CN114722517A - Method, device, equipment and medium for generating resistance reducing device design diagram based on airfoil - Google Patents
Method, device, equipment and medium for generating resistance reducing device design diagram based on airfoil Download PDFInfo
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Abstract
The disclosure provides a method and a device for generating a resistor reducing design drawing based on an airfoil, electronic equipment and a storage medium, and relates to the technical field of blade testing. The method comprises the following steps: acquiring the maximum thickness position of the sample airfoil profile, and extracting the front edge half side of the segmented sample airfoil profile; taking the maximum thickness position as a symmetry axis, and symmetrically processing the front edge half side of the sample airfoil profile to obtain an initial resistance reducing device shape and an initial resistance reducing device short axis; carrying out segmentation treatment on the sample testing blade to obtain the central chord length of each section of the sample testing blade and the ratio of the central chord length to the short axis of the initial resistance reducer; and adjusting the length of the initial resistor reducing short shaft to enable the length of the initial resistor reducing short shaft to be equal to the central chord length to obtain the resistor reducing short shaft, and adjusting the initial resistor reducing appearance according to the ratio to obtain the resistor reducing appearance. This is disclosed obtains the drag reduction ware through improving and designing on the basis of wing section, can carry out further optimization to blade drag reduction effect in fatigue test, has promoted the drag reduction effect.
Description
Technical Field
The disclosure relates to the technical field of blade testing, in particular to a method and a device for generating a resistance reducing device design diagram based on an airfoil shape, electronic equipment and a storage medium.
Background
The full-size blade structure test is an important means for verifying the effectiveness and reliability of the design of the wind power blade, the reliability of the blade is verified by adopting the method internationally for the novel blade at present, the full-size blade structure test comprises a static test and a fatigue test, the fatigue test is mainly used for verifying whether the blade structure meets the requirement of service life in two directions of flapping and shimmy, the fatigue testing vibration exciter is arranged on the blade, the vibration exciter and the blade realize resonance to achieve the aim of carrying out fatigue testing on the blade, the vibration exciter needs to continuously provide excitation to overcome the damping generated in the resonance with the blade, particularly in the fatigue testing in the waving direction, because the windward area of the blade is far larger than that of the shimmy direction, the pneumatic damping determines whether the fatigue test can complete excitation or not to a certain extent.
In the blade testing process, a resistance reducing device is usually additionally arranged on a blade to reduce the influence of pneumatic damping on the resonance of a vibration exciter and the blade, and the shape of the resistance reducing device is similar to the shape of a triangular prism, a circular shape, an oval shape and the like.
It is noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to overcome the above-mentioned deficiencies of the prior art, and provides a method and an apparatus for generating an airfoil-based resistor-reducing design, an electronic device, and a storage medium.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows, or in part will be obvious from the description, or may be learned by practice of the disclosure.
According to one aspect of the present disclosure, there is provided an airfoil-based drag reducer plan generating method, including: acquiring the maximum thickness position of the sample airfoil profile, dividing the sample airfoil profile by the maximum thickness position, and extracting the half side with the large curvature of the sample airfoil profile;
taking the maximum thickness position as a symmetry axis, and symmetrically processing the half side with the large airfoil curvature of the sample to obtain an initial resistance reducing device outline drawing and an initial resistance reducing device short axis;
carrying out segmentation treatment on the sample testing blade to obtain the central chord length of each section of the sample testing blade and the ratio of the central chord length to the short axis of the initial resistance reducer;
and adjusting the length of the initial resistor reducing short shaft to enable the length of the initial resistor reducing short shaft to be equal to the central chord length to obtain a resistor reducing short shaft, and adjusting the initial resistor reducing outline drawing according to the ratio to obtain a resistor reducing outline drawing.
In some embodiments of the present disclosure, based on the foregoing scheme, the maximum thickness position is used as a normalization parameter, and the initial resistance reducing device profile is normalized according to the normalization parameter.
In some embodiments of the present disclosure, based on the foregoing scheme, the length of each section of the sample test blade is used as a three-dimensional parameter, and the three-dimensional resistance reducing device outline drawing is subjected to three-dimensional processing to obtain a three-dimensional resistance reducing device design drawing.
In some embodiments of the present disclosure, after obtaining the three-dimensional resistor reducing design drawing based on the foregoing scheme, the method further includes:
and processing the center of the three-dimensional resistance reducing device according to the shape of each section of sample testing blade to obtain a central through hole of the three-dimensional resistance reducing device.
In some embodiments of the present disclosure, based on the foregoing, a cross-sectional axis of the central through hole is equal to a length of a short axis of the three-dimensional resistance reducer.
In some embodiments of the present disclosure, based on the foregoing scheme, the three-dimensional resistor reducing design is combined from three-dimensional resistor reducing design drawings of a plurality of segments of the sample test blade.
In some embodiments of the present disclosure, based on the foregoing scheme, the central chord length of each section of the sample test vane is the vane chord length of the central position of each section of the sample test vane.
According to another aspect of the present disclosure, there is provided an airfoil-based drag reduction device plan generating apparatus, including: the parameter acquisition module is used for acquiring sample airfoil parameters and sample testing blade parameters;
and the pattern generation module is used for generating an initial resistance reducing device outline diagram and a resistance reducing device outline diagram and generating a three-dimensional resistance reducing device design diagram according to the sample airfoil parameters, the test blade parameters and the resistance reducing device outline diagram.
The logic calculation module is used for obtaining a three-dimensional resistance reducing device design drawing according to the sample airfoil parameters, the test blade parameters and the resistance reducing device outline drawing;
and the result output module is used for outputting the three-dimensional resistor reducing design drawing.
According to another aspect of the present disclosure, there is provided an electronic device comprising a processor and a memory, the memory having stored therein at least one instruction, the at least one instruction being loaded and executed by the processor to implement the method of any of the above.
According to another aspect of the disclosure, there is provided a computer-readable storage medium having stored therein at least one instruction, which is loaded and executed by a processor, to implement the method of any of the above.
The utility model provides a drag reduction resistor design drawing generation method based on wing section, this method improves the drag reduction resistor based on wing section, through cutting apart the wing section with the maximum thickness department of wing section, and carry out symmetrical processing to the half side that the camber of wing section is big, obtain initial drag reduction resistor appearance, and adjust initial drag reduction resistor's appearance according to the ratio of the central chord length of test blade and initial drag reduction resistor minor axis, obtain drag reduction resistor's appearance, because the wing section has the characteristic of low resistance, the drag reduction resistor that this disclosure designed according to the wing section can reduce aerodynamic resistance, promoted drag reduction resistor, can promote the validity of the fatigue test of test blade.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic flow chart diagram of a method for generating an airfoil-based drag reduction resistor design diagram in an exemplary embodiment of the disclosure.
FIG. 2 is a normalized two-dimensional profile of an airfoil-based drag reducer in an exemplary embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of an airfoil-based drag reduction device design diagram generation apparatus in an exemplary embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of an electronic device in an exemplary embodiment of the present disclosure.
Wherein the reference numerals are as follows:
100: a device for generating a resistance reducing device design diagram based on airfoil;
101: a parameter acquisition module; 102: a graph generation module;
103: a logic operation module; 104: a result output module;
1000: an electronic device;
1010: a processing unit;
1020 a memory cell; 1021: a random access memory cell;
1022: a cache storage unit; 1023: a read-only memory cell;
1024: a program/utility tool; 1025: a program module;
1030: a bus; 1040: an input/output interface; 1050: a network adapter;
1100: and (4) an external device.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.
The profile design of aircraft airfoils, which has been developed and improved over the years, has the characteristics of high lift and low drag, and the airfoils have a significant advantage in reducing aerodynamic drag compared to other conventional shapes. In the blade testing technology, because the effect of the drag reducer is mainly to reduce the air resistance, and the performance of high lift force is not required to be provided, the inventor considers the problems of field manufacturing cost, manufacturing difficulty and the like of the drag reducer based on the improvement of the wing profile, selects the wing profile with simpler appearance to improve the drag reducer, and can achieve the purpose of reducing the drag reduction effect of the drag reducer.
In the existing airfoil data, because the windward side and the leeward side of the symmetrical airfoil are symmetrical based on the airfoil chord length, the symmetrical airfoil is simple in structure and beneficial to manufacturing and mounting of a drag reducer, and when a fatigue test is carried out on a tested blade, the drag reducer based on transformation of the symmetrical airfoil can improve the drag reduction effect when the blade reciprocates, therefore, the NACA0024 airfoil is selected and used in the method, the airfoil has the maximum relative thickness in the symmetrical airfoil, the drag reducer based on the NACA0024 airfoil is good in pneumatic resistance reduction effect, and the drag reducer is convenient to manufacture and mount.
The embodiment of the disclosure provides an airfoil-based resistor reducing design drawing generation method, as shown in fig. 1, the method includes:
s101: acquiring the maximum thickness position of the sample airfoil, dividing the sample airfoil by the maximum thickness position, and extracting the half side with large curvature of the sample airfoil;
s102: taking a straight line in the direction of the vertical chord length at the position with the maximum thickness as a symmetry axis, and symmetrically processing the half side with the large airfoil curvature of the sample to obtain an initial resistance reducing device outline drawing and an initial resistance reducing device short axis;
s103: carrying out segmentation treatment on the sample testing blade to obtain the central chord length of each section of the sample testing blade and the ratio of the central chord length to the short axis of the initial resistance reducer;
s104: and adjusting the length of the initial resistor reducing short shaft to enable the length of the initial resistor reducing short shaft to be equal to the central chord length to obtain a resistor reducing short shaft, and adjusting the initial resistor reducing outline drawing according to the ratio to obtain a resistor reducing outline drawing.
Wherein, S101: and acquiring the maximum thickness position of the sample airfoil, dividing the sample airfoil at the maximum thickness position (the description of the subsequent maximum thickness position is recommended to be replaced by the maximum thickness position), and extracting the half side with the larger curvature of the sample airfoil.
In some embodiments, the sample airfoil is generally an NACA0024 airfoil, the maximum thickness of the NACA0024 airfoil is determined as the maximum thickness position of the sample airfoil, and the sample airfoil is divided into two parts at the maximum thickness position of the sample airfoil, wherein one part is a leading edge half side and the other part is a trailing edge half side, the profile curvature radius of the leading edge half side is greater than that of the trailing edge half side, the trailing edge half side is removed, and the leading edge half side of the sample airfoil is retained, that is, the half side with the greater curvature of the sample airfoil is extracted.
It should be noted that, the present disclosure is based on the front edge half side of the NACA0024 airfoil as a base to be improved to obtain the drag reducer, but the present disclosure is not limited to this type of airfoil, and may also be other symmetric airfoils or asymmetric airfoils, and the selection of a specific airfoil may be selected according to the design requirement of the drag reducer.
Wherein, S102: and taking the maximum thickness position as a symmetry axis, and symmetrically processing the half side with the large airfoil curvature of the sample to obtain an initial resistance reducing device outline drawing and an initial resistance reducing device short axis.
In some embodiments, the maximum thickness position of the sample airfoil is obtained in step S101, and the half side with the large curvature of the sample airfoil is extracted, and the half side with the large curvature of the sample airfoil is taken as a symmetry axis, and the half side with the large curvature of the sample airfoil is subjected to a symmetry process, that is, the half side of the leading edge of the sample airfoil is subjected to a symmetry process, at this time, an initial resistance reducing profile and a short axis of an initial resistance reducing device are obtained, where the initial resistance reducing profile is a two-dimensional graph, and the short axis of the initial resistance reducing device is equal to the maximum thickness position of the sample airfoil.
In some embodiments, after the leading edge half side of the sample airfoil is subjected to the symmetry processing, the maximum thickness position of the sample airfoil may be used as a normalization parameter, and the normalization processing may be performed on the symmetrical leading edge half side of the sample airfoil according to the normalization parameter, that is, the normalization processing may be performed on the initial damper profile to obtain a normalized two-dimensional profile of the damper, fig. 2 is a normalized two-dimensional profile of the damper based on the airfoil in the exemplary embodiment of the present disclosure, as shown in fig. 2, wherein an X axis and a Y axis in the diagram respectively represent data parameters after normalization of the two-dimensional damper, the normalized two-dimensional damper has an ellipse-like shape, and the normalization processing is performed on the initial damper profile, so that a process of designing the damper may be simplified and facilitated.
Wherein, S103: and carrying out segmentation treatment on the sample testing vane to obtain the central chord length of each section of the sample testing vane and the ratio of the central chord length to the short axis of the initial resistance reducer.
After the steps S101 and S102 are performed, the profile of the initial resistor reducer can be obtained, the sample test blade is processed, because the sample testing blade is of a three-dimensional structure, the sample testing blade needs to be subjected to segmentation treatment, generally, the blade is subjected to decomposition treatment of a plurality of sections along the length direction of the blade of the sample testing blade, the segment length of each section of the sample testing blade is equal, ideally, the length of each sample testing paddle should be infinitely close to zero, but the present disclosure is not limited to the length of each sample testing paddle being infinitely close to zero, the length of each section of sample testing blade can be specifically adjusted according to the requirements of testing cost, manufacturing cost and the like in the actual testing process, taking a blade with the length of 80m as an example, the length of each section of the sample test blade can be made as short as possible, for example, the length of each section of the test blade can be in the range of 5m-10m, while controlling the test cost.
After the sample testing blade is divided into equal lengths, the central chord length of each section of the sample testing blade can be obtained according to the actual size of each section of the sample testing blade, and the central chord length of each section of the sample testing blade is the blade chord length of the central position of each section of the sample testing blade.
After the central chord length of each section of sample testing blade is obtained, the ratio of the central chord length to the short axis of the initial resistance reducer, namely the ratio of the central chord length of each section of sample testing blade to the maximum thickness position of the sample airfoil profile, can be obtained.
Wherein, S104: and adjusting the length of the initial resistor reducing short shaft to enable the length of the initial resistor reducing short shaft to be equal to the central chord length to obtain a resistor reducing short shaft, and adjusting the initial resistor reducing outline drawing according to the ratio to obtain a resistor reducing outline drawing.
In the above steps S101 to S103, the length of the short axis of the initial resistance reducer is obtained as the maximum thickness position of the sample airfoil, the center chord length of each section of the sample test blade is obtained, the length of the short axis of the initial resistance reducer is adjusted so that the length of the short axis of the resistance reducer is equal to the center chord length of the sample test blade, the length of the short axis of the resistance reducer is determined, and meanwhile, the overall size of the initial resistance reducer is enlarged or reduced by the ratio according to the ratio of the center chord length of the sample test blade obtained in the above steps to the short axis of the sample initial resistance reducer, so as to obtain the profile of the resistance reducer.
The outline drawing of the drag reducer is a two-dimensional outline generating drawing of the drag reducer, the two-dimensional outline drawing of the drag reducer is in an ellipse-like shape, the two-dimensional outline drawing of the drag reducer is obtained by the drag reducer based on the NACA0024 type airfoil modification of the present disclosure, the ratio of the long axis to the short axis of the drag reducer is 1:0.4, it should be noted that the ratio of the long axis to the short axis is only the ratio of the long axis to the short axis of the drag reducer based on the NACA0024 type airfoil modification, if the drag reducer is designed by using airfoils of different types, the ratio of the long axis to the short axis of the drag reducer can be correspondingly changed based on different airfoils, and the present disclosure is not limited thereto.
After the two-dimensional profile diagram of the resistance reducer is obtained, the length of each section of sample testing blade can be used as a three-dimensional parameter of the two-dimensional resistance reducer, and the two-dimensional profile diagram of the resistance reducer is subjected to three-dimensional processing, namely the length of each section of sample testing blade is used as a standard, so that the two-dimensional resistance reducer is stretched in length, the stretched length is equal to the length of each section of sample testing blade, a three-dimensional resistance reducer design diagram is obtained, and the profile diagram of the three-dimensional resistance reducer is obtained.
After the appearance design drawing of the three-dimensional resistance reducer is obtained, because the sample testing blade needs to be installed in the middle of the resistance reducer, in some embodiments, hole digging processing needs to be performed on the corresponding three-dimensional resistance reducer according to the shape of each section of the sample testing blade, so that a central through hole with the same shape as the sample testing blade can be formed in the central position of the three-dimensional resistance reducer, and in the testing process, the resistance reducer can be installed on the sample testing blade, so that the sample testing blade is located in the central through hole of the resistance reducer.
It should be noted that the length of the cross-sectional axis of the central through hole of the damper is equal to the length of the short axis of the three-dimensional damper, i.e., the length of the long axis of the cross-section of the sample test blade is equal to the length of the short axis of the cross-section of the damper.
It should be noted that the three-dimensional resistance reducer is designed according to each section of the sample testing blade, and therefore, the final overall appearance of the three-dimensional resistance reducer is formed by combining a plurality of sections of the three-dimensional resistance reducer.
The method comprises the steps of carrying out improvement on a drag reduction device designed and obtained by the method based on an airfoil, carrying out segmentation and symmetrical treatment on a sample airfoil, and carrying out scaling on the sample airfoil after the symmetrical treatment in an equal proportion according to the ratio of the central chord length of a test blade to the maximum thickness of the sample airfoil to obtain a two-dimensional outline drawing of the drag reduction device.
The present disclosure provides an airfoil-based drag reduction device design drawing generation method, and in some embodiments, a drag reduction device may be manufactured according to the method provided by the present disclosure, and the drag reduction device of the present disclosure may be made of a foam material, and when the drag reduction device is manufactured, firstly, the foam may be cut into the airfoil-based drag reduction device according to the method provided by the present disclosure, and secondly, the drag reduction device may be cut into a shape of a sample test blade at a central position according to the shape of the sample test blade, and when the drag reduction device is mounted on the test blade, a short axis of the drag reduction device coincides with a central chord length of the test blade, that is, a leading edge point and a trailing edge point of a cross section of the test blade coincide with both ends of the short axis of the drag reduction device, respectively.
In the production process of the resistance reducing device, on the premise of not influencing the installation of the resistance reducing device and the test blades, the positions, except the central through hole, in the resistance reducing device can be properly hollowed, so that the dead weight of the resistance reducing device can be reduced, and the damping of the resistance reducing device is further reduced.
When the resistance reducer is installed with the test blades, the resistance reducer of each section of sample test blade can be installed respectively, the resistance reducer can be bound on the sample test blades by using a ratchet binding band, or the resistance reducer is bonded on the sample test blades by using a bonding mode, and the fatigue test of the sample test blades can be carried out after each section of resistance reducer is combined into a complete resistance reducer shape.
According to the method for generating the airfoil-based drag reduction device design drawing, the aerodynamic resistance generated by the generated three-dimensional drag reduction device in the operation process can be calculated through simulation software, for example, in the blade flapping test process, the motion of a certain point of the blade is described as sinusoidal motion, the blade oscillation screen frequency can be calculated through methods such as modeling or structural finite element before the test, the speed change condition of the point on the blade can be described through a mathematical relation, the aerodynamic resistance generated by the drag reduction device bound on the blade at different motion speeds can be calculated through the simulation software, the work done by the aerodynamic resistance in the drag reduction device motion process can be obtained through a meter, and the maximum resistance value in the operation process can be obtained.
According to the simulation method, the test blade with the length of 80m is taken as an example, the resistance reducer obtained by the method for generating the resistance reducer design drawing based on the airfoil shape provided by the disclosure is compared with a triangular prism-shaped resistance reducer and a circular-shaped resistance reducer, the resistance reducer provided by the disclosure has a better resistance reduction effect, and meanwhile, the resistance reducer provided by the disclosure can be greatly reduced in resistance and resistance doing work compared with the existing elliptical resistance reducer, so that the resistance reducer has a better resistance reduction effect.
In another aspect, the present disclosure provides an airfoil-based resistor reducing design drawing generation apparatus, as shown in fig. 3, the generation apparatus 100 includes: a parameter acquisition module 101, a graph generation module 102, a logic calculation module 103 and a result output module 104.
The parameter obtaining module 101 is configured to obtain a sample airfoil parameter and a sample test blade parameter.
The parameter obtaining module 101 may obtain the maximum thickness position of the sample airfoil according to the structure of the sample airfoil, and in addition, the parameter obtaining module may further obtain the center chord length of each section of the sample test blade and the length of each section of the sample test blade according to the structure of the sample test blade.
Wherein the pattern generation module 102 is configured to generate an initial resistor reduction profile and a resistor reduction profile, and to generate a three-dimensional resistor reduction design from the sample airfoil parameters and the test blade parameters and the resistor reduction profile.
The logic calculation module 103 is configured to obtain a three-dimensional resistor reducing design drawing according to the sample airfoil parameters, the test blade parameters, and the resistor reducing outline drawing.
The logic calculation module 103 may compare and calculate the parameters generated by the parameter generation module 101, obtain a ratio between the center chord length of each section of the sample test blade and the maximum thickness position of the sample airfoil, and reduce or enlarge the initial resistance reducing device outline drawing in a corresponding proportion according to the value of the ratio, and in addition, the logic calculation module 103 may determine the position relationship of the corresponding resistance reducing device according to the position relationship of each section of the sample test blade.
Wherein the result output module 104 is configured to output the three-dimensional resistor reducing design drawing.
The result output module 104 is configured to output the layout generated by the pattern generation module 102, and may be configured to output an initial resistor reducing profile, a two-dimensional resistor reducing profile, and a final three-dimensional resistor reducing layout.
Exemplary embodiments of the present disclosure also provide a computer-readable storage medium, which may be implemented in the form of a program product, including program code for causing an electronic device to perform the steps according to various exemplary embodiments of the present disclosure described in the above-mentioned "exemplary method" section of this specification, when the program product is run on the electronic device. In one embodiment, the program product may be embodied as a portable compact disc read only memory (CD-ROM) and include program code, and may be run on an electronic device, such as a personal computer. However, the program product of the present disclosure is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
Exemplary embodiments of the present disclosure also provide an electronic device, which may be a background server of an information platform. The electronic device is explained below with reference to fig. 4. It should be understood that the electronic device 1000 shown in fig. 4 is only one example and should not bring any limitations to the function and scope of use of the embodiments of the present disclosure.
As shown in fig. 4, the electronic device 1000 is embodied in the form of a general purpose computing device. The components of the electronic device 1000 may include, but are not limited to: at least one processing unit 1010, at least one memory unit 1020, and a bus 1030 that couples various system components including the memory unit 1020 and the processing unit 1010.
Where the storage unit stores program code that may be executed by the processing unit 1010 to cause the processing unit 1010 to perform the steps according to various exemplary embodiments of the present invention described in the "exemplary methods" section above in this specification. For example, the processing unit 1010 may perform the method steps, etc., as shown in fig. 1.
The memory unit 1020 may include volatile memory units such as a random access memory unit (RAM)1021 and/or a cache memory unit 1022, and may further include a read only memory unit (ROM) 1023.
The electronic device 1000 may also communicate with one or more external devices 1100 (e.g., keyboard, pointing device, bluetooth device, etc.) via input/output (I/O) interfaces 1040. The electronic device 1000 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the internet) through the network adapter 1050. As shown, the network adapter 1050 communicates with the other modules of the electronic device 1000 via a bus 1030. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the electronic device 1000, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit, according to exemplary embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
As will be appreciated by one skilled in the art, aspects of the present disclosure may be embodied as a system, method or program product. Accordingly, various aspects of the present disclosure may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the following claims.
Claims (10)
1. A method for generating a resistor reducing design drawing based on airfoil profile is characterized by comprising the following steps:
acquiring the maximum thickness position of the sample airfoil profile, dividing the sample airfoil profile by the maximum thickness position, and extracting the half side with the large curvature of the sample airfoil profile;
taking a straight line in the direction of the vertical chord length at the maximum thickness position as a symmetry axis, and symmetrically processing the half side with the large airfoil curvature of the sample to obtain an initial resistance reducing device outline drawing and an initial resistance reducing device short axis;
carrying out segmentation treatment on the sample testing blade to obtain the central chord length of each section of the sample testing blade and the ratio of the central chord length to the short axis of the initial resistance reducer;
and adjusting the length of the initial resistor reducing short shaft to enable the length of the initial resistor reducing short shaft to be equal to the central chord length to obtain a resistor reducing short shaft, and adjusting the initial resistor reducing outline drawing according to the ratio to obtain a resistor reducing outline drawing.
2. The airfoil-based drag reducer plan generating method of claim 1, further comprising:
and taking the maximum thickness position as a normalization parameter, and carrying out normalization processing on the initial resistance reducing device outline drawing according to the normalization parameter.
3. The airfoil-based drag reducer plan generating method of claim 1, further comprising:
and taking the length of each section of the sample testing blade as a three-dimensional parameter, and carrying out three-dimensional treatment on the resistance reducing device outline drawing to obtain a three-dimensional resistance reducing device design drawing.
4. The airfoil-based drag reducer layout generating method of claim 3,
after obtaining the three-dimensional resistance reducing device design drawing, the method further comprises the following steps:
and processing the center of the three-dimensional resistance reducing device according to the shape of each section of sample testing blade to obtain a central through hole of the three-dimensional resistance reducing device.
5. The airfoil-based drag reducer layout generating method of claim 4,
the section axis of the central through hole is equal to the length of the short axis of the three-dimensional drag reducer.
6. The airfoil-based drag reducer layout generating method of claim 3,
the three-dimensional resistance reducing device design drawing is formed by combining a plurality of sections of three-dimensional resistance reducing device design drawings of the sample testing blade.
7. The airfoil-based drag reducer layout generating method of claim 1,
the central chord length of each section of the sample testing vane is the vane chord length of the central position of each section of the sample testing vane.
8. An airfoil-based drag reduction device map generating apparatus, comprising:
the parameter acquisition module is used for acquiring sample airfoil parameters and sample testing blade parameters;
and the pattern generation module is used for generating an initial resistance reducing device outline diagram and a resistance reducing device outline diagram and generating a three-dimensional resistance reducing device design diagram according to the sample airfoil parameters, the test blade parameters and the resistance reducing device outline diagram.
The logic calculation module is used for obtaining a three-dimensional resistance reducing device design drawing according to the sample airfoil parameters, the test blade parameters and the resistance reducing device outline drawing;
and the result output module is used for outputting the three-dimensional resistor reducing design drawing.
9. An electronic device comprising a processor and a memory, the memory having stored therein at least one instruction that is loaded and executed by the processor to implement the method of any of claims 1 to 8.
10. A computer-readable storage medium, characterized in that,
the computer readable storage medium has stored therein at least one instruction that is loaded and executed by a processor to implement the method of any one of claims 1 to 8.
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