聚碳酸酯材料的浓缩风能装置流固耦合分析  

Fluid-solid interaction modeling analysis of wind-energy concentration devices with polycarbonate

作　　者：田德[1] 姬忠涛[1,2] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]曲靖师范学院物理与电子工程学院,曲靖655011

出　　处：《农业工程学报》2015年第2期191-196,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家高技术研究发展计划项目(863计划)(2011AA05A104)

摘　　要：浓缩风能装置是浓缩风能型风力发电机的核心部分,其选材直接影响到浓缩风能型风力发电机的推广应用。该文应用流固耦合分析方法,采用CFD软件进行流场分析,对浓缩风能装置在特定风场下进行仿真模拟,得到了浓缩风能装置所处流场的风速和风压分布。将流场计算结果作为载荷加载到浓缩风能装置上,该装置在风中所受最大应力3.267 MPa,远小于拜耳makrolon 2407型聚碳酸酯的屈服应力66 MPa、断裂应力65 MPa以及弯曲强度98 MPa,因此该型号聚碳酸酯在强度上满足浓缩风能装置要求,可以替代目前所用材料冷轧钢板。该研究结果可为后期的结构改进和优化设计提供理论依据和参考。The concentrated wind energy device is the core of the concentrated wind energy generator, and its material can directly affect the widespread application of the concentrated wind energy generator. This research adopts a fluid-solid interaction （FSI） method. At first, a solid-field model of a concentrated wind energy device is created with the help of the CAD software according to the size of the model. And a cylindrical area is established after the solid-field model is imported into the finite element analysis software. The cylindrical area has a radius of 10 m and a length of 30 m and the distance between the inlet of the fluid-field area and the inlet of the concentrated wind energy device is 5 m. Then in the cylindrical area, a geometric fluid field is established through Boolean subtraction of the solid field area. Based on the CFD software analysis of the fluid field, the wind flow is simulated in a specific wind field. A non-uniform tetrahedron meshing and an SSTk-ω turbulence model are adopted. The fluid medium is air, with the temperature of 296.75 K, the density of 1.044 kg/m3, the pressure of 88 800 Pa, the viscosity of 1.85＆#215;10-5 kg/（m＆#183;s）, the thermal conductivity coefficient of 0.02623 W/（m·K）, and the constant-pressure specific heat capacity of 1 013 J/（kg＆#183;K）. During the simulation, the wind speed is set to 25 m/s, the mass flow rate is set to 8199.557 kg/s, and the corresponding turbulent kinetic energy and the specific dissipation rate are respectively 0.714963 m2/s2 and 24.67 s-1. The mass flow inlet and pressure flow outlet are adopted. The roughness height of surface is set to 0.3 mm. When the component residual reaches 1.0×10-4kg/s, the equation converges and the distribution of the wind speed and wind pressure in the fluid field is obtained. The result shows that the maximum wind speed that the central cylinder can work on the wind turbine blades is 35 m/s and the fluent speed increases along the radial direction of the wall, with a maximum speed of 38.

关 键 词：风能 材料 有限元法 浓缩风能装置 流固耦合 聚碳酸酯 

分 类 号：F11[经济管理—国际贸易]