Wind turbine pneumatic and structural CAD software

Wind turbine aerodynamics and structure, tax software Liu Xiong, Chen Yan, Ma Wei 1 Ye Zhiquan Shantou University Energy Science Institute, Shantou 5150fflmln! . The software implements database management of airfoil aerodynamic data and section coordinate data. Adopt strip theory. Consider the angular interference factor. The influence of factors such as the actual wind shear yaw on the aerodynamic performance of the wind turbine is calculated, and the aerodynamic performance of the wind turbine is calculated. Based on this, the overall optimization design method of the aerodynamic shape of the horizontal axis wind turbine blade is developed.

0 Introduction Wind energy as a clean and renewable new energy source, with the social claws; in October 999 statistics, as of October 1999, the world's wind power installed capacity has reached 1.779 million 1 to, medium, up to 246,000 It is said that China is a home with abundant wind energy resources, and the country's development of 1 energy resource is 253 million with the resources for large-scale development of wind power. The Chinese government attaches great importance to the development of new energy. The State Power Corporation has taken the development of wind power as a power industry.

The aerodynamic shape design and energy analysis of wind turbine wind turbines are indispensable means for wind turbines. In terms of wind turbine design and calculation software, it is still very scarce in China, and the independent development capability of large-scale wind turbines is still weak. Most of the wind farms in the country use wind turbines imported from abroad. The domestic blade manufacturers also lack the design of the blade. The manufacturing process of the wind turbine blade is still in the imitation stage. The object-oriented method base is adopted for the wind turbine aerodynamic and structural design software of the national nine science and technology research project. The 32 platform integrates a set of wind turbine pneumatics and structure 1 software 81 ring waste as a development tool, each module of the development software, 1 software structure 1.1 software module composition juice and aerodynamic performance juice calculation 3 base wood modules, airfoil The database implements the airfoil coordinate data and the aerodynamic data. Provides the necessary blade section airfoil data for performance calculations and optimized designs.

The aerodynamic performance calculation module calculates the overall force and aerodynamic performance of the wind turbines of each section of the blade and the force of the tower according to the given overall parameters of the wind turbine and the airfoil parameters of the section. The aerodynamic and structural optimization design module designs a blade with a reasonable structure and high wind energy utilization efficiency according to the required aerodynamic performance. Optimizing the design requires a foundation for aerodynamic calculations, as each set of blade profile data requires aerodynamic calculation modules to calculate its aerodynamic performance during the optimization process.

1 Received date 200039 fund project National Natural Science Foundation 59976 out of 0 and Guangdong Natural Science Foundation Pneumatics blade design dimension modeling aerodynamic structure optimization 1.2 program basic process software to achieve the main function is to optimize the design of wind turbine blades And evaluate the design results after the design is completed.

The main flow of the program 2.

1.3 The functional structure of the software can project documents, print the blade set juice function, the blade shape, the new process, the 01, the 1 method, the sharp speed, the print, the print, the print, the print, the airfoil series, and the airfoil series are not limited to the species. . The change of the section airfoil leads to the aerodynamic data of each section, which brings difficulties to the design and calculation. Mainly the following two aspects of the previous airfoil aerodynamic data are provided in the form of documents, which is very inflexible. In the design or calculation, changes in the number of sections or changes in the airfoil nickname will result in a large history of data files. Manually changing the airfoil data files is extremely inconvenient.

In each airfoil series, the airfoil manual usually only provides aerodynamic data for a few standard thickness airfoils. The airfoil of this section is usually not standard. Therefore, Pu will use interpolation method to obtain pneumatic data. It is inconvenient and inflexible to interpolate with pneumatic data provided by file method.

Because the aerodynamic data is very important for design and calculation, in order to solve the above problem, the software will automatically extract the airfoil data from the data port of Tanzeng Data, and automatically interpolate the data for the non-standard airfoil. The airfoil database established in this paper supports the popular 10 series wing and flutter, and the series Tan Tan, with good scalability and support for the addition of various airfoils.

The number of airfoil is composed of the contour index and the airfoil aerodynamic data, and the structure of the database adopts the river raft.

Change the name. Weiyue grid is installed by opening the workmanship and saving the project nu. The design is designed according to the chord length performance influencing factors, the function of the aerodynamic performance calculation function and the aerodynamic performance analysis function.

Distribution of software functional structure 3.

2 Module introduction Airfoil database The blade used by modern wind turbines, the airfoil changes along the blade direction, usually the root section airfoil is thicker, and the tip airfoil is thinner, the aerodynamic performance evaluation of the paddle structure is evaluated. It is an important ring in wind turbine design and calibration. After designing the aerodynamic shape of the blade, calculating its aerodynamic performance can be used as an evaluation of the design result. Conversely, the aerodynamic performance calculation result can be used as feedback to provide data wind turbine blade strength stiffness and stability for correcting the blade dynamic profile. The check is also dependent on the results of the aerodynamic calculation. Wind turbines are affected by many factors in actual operation, such as yaw tower shadows. Therefore, it is necessary to calculate the aerodynamic performance of the design of the award leaf based on the fixed calculation model on the basis of considering these factors.

The software uses the strip theory 3 to calculate the aerodynamic performance of the wind turbine. On the basis of the blade theory and momentum theory of 1 and 1, considering the influence of angle interference coefficient, real wind shear yaw and other factors on the aerodynamic performance of the wind turbine, and considering various losses affecting the aerodynamic performance of the wind turbine, software The metering module can transmit the speed inducing factor of each section of the following number of blades, the angle of attack, the tip loss of the blade, the relative torque of the wind speed, the wind force, the torque, the power factor of the torque, and the tower;

Using software to calculate the performance of a variety of wind turbines, the result 60, the actual curve of the wind turbine power factor and the theoretical calculation curve, the calculated maximum error is 8, in the rated 2.3 pneumatic and structural optimization design software to provide a variety of optimization design Method 0131 Method 1 method and overall optimization design method.

Methods Their model is based on the disk theory and the leaf theory. The design goal is to design the most power factor for each cross section. The time method and the S180 method do not consider the parameter constraints between the design sections and the overall wind condition of the wind field. Therefore, the designed blade has the following disadvantages: the installation angle and the chord length are large near the blade root, and the blade is distorted. It is very powerful and does not meet the processing requirements. It requires a large man-made correction.

The designed blade can not meet the performance requirements, and needs to be reversed and tested.

The traditional blade optimization design method has been widely used in early wind turbine design, and the designed blade can obtain a large power coefficient near the design point. However, this design method is also not optimal because it ignores the constraints between the wind section wind blade sections. In view of the extensive application of the traditional methods in the past, the method and the 18 method are also used as reference methods to provide selection and comparison for the traditional design methods. This paper calculates the aerodynamic performance of the wind turbine based on the strip theory, with various sections of the blade. The chord length and the torsion angle are design variables, taking into account the constraint between the aerodynamic characteristics of the blade section and the annual distribution of the wind speed. The wind turbine method software uses the complex method 4 as the optimization search method. It is verified by design examples that this method has great advantages.

The overall optimization method of the application software is set to 6001 wind turbine blade, and the overall parameter reference of the wind turbine is designed. The blade airfoil parameters of the wind turbine are designed with reference to the 1600 wind turbine's 9 blades. The wind condition is based on the distribution curve of the wind speed of the Nanao wind farm. The wind speed distribution curve of the hail shape parameter of the Australian wind farm can be seen from the wind speed. Mainly distributed between 318 and 15, between. 7 and 8 are good for comparing the cross-section chord length and torsion angle data of the design award leaf with the data of the pass 19, and the satisfactory cross-section chord length and torsion angle distribution are obtained.

The performance comparison curve of the machine. It can be seen that the design of the wind turbine and the commercial product performance is in good agreement, because the design is aimed at the wind speed distribution curve of the South Australian wind farm, and the wind speed between 5 and 1518 indicates the correctness of the design model and the feasibility of the design result. In the high-speed ratio zone, ie, the low wind speed zone, the power factor of the designed wind turbine is lower than NM600kWMjJL.ijiujNM6OkW4jtiLWfftiitt can be superior to the design wind turbine. This is because the wind turbine designed in this paper is a wind energy-rich area for the South Australian wind farm with an average annual wind speed. If you consider this machine to be used in wind farms with low average wind speed, for better low speed performance. You can pay a fine adjustment for the juice.

3 Conclusions The management of airfoil data The database and its interface solve the problem of difficult maintenance of airfoil data in aerodynamic calculation and structural design, and realize the interpolation of non-standard airfoil to fully expand the airfoil selection in design and calculation. The flexibility saves a lot of time in the past for preparing airfoil data.

Pneumatic performance calculation. The calculation model adopted fully considers the various interference factors in the actual operation of the wind turbine, and divides it again, disgusting with the jewels, 胗 1 跑 砸 ,, and a good number of palm squeaking, performance It shows a high degree of accuracy. The model can be used to estimate the various aerodynamic performance of the blade and to provide a data base blade overall optimization design for wind turbine calibration and overall optimization of the wind turbine. The overall optimization design method of the developed wind turbine blade is based on the performance requirements of the machine. The wind speed distribution function of the wind field, with the maximum annual energy output as the target, automatically searches for the blade structure that meets the performance requirements, and the designed blade structure is reasonable, easy, and processed. Less human repair, the actual calculation and design comparison verification, the software has a high commercial reality.

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