rotating shaft;

[0068] The blade 501 is designed by the blade design method of the resistance-type vertical axis wind turbine in the above embodiment.

[0069] For example, please refer to the specific contents in the above embodiments, which will not be repeated here.

[0070] In some optional embodiments, the above-mentioned resistance-type vertical axis wind turbine further includes: an adjustable wind shield 502; the adjustable wind shield 502 includes a receiving cavity, and the adjustable wind shield is rotatably connected to the rotating shaft.

[0071] In this embodiment, a blade design device for a resistance-type vertical axis wind turbine is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated hereafter. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0072] This embodiment provides a blade design device for a resistance-type vertical axis wind turbine, such as Figure 6 As shown, including:

[0073] A determination module 601 is used to determine blade airfoil parameters of a drag-type vertical axis wind turbine based on a pre-constructed first airfoil equation, wherein the first airfoil curve is constructed based on a parabola equation;

[0074] The design module 602 is used to design a blade for a drag-type vertical axis wind turbine based on blade airfoil parameters.

[0075] In some optional implementations, the first airfoil equation is constructed by the following steps:

[0076] Get the equation of the parabola;

[0077] The first airfoil equation is constructed based on the preset blade design requirements and the parabola equation.

[0078] In some optional implementations, the first airfoil equation is also constructed by the following steps:

[0079] Obtaining a second airfoil equation, the first airfoil equation is constructed based on a general equation of a circle, and the first airfoil equation and the second airfoil equation have the same value range;

[0080] Inputting the first airfoil equation into a preset airfoil calculation software platform for calculation, and obtaining a first drag coefficient of a blade formed by a parabolic airfoil;

[0081] The second airfoil equation is input into a preset airfoil calculation software platform for calculation to obtain a second drag coefficient of the circular airfoil-forming blade;

[0082] Comparing the first drag coefficient with the second drag coefficient to obtain a comparison result;

[0083] Based on the comparison results, the wind energy utilization rate of the vertical axis wind turbine with the parabolic airfoil blade resistance is evaluated. In some optional embodiments, the first airfoil equation is:

[0084] y=-2x 2 +2x

[0085] Among them, y represents the ordinate of the parabola, and x represents the abscissa of the parabola.

[0086] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0087] The blade design device of the resistance-type vertical axis wind turbine in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0088] The embodiment of the present invention also provides a computer device having the above Figure 6 The blade design arrangement of a drag type vertical axis wind turbine is shown.

[0089] See also Figure 7 , Figure 7 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 7 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 7 A processor 10 is taken as an example.

[0090] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0091] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0092] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0093] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0094] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0095] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0096] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0097] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for designing a resistance-type vertical axis wind turbine blade, characterized in that: The method comprises: Determining blade airfoil parameters of a drag-type vertical axis wind turbine based on a pre-constructed first airfoil equation, wherein the first airfoil curve is constructed based on a parabola equation; The blade design of the resistance-type vertical axis wind turbine is performed based on the blade airfoil parameters.

2. The method according to claim 1, characterized in that The first airfoil equation is constructed by the following steps: Get the equation of the parabola; The first airfoil equation is constructed based on preset blade design requirements and the parabola equation.

3. The method according to claim 2, characterized in that The first airfoil equation is also constructed by the following steps: Obtaining a second airfoil equation, wherein the first airfoil equation is constructed based on a general equation of a circle, and the first airfoil equation and the second airfoil equation have the same value range; Inputting the first airfoil equation into a preset airfoil calculation software platform for calculation to obtain a first drag coefficient of a blade formed by a parabolic airfoil; Inputting the second airfoil equation into a preset airfoil calculation software platform for calculation to obtain a second drag coefficient of the circular airfoil-forming blade; Comparing the first drag coefficient with the second drag coefficient to obtain a comparison result; Based on the comparison results, the wind energy utilization rate of the vertical axis wind turbine with parabolic airfoil blade resistance is evaluated.

4. The method according to claim 2, characterized in that: The first airfoil equation is: y=-2x 2 +2x Among them, y represents the ordinate of the parabola, and x represents the abscissa of the parabola.

5. A resistance type vertical axis wind turbine, characterized in that: The resistance-type vertical axis wind turbine comprises: a plurality of blades and a rotating shaft, wherein the blades are rotatably connected to the rotating shaft; The blade is designed by the blade design method of a resistance-type vertical axis wind turbine as described in any one of claims 1 to 4.

6. The resistance type vertical axis wind turbine according to claim 5, characterized in that: The resistance-type vertical axis wind turbine further comprises: an adjustable wind shield; The adjustable windshield comprises a containing cavity, and the adjustable windshield is rotatably connected to the rotating shaft.

7. A blade design device for a resistance-type vertical axis wind turbine, characterized in that: The device comprises: A determination module, configured to determine blade airfoil parameters of a drag-type vertical axis wind turbine based on a pre-constructed first airfoil equation, wherein the first airfoil curve is constructed based on a parabola equation; The design module is used to design the blade of the drag type vertical axis wind turbine based on the blade airfoil parameters.

8. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the resistance-type vertical axis wind turbine blade design method according to any one of claims 1 to 6 by executing the computer instructions.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the blade design method for a resistance-type vertical axis wind turbine according to any one of claims 1 to 6.

10. A computer program product, characterized in that The method comprises computer instructions for causing a computer to execute the method for designing a blade for a resistance-type vertical axis wind turbine according to any one of claims 1 to 6.

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