CN112780485B - Wind power blade design method and device - Google Patents
Wind power blade design method and device Download PDFInfo
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- CN112780485B CN112780485B CN202110231101.XA CN202110231101A CN112780485B CN 112780485 B CN112780485 B CN 112780485B CN 202110231101 A CN202110231101 A CN 202110231101A CN 112780485 B CN112780485 B CN 112780485B
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- 238000004590 computer program Methods 0.000 claims description 9
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- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000011161 development Methods 0.000 abstract description 3
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a method and a device for designing a wind power blade, wherein the method comprises the steps of dividing a reference blade into a reference blade root module, a reference blade leaf module and a reference blade tip module; based on the length and the root diameter of the target blade root module, stretching the reference blade root module in a direction parallel to the spanwise direction and zooming in a direction perpendicular to the spanwise direction to obtain a target blade root module; based on the length of the target blade tip module and the blade tip sweepback value, performing stretching in a parallel spanwise direction and zooming in a vertical spanwise direction on the reference blade tip module to obtain a target blade tip module; the target blade root module, the reference in-leaf module and the target blade tip module are combined into the target blade, the design efficiency of the wind power blade is improved, the development and manufacturing period of the blade is shortened, the rapid response can be realized according to market demands, the manufacturing cost of a blade mold can be reduced, and the universality of the blade matching type is improved.
Description
Technical Field
The invention relates to the technical field of wind motors, in particular to a method and a device for designing a wind power blade.
Background
With the development of wind power generation technology, wind power blades are continuously developed towards the design direction of large length, high flexibility, light weight and low cost, and customers have the characteristic of diversification and changeability on the requirements of the wind power blades.
Wind blades are typically manufactured from a blade mould. Traditional modularization wind-powered electricity generation blade manufacturing and designing often only considers to practice thrift the mould cost and adopts the same root diameter design, leads to wind-powered electricity generation blade root bearing capacity not enough to the commonality is not good when wind-powered electricity generation blade manufactured matches with each model of wind power generation equipment.
Disclosure of Invention
The invention provides a wind power blade design method which is used for overcoming the defects that the manufactured wind power blade is poor in bearing capacity and poor in universality in the existing modularized wind power blade design technology.
The invention provides a wind power blade design method, which comprises the following steps: dividing a reference blade into a reference blade root module, a reference in-leaf module and a reference blade tip module;
based on the length of a target blade root module and the root diameter of the target blade root module, stretching the reference blade root module in a direction parallel to the spanwise direction, and zooming the reference blade root module in a direction perpendicular to the spanwise direction to obtain the target blade root module;
based on the length of a target blade tip module and a blade tip sweepback value of the target blade tip module, stretching the reference blade tip module in a parallel spanwise direction, and zooming the reference blade tip module in a vertical spanwise direction to obtain the target blade tip module;
and synthesizing the target blade root module, the reference in-leaf module and the target blade tip module into a target blade.
According to the wind power blade design method provided by the invention, the scaling of the reference blade root module in the vertical spanwise direction is carried out, and the method comprises the following steps:
and scaling the reference blade root module in the vertical spanwise direction by using a first scaling function, wherein the first scaling function is gradually reduced from the root of the reference blade root module to a first interface of the reference blade root module and the reference blade root module, and the first scaling function is a smooth curve.
According to the wind power blade design method provided by the invention, a first scaling function corresponding to the root of the reference blade root module is equal to the root diameter of the target blade root module divided by the root diameter of the reference blade root module, and the first scaling function corresponding to the first interface is 1.
According to the wind power blade design method provided by the invention, the stretching of the reference blade root module in the parallel spanwise direction comprises the following steps:
and stretching the reference blade root module in the parallel spanwise direction according to a first stretching ratio, wherein the first stretching ratio is equal to the length of the target blade root module divided by the length of the reference blade root module.
According to the wind power blade design method provided by the invention, the scaling of the reference blade tip module in the vertical spanwise direction is carried out, and the method comprises the following steps:
and scaling the reference blade tip module in the vertical spanwise direction by using a second scaling function, wherein the second scaling function is gradually increased from a second interface with the reference blade tip module to the tip of the reference blade tip module, and the second scaling function is a smooth curve.
According to the wind power blade design method provided by the invention, the second scaling function corresponding to the tip of the reference tip module is equal to the blade tip sweep value of the target tip module divided by the blade tip sweep value of the reference tip module, and the second scaling function corresponding to the second interface is 1.
According to the wind power blade design method provided by the invention, the reference blade tip module is stretched in the parallel spanwise direction, and the method comprises the following steps:
and stretching the reference tip module in the parallel spanwise direction by a second stretch ratio, wherein the second stretch ratio is equal to the length of the target tip module divided by the length of the reference tip module.
The invention also provides a wind power blade design device, which comprises:
the acquisition module is used for dividing the reference blade into a reference blade root module, a reference in-leaf module and a reference blade tip module,
the first calculation module is used for stretching the reference blade root module in a direction parallel to the spanwise direction and zooming the reference blade root module in a direction perpendicular to the spanwise direction based on the length of the target blade root module and the root diameter of the target blade root module to obtain the target blade root module;
the second calculation module is used for stretching the reference blade tip module in the parallel spanwise direction and zooming the reference blade tip module in the vertical spanwise direction based on the length of the target blade tip module and the blade tip sweepback value of the target blade tip module to obtain the target blade tip module;
and the determining module is used for synthesizing the target blade root module, the reference in-leaf module and the target blade tip module into a target blade.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of any one of the wind power blade design methods.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the wind turbine blade design method as described in any of the above.
According to the design method and device for the wind power blade, the reference blade is divided into the reference blade root module, the reference blade leaf module and the reference blade tip module, the target blade root module and the target blade tip module are obtained by adjusting the reference blade root module and the reference blade tip module, and the target blade root module and the target blade tip module are combined with the reference blade leaf module to form the target blade, so that the design efficiency of the wind power blade is improved, the development and manufacturing period of the blade is shortened, the universality of a blade matching machine type is improved, and the manufacturing cost of a blade mold is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a wind turbine blade design method provided by the present invention;
FIG. 2 is a schematic blade structure diagram of a wind turbine blade design method provided by the invention;
FIG. 3 is a schematic structural diagram of a wind turbine blade design apparatus provided by the present invention;
fig. 4 is a schematic structural diagram of an electronic device provided in the present invention.
Reference numerals:
211: a reference blade root module; 212: a reference in-leaf module; 213: a reference tip module; 221: a target blade root module; 223: a target blade tip module; 231: a first interface; 232: a second interface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The wind turbine blade design method of the present invention is described below with reference to fig. 1 and 2.
A wind power blade of the wind driven generator is fixedly connected with a wind wheel shaft in the generator, the wind power blade rotates under the action of wind power to drive the wind wheel shaft to rotate, and the generator converts mechanical energy generated by rotation of the wind power blade into electric energy.
The wind power blade is a core component for generating power of wind power generation equipment, and is a design key point of wind power generators of different specifications and models aiming at the design of the wind power blade.
The wind power blade is in an airfoil shape, extends from a blade root to a blade tip, and is in the spanwise direction from the root to the blade tip of the wind power blade.
The junction of wind-powered electricity generation blade and wind-wheel axle, also the root of wind-powered electricity generation blade is circular, and the petiole portion of wind-powered electricity generation blade is the extension streamline form.
As shown in fig. 1, the method for designing a wind turbine blade provided by the present invention includes: step 110 to step 140.
the reference blade is a basic blade profile of the wind power blade design method, and the reference blade is a fan blade suitable for different powers, different wind power scenes and different powers.
The reference blade can be a wind power blade of a wind driven generator of any existing type on the market, and can also be a wind power blade of a wind driven generator designed according to field application.
As shown in fig. 2, the reference blade structure is divided into three different modules at different positions in the spanwise direction: a reference root module 211, a reference mid-leaf module 212, and a reference tip module 213.
First, the divided reference blade root module 211 is a bearing area of the reference blade.
The reference blade root module 211 of the reference blade is fixedly connected with the wind wheel shaft to bear the weight load of the wind power blade, so that the wind power generation equipment consisting of the wind power blade keeps a safe and stable running state.
Wherein the reference root module 211 is located at the root of the reference blade and is in the shape of a cylinder of varying diameter.
When traditional modularized design wind-powered electricity generation blade, often only consider to practice thrift the mould cost and adopt the same root diameter design, lead to the not enough condition of blade root bearing capacity to appear, carry out the independent design adjustment to the division of blade root module, the bearing capacity of blade root can promote according to the complete machine demand.
And secondly, the divided reference lobe module 212 is a universal region of the reference lobe.
The module in the reference blade is the basis for the rotation of the reference blade, and the module in the reference blade provides enough resistance surface so that the reference blade rotates under the action of wind force.
The module in the reference blade is the main power output part of the rotating power of the reference blade.
It will be appreciated that the reference in-blade module 212 is a relatively flat portion of the middle of the wing structure of the reference blade.
And thirdly, the divided reference blade tip module 213 is a power increasing area of the reference blade.
The reference tip module 213 is a key part of the surface flow field flow control of the whole reference blade, and the shape of the reference tip module 213 has a great influence on the rotation of the reference blade under the action of wind force.
The output power of the wind power generation equipment can be effectively improved by referring to the extension of the blade tip module 213, so that the generated energy of the wind power generation equipment is improved.
It will be appreciated that the reference tip module 213 is the last part of the wing-like structure of the reference blade, which is streamlined in its entirety.
According to the wind power blade design method provided by the invention, the wind power blade is divided into the reference blade root module 211, the reference in-blade module 212 and the reference blade tip module 213 along the spanwise direction, and the wind power blade can be designed by independently changing the structural parameters of the corresponding reference blade root module 211 or the reference blade tip module 213, so that the design efficiency of the wind power blade is improved while the functions of other modules are not influenced.
the target blade is equally divided according to the division principle of the three modules of the reference blade in step 110, and then the reference blade root module 211 is adjusted based on the target blade root module 221.
The blade root bearing capacity of the target blade root module 221 is designed according to the requirements of the whole machine, and the maximum root diameter of the target blade root module 221, namely the diameter of the joint of the target blade root and the wind wheel shaft, can be obtained after the blade root bearing capacity is determined.
It should be noted that, in the present invention, the target blade is designed only for the target blade root module 221 and the target blade tip module 223, the in-leaf module of the target blade is not adjusted, and the in-leaf module of the target blade is in the same shape and size as the in-reference-leaf module 212 of the reference blade.
The target blade root module 221 is the load-bearing portion of the target blade, which is cylindrical in shape with a varying diameter.
The length of the target blade root module 221 is measured in the parallel spanwise direction of the target blade, and is the length from the root of the target blade root module 221 to the boundary between the target blade root module 221 and the reference blade root module 212.
The root diameter of the target blade root module 221 is the diameter of each section of the variable diameter cylindrical target blade root module 221, with the root diameter of the target blade root module 221 varying from place to place.
The root diameter of the target root module 221 is measured in the vertical span-wise direction of the target blade and gradually decreases from the root of the target root module 221 to the interface with the reference leaf module 212.
The length and root diameter of the reference root module 211 are measured in the same manner as the target root module 221.
When the pair of reference root modules 211 is adjusted according to the target root module 221, the reference root module 211 is stretched in the parallel spanwise direction based on the length of the target root module 221.
The reference blade root module 211 is stretched in a parallel spanwise direction such that the length of the reference blade root module 211 is stretched to the length of the target blade root module 221.
To maintain the shape and load capacity of the target blade root module 221, scaling in the vertical span direction is also performed based on the reference blade root module 211 according to the root diameter of the target blade root module 221.
The reference blade root module 211 is stretched in the direction parallel to the spanwise direction and zoomed in the direction perpendicular to the spanwise direction, the blade root bearing capacity of the obtained target blade root module 221 can be improved according to the requirement of the whole machine, and under the condition of meeting the load requirement, the design efficiency of the wind power blade is improved, so that the operation safety of the wind power blade is guaranteed, and the wind power generation equipment is supported to keep safe and stable operation.
after the reference root module 211 is designed to obtain the target root module 221 according to step 120, the reference tip module 213 is designed and adjusted to obtain the target tip module 223.
The target tip module 223 is a power increasing area of the target blade, the length of the power increasing area is measured in the parallel spanwise direction of the target blade, and the length value is the length from the boundary of the target tip module 223 and the reference in-blade module 212 to the tip of the target tip module 223.
The blade tip sweep value of the target blade tip module 223 is an included angle between the blade tip outer edge of the target blade wing structure and the spanwise central axis of the blade, and is also called a sweep angle.
And the blade tip sweepback value of the wind power blade is less than 90 degrees.
The magnitude of the tip sweep of the target tip module 223 increases from the interface of the target tip module 223 and the reference mid-leaf module 212 to the tip of the target tip module 223.
When the pair of reference tip modules 213 of the reference blade is adjusted according to the target tip module 223, the parallel spanwise stretch is performed based on the reference tip module 213 according to the length of the target tip module 223.
The reference tip module 213 is stretched in a parallel spanwise direction to stretch the length of the reference tip module 213 to the length of the target tip module 223.
To avoid the deformation of the extended target tip module 223, the scaling in the vertical span direction is performed based on the reference tip module 213 according to the tip sweep value of the target tip module 223.
The reference blade tip module 213 is stretched in the direction parallel to the span direction and zoomed in the direction perpendicular to the span direction, so that the obtained target blade tip module 223 can be ensured to be in a streamline shape, and the balance of the wind power blade obtained by combining the target blade tip modules 223 is further improved.
And step 140, synthesizing the target blade root module 221, the reference in-leaf module 212 and the target blade tip module 223 into a target blade.
And combining the target blade root module 221 obtained by adjustment in the step 120 and the target blade tip module 223 obtained by adjustment in the step 130 with the reference in-leaf module 212 to obtain the target blade.
The target blade obtained through combination is a data model of the wind power blade, when the corresponding wind power blade is manufactured according to the target blade, only the die parts corresponding to the blade root module and the blade tip module need to be adjusted, the die parts in the blade do not need to be adjusted, the design efficiency of the wind power blade is greatly improved, and the manufacturing cost of the blade die is effectively reduced.
The target blade including the target blade root module 221 and the target blade tip module 223 has sufficient bearing capacity and balance, and can support corresponding wind power generation equipment to keep safe and stable operation.
It should be noted that, in the present invention, the design is designed for adjusting the structural parameters of the reference blade root module 211 and the reference blade tip module 213, the wind turbine blade is designed by changing the individual modules, the reference blade root module 212 is a general area and is not adjusted, and the adjustment of the reference blade root module 211 or the reference blade tip module 213 does not affect the function of the reference blade root module 212.
Other shape design parameters of the wind power blade include: the chord length, the torsion angle, the thickness ratio, the module granularity, the rigidity, the strength and the dynamic characteristic can be adjusted according to the actual control requirement.
According to the wind power blade design method provided by the invention, the reference blade is divided into the reference blade root module 211, the reference in-blade module 212 and the reference blade tip module 213, the target blade root module 221 and the target blade tip module 223 are obtained by adjusting the reference blade root module 211 and the reference blade tip module 213 of the reference blade, and the target blade root module 221 and the target blade tip module 223 are combined with the reference in-blade module 212 to form the target blade, so that the wind power blade design efficiency is improved, the blade mold manufacturing cost is reduced, the blade research and development and manufacturing period is shortened, and the blade matching machine type universality is improved.
In some embodiments, the reference root module 211 is scaled in the vertical spanwise direction by a first scaling function in step 120.
The reference root module 211 is in the shape of a cylinder of varying diameter, the root diameter being different at each section in the reference root module 211.
When scaling adjustment is performed according to the reference blade root module 211, scaling in the vertical span direction needs to be performed on the reference blade root module 211 at different positions of the reference blade root module 211 according to different scaling ratios, that is, scaling ratios of various parts of the reference blade root module 211 are different.
The different scaling ratios of the reference root module 211 constitute a first scaling function.
To keep the adjusted target blade root module 221 entirely smooth in shape, the first scaling function is a smooth curve.
In some embodiments, the first scaling function may be a cubic spline curve.
The cubic spline of the first scaling function may be determined by determining the root diameter of the target blade root module 221, the diameter of the first interface 231 formed by the interface of the reference blade root module 211 and the reference blade root module 212, and the loading of the target blade root module 221.
The root diameter of the target blade root module 221 tapers from the root of the target blade root module 221 to the first interface 231, and to keep the shape of the target blade root module 221 undeformed, the corresponding first scaling function tapers from the root of the reference blade root module 211 to the first interface 231.
The root diameter of the reference blade root module 211 is adjusted to the root diameter of the target blade root module 221 according to the first scaling function corresponding to the root of the reference blade root module 211, i.e., the first scaling function corresponding to the root of the reference blade root module 211 is equal to the root diameter of the target blade root module 221 divided by the root diameter of the reference blade root module 211.
To ensure that the reference in-leaf module 212 is adapted to the adjusted reference root module 211, i.e. the target root module 221, the first scaling function corresponding to the first interface 231 is 1.
When the first scaling function at the first interface 231 of the target blade root module 221 is 1, it means that no scaling is performed at the first interface 231 of the target blade root module 221, and the size of the blade root diameter at the first interface 231 is not changed.
When the reference blade root module 211 is zoomed in a direction perpendicular to the spanwise direction, the size of the first interface 231 between the target blade root module 221 and the reference blade root module 212 is always unchanged, so that the connection between the reference blade root module 212 and the target blade root module 221 in the interface size matching mode can be effectively ensured.
According to the wind power blade design method provided by the invention, the reference blade root module 211 of the reference blade is scaled in the vertical span direction, so that the matching of the target blade root module 221 and the reference blade leaf module 212 and the shape of the target blade root module 221 are effectively ensured not to be deformed.
In some embodiments, the reference root module 211 is stretched in the parallel spanwise direction at a first stretch ratio in step 120.
The value of the target blade root module 221 is the length from the root of the target blade root module 221 to the boundary of the target blade root module 221 and the reference in-leaf module 212.
When adjusting the reference blade root module 211, the lengths of the reference blade root module 211 and the target blade root module 221 are stretched to a consistent length, i.e., the first stretch ratio is equal to the length of the target blade root module 221 divided by the length of the reference blade root module 211.
According to the wind power blade design method provided by the invention, the target blade root module 221 can be designed according to the blade root bearing capacity of the whole machine, and the target blade root module 221 is obtained by carrying out scaling in the vertical spanwise direction and stretching in the parallel spanwise direction on the reference blade root module 211 of the reference blade, so that the safety and the universality of the operation of the wind power blade are ensured.
In some embodiments, the reference tip module 213 is scaled in the vertical span-wise direction in step 130.
The blade tip sweep values of the target blade tip module 223 are different, and when scaling adjustment is performed according to the reference blade tip module 213, the shape of the reference blade tip module 213 in the vertical span-wise direction needs to be scaled by different scaling ratios.
Wherein the different scales of the reference tip module 213 constitute a second scaling function.
To keep the adjusted target blade root module 221 entirely smooth in shape, the second scaling function is a smooth curve.
In some embodiments, the second scaling function may be a cubic spline curve.
The cubic spline of the second scaling function may be determined by determining the tip sweep value for the target tip module 223, the tip sweep value for the second interface 232 formed by the interface of the reference tip module 213 and the reference in-leaf module 212, and the incremental power of the target tip module 223.
The tip sweep of target tip module 223 is progressively greater from second interface 232 to the tip of reference tip module 213, and the second scaling function is progressively greater from second interface 232 with reference lobe module 212 to the tip of reference tip module 213.
The second scaling function corresponding to the tip sweep at the tip of reference tip module 213 is equal to the tip sweep of target tip module 223 divided by the tip sweep of reference tip module 213.
To ensure that the reference in-leaf module 212 is adapted to the adjusted reference tip module 213, i.e., the target tip module 223, the second scaling function corresponding to the second interface 232 is 1.
When the second scaling function at the second interface 232 of the target tip module 223 is 1, it indicates that the second interface 232 of the target tip module 223 is not scaled, and the magnitude of the tip sweep at the second interface 232 is not changed.
When the reference blade tip module 213 is zoomed in the vertical spanwise direction, the blade tip sweep value at the second interface 232 of the target blade tip module 223 and the reference blade-in module 212 is not changed, and the connecting part of the target blade tip module 223 and the reference blade-in module 212 is streamline.
The second scaling function corresponding to the second interface 232 is 1, so that the sizes of the second interfaces 232 of the target tip module 223 and the reference leaf module 212 are always the same, and the matching connection between the reference leaf module 212 and the target tip module 223 is ensured.
According to the wind power blade design method provided by the invention, the reference blade tip module 213 of the reference blade is zoomed in the vertical spanwise direction, so that the matching of the target blade tip module 223 and the reference blade-in module 212 and the shape of the target blade tip module 223 are ensured not to be deformed.
In some embodiments, the reference tip module 213 is stretched in the parallel span-wise direction at a second stretch ratio in step 130.
The target tip module 223 length value is the length from the tip of the target tip module 223 to the second interface 232.
In adjusting reference tip module 213, the lengths of reference tip module 213 and target tip module 223 are stretched to a consistent length, i.e., the second stretch ratio is equal to the length of target tip module 223 divided by the length of reference tip module 213.
According to the wind power blade design method provided by the invention, the reference blade tip module 213 of the reference blade is subjected to scaling in the vertical spanwise direction and stretching in the parallel spanwise direction, so that the target blade tip module 223 is obtained, and the universality and the power increasing function of the target blade tip module 223 are ensured.
The wind power blade design device provided by the invention is described below, and the wind power blade design device described below and the wind power blade design method described above can be referred to correspondingly.
As shown in fig. 3, the wind turbine blade design apparatus provided by the present invention includes: an acquisition module 310, a first calculation module 320, a second calculation module 330, and a determination module 340.
An acquisition module 310, configured to divide the reference blade into a reference blade root module 211, a reference blade leaf module 212, and a reference blade tip module 213;
the first calculation module 320 is configured to stretch the reference blade root module 211 in the parallel spanwise direction based on the length of the target blade root module 221 and the root diameter of the target blade root module 221, and scale the reference blade root module 211 in the vertical spanwise direction to obtain the target blade root module 221;
the second calculation module 330 is configured to stretch the reference tip module 213 in the parallel spanwise direction based on the length of the target tip module 223 and the tip sweep value of the target tip module 223, and scale the reference tip module 213 in the vertical spanwise direction, so as to obtain the target tip module 223;
the determination module 340 is configured to combine the target blade root module 221, the reference in-leaf module 212, and the target blade tip module 223 into a target blade.
According to the wind power blade design method provided by the invention, the target blade root module 221 and the target blade tip module 223 are obtained by adjusting the reference blade root module 211 and the reference blade tip module 213 of the reference blade, and the target blade root module 221 and the target blade tip module 223 are combined with the reference blade root module 212 to form the target blade, so that the wind power blade design efficiency is improved, the blade research and development and manufacturing period is shortened, the blade mold manufacturing cost is reduced, and the universality of a blade matching machine type is improved.
In some embodiments, the first calculation module 320 is further configured to scale the reference root module 211 in the vertical span-wise direction by a first scaling function, the first scaling function gradually decreases from the root of the reference root module 211 to the first interface 231 with the reference lobe module 212, and the first scaling function is a smooth curve.
In some embodiments, the first scaling function corresponding to the root of the reference root module 211 is equal to the root diameter of the target root module 221 divided by the root diameter of the reference root module 211, and the first scaling function corresponding to the first interface 231 is 1.
In some embodiments, the first calculation module 320 is further configured to perform a parallel spanwise stretch on the reference root module 211 at a first stretch ratio, the first stretch ratio being equal to the length of the target root module 221 divided by the length of the reference root module 211
In some embodiments, the second calculating module 330 is further configured to scale the reference blade tip module 213 in the vertical span-wise direction by a second scaling function, the second scaling function gradually increases from the second interface 232 with the reference in-blade module 212 to the tip of the reference blade tip module 213, and the second scaling function is a smooth curve
In some embodiments, the second scaling function for the tip of the reference tip module 213 is equal to the tip sweep of the target tip module 223 divided by the tip sweep of the reference tip module 213, and the second scaling function for the second interface 232 is 1.
In some embodiments, second calculation module 330 is further configured to stretch reference tip module 213 in the spanwise direction by a second stretch ratio, where the second stretch ratio is equal to the length of target tip module 223 divided by the length of reference tip module 213.
Fig. 4 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 4: a processor (processor)410, a communication Interface 420, a memory (memory)430 and a communication bus 440, wherein the processor 410, the communication Interface 420 and the memory 430 are communicated with each other via the communication bus 440. The processor 410 may invoke logic instructions in the memory 430 to perform a wind blade design method comprising: dividing a reference blade into a reference blade root module, a reference in-leaf module and a reference blade tip module; based on the length of the target blade root module and the root diameter of the target blade root module, stretching the reference blade root module in the parallel spanwise direction, and zooming the reference blade root module in the vertical spanwise direction to obtain the target blade root module; based on the length of the target blade tip module and the blade tip sweepback value of the target blade tip module, stretching the reference blade tip module in the parallel spanwise direction, and zooming the reference blade tip module in the vertical spanwise direction to obtain the target blade tip module; and synthesizing the target blade root module, the reference in-leaf module and the target blade tip module into a target blade.
In addition, the logic instructions in the memory 430 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the wind power blade design method provided by the above methods, the method comprising: dividing a reference blade into a reference blade root module, a reference in-leaf module and a reference blade tip module; based on the length of the target blade root module and the root diameter of the target blade root module, stretching the reference blade root module in the parallel spanwise direction, and zooming the reference blade root module in the vertical spanwise direction to obtain the target blade root module; based on the length of the target blade tip module and the blade tip sweepback value of the target blade tip module, stretching the reference blade tip module in the parallel spanwise direction, and zooming the reference blade tip module in the vertical spanwise direction to obtain the target blade tip module; and synthesizing the target blade root module, the reference in-leaf module and the target blade tip module into a target blade.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor is implemented to perform the wind turbine blade design method provided above, the method comprising: dividing a reference blade into a reference blade root module, a reference in-leaf module and a reference blade tip module; based on the length of the target blade root module and the root diameter of the target blade root module, stretching the reference blade root module in the parallel spanwise direction, and zooming the reference blade root module in the vertical spanwise direction to obtain the target blade root module; based on the length of the target blade tip module and the blade tip sweepback value of the target blade tip module, stretching the reference blade tip module in the parallel spanwise direction, and zooming the reference blade tip module in the vertical spanwise direction to obtain the target blade tip module; and synthesizing the target blade root module, the reference in-leaf module and the target blade tip module into a target blade.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A wind power blade design method is characterized by comprising the following steps:
dividing the reference blade into a reference blade root module, a reference blade middle module and a reference blade tip module;
based on the length of a target blade root module and the root diameter of the target blade root module, stretching the reference blade root module in a direction parallel to the spanwise direction, and zooming the reference blade root module in a direction perpendicular to the spanwise direction to obtain the target blade root module;
based on the length of a target blade tip module and a blade tip sweepback value of the target blade tip module, stretching the reference blade tip module in a parallel spanwise direction, and zooming the reference blade tip module in a vertical spanwise direction to obtain the target blade tip module;
synthesizing the target blade root module, the reference in-leaf module and the target blade tip module into a target blade;
the target blade root module is a bearing part of the target blade, and the root diameter of the target blade root module is determined according to the blade root bearing capacity of the target blade root module;
the target tip module is a power augmentation region of the target blade;
scaling the reference root module in a vertical spanwise direction, comprising:
scaling the reference blade root module in the vertical spanwise direction by using a first scaling function, wherein the first scaling function is gradually reduced from the root of the reference blade root module to a first interface of the reference blade root module and the reference blade root module, and the first scaling function is a smooth curve;
a first scaling function corresponding to the root of the reference root module is equal to the root diameter of the target root module divided by the root diameter of the reference root module, and the first scaling function corresponding to the first interface is 1;
wherein the reference in-leaf module is not adjusted, and the in-leaf module of the target blade is consistent with the reference in-leaf module of the reference blade in shape and size.
2. The method of claim 1, wherein the stretching the reference root module in a parallel spanwise direction comprises:
and stretching the reference root module in a parallel spanwise direction at a first stretch ratio, the first stretch ratio being equal to the length of the target root module divided by the length of the reference root module.
3. The wind power blade design method according to claim 1 or 2, wherein scaling the reference blade tip module in a vertical span-wise direction comprises:
and scaling the reference blade tip module in the vertical span-wise direction by using a second scaling function, wherein the second scaling function is gradually enlarged from a second interface of the second scaling function with the reference blade tip module to the tip of the reference blade tip module, and the second scaling function is a smooth curve.
4. The wind power blade design method according to claim 3, wherein the second scaling function corresponding to the tip of the reference tip module is equal to the tip sweep value of the target tip module divided by the tip sweep value of the reference tip module, and the second scaling function corresponding to the second interface is 1.
5. The wind turbine blade design method according to any one of claims 1 or 2, wherein the stretching of the reference blade tip module in a parallel spanwise direction comprises:
stretching the reference tip module in the parallel spanwise direction at a second stretch ratio equal to the target tip module length divided by the reference tip module length.
6. A wind turbine blade design apparatus, the apparatus comprising:
the acquisition module is used for segmenting the reference blade into a reference blade root module, a reference in-leaf module and a reference blade tip module;
the first calculation module is used for stretching the reference blade root module in a direction parallel to the spanwise direction and zooming the reference blade root module in a direction perpendicular to the spanwise direction based on the length of the target blade root module and the root diameter of the target blade root module to obtain the target blade root module;
the second calculation module is used for stretching the reference blade tip module in the parallel spanwise direction and zooming the reference blade tip module in the vertical spanwise direction based on the length of the target blade tip module and the blade tip sweepback value of the target blade tip module to obtain the target blade tip module;
the determining module is used for combining the target blade root module, the reference in-leaf module and the target blade tip module into a target blade;
the target blade root module is a bearing part of the target blade, and the root diameter of the target blade root module is determined according to the blade root bearing capacity of the target blade root module;
the target tip module is a power augmentation region of the target blade;
the first calculation module is used for scaling the reference blade root module in the vertical span-wise direction by using a first scaling function, the first scaling function is gradually reduced from the root of the reference blade root module to a first interface with the reference blade root module, and the first scaling function is a smooth curve;
a first scaling function corresponding to the root of the reference root module is equal to the root diameter of the target root module divided by the root diameter of the reference root module, and the first scaling function corresponding to the first interface is 1;
wherein the reference in-leaf module is not adjusted, and an in-leaf module of the target leaf is in conformity with the reference in-leaf module of the reference leaf in shape and size.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the wind turbine blade design method according to any of claims 1 to 5 when executing the program.
8. A non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, performs the steps of the wind turbine blade design method according to any of claims 1 to 5.
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| CN105822510A (en) * | 2016-04-12 | 2016-08-03 | 南京航空航天大学 | Blade tip serialization segmentation blade and design method thereof |
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