浓缩风能型风力发电机浓缩装置流场特性及试验  

Flow field characteristic and test on concentration device of concentrated wind energy turbine

作　　者：马广兴[1,2] 田德[1,3] 韩巧丽[1] 李明[1] 

机构地区：[1]内蒙古农业大学机电工程学院,呼和浩特010018 [2]内蒙古工业大学土木工程学院,呼和浩特010051 [3]华北电力大学可再生能源学院,北京102206

出　　处：《农业工程学报》2013年第10期57-63,F0002,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(59776033)

摘　　要：为揭示浓缩风能型风力发电机浓缩装置的流动规律,该文以浓缩装置为研究对象,进行了流场特性的理论分析、数值计算和试验研究。流体流过浓缩装置,靠壁面流体首先被加速,在中间截面前0.22m截面超过中心轴流速,之后随轴向距离加大,逐渐形成中间流速大于边缘流速的流场;中央圆筒具有以中心轴为圆心的径向流速梯度,来流风速10.74m/s时,中间截面径向流速梯度达2.35/s;近壁面形成薄薄的边界层,出现在距中央圆筒壁面50mm附近,在中间截面前0.11m截面和中间截面后0.07m截面出现波峰,波谷出现在中间截面后0.02m处。试验结果表明,数值计算结果与试验结果相符。研究结果可为完善浓缩装置和叶片的设计提供参考。The hazard of wind shear to large wind turbines cannot be ignored. Concentrated Wind Energy Turbine Generator Systems （CWETS） can increase wind energy density and improve wind energy instability. In order to reveal the flow law of wind energy in a concentrated device, theoretical analysis, numerical calculations, and experimental verification on the concentrated wind energy turbine were carried out. To start, this paper introduces the topic background, reveals the wind shear problem that large wind turbines face, summarizes the research situation of wind turbines wind shear, and presents the research status and advantages of the CWETS. Secondly, the report gives detailed analysis of the concentrated wind energy theory basis, basic thought, technical feasibility, and the relative knowledge of computational fluid dynamics. Then, the concentrated equipment is placed in uniform and parallel to the wind flow in the flow field. With the methods of numerical simulation and test-in-truck experiment, the concentrated equipment is studied. Finally, the concentrated equipment model is set in the flow field with wind speed gradient; using the methods of numerical simulation and tunnel experiment, the traditional concentrated equipment and improved concentrated equipment are studied. The results showed that there was good agreement in the numerical calculation and experiment. Conventional concentrated equipment with the central cylinder of 900mm diameter is fixed in uniform and parallel flow fields when wind fluid flows through the concentrated equipment. First, the close inner surface fluid is accelerated. At 0.22m in front of the middle section of the central cylinder, the speed of the close inner surface fluid is faster than the speed at the center axial fluid. The former speed reaches its maximum near the middle of the central cylinder; then with the axial distance increasing, the flow field comes into being, with the faster speed of the center axial fluid than that of close inner surface fluid. It also can be seen, i

关 键 词：风能 发电 流场 浓缩装置 

分 类 号：F11[经济管理—国际贸易]