浓缩风能装置扩散管流场模拟验证及其凸缘结构优化设计

发布时间：2018-01-30 16:30

  本文关键词： 风能 流场 数值模拟 浓缩风能装置 扩散管 凸缘　出处：《农业工程学报》2017年18期 　论文类型：期刊论文

【摘要】：浓缩风能装置的扩散管结构直接影响浓缩风能型风电机组的输出功率。为提高浓缩风能装置的浓缩效率,以浓缩风能装置为研究对象,采用数值模拟方法,研究扩散管凸缘的几何参数对浓缩风能装置内部流场特性的影响规律;并通过试验验证数值模拟的可靠性。结果表明:扩散管凸缘结构能够明显提高浓缩风能装置对自然风的加速作用和风能利用率;且装置内部流场的流速和风轮扫掠面积上的可利用风能随着凸缘高度L的增加而增大。综合分析可得,带有L为450 mm、凸缘角度α为+9°的扩散管凸缘的浓缩风能装置模型流场流速和可利用风能较高;与原始模型相比,其内部流场最大流速提高了30.738%,可利用风能提高了84.26%,是所研究模型中流场性能较佳的浓缩风能装置结构。
[Abstract]:The diffusion-tube structure of the concentrated wind energy plant directly affects the output power of the concentrated wind power unit. In order to improve the concentration efficiency of the concentrated wind energy unit, the concentrated wind energy unit is taken as the research object and the numerical simulation method is adopted. The influence of the geometric parameters of the flange of the diffusion-tube on the flow field characteristics of the concentrated wind energy plant is studied. The reliability of the numerical simulation is verified by experiments. The results show that the diffusion-tube flange structure can obviously improve the acceleration of natural wind and the utilization rate of wind energy. The available wind energy increases with the increase of flange height L in the flow field and swept area of the wind turbine. The comprehensive analysis shows that the wind energy with L is 450 mm. The model of concentrated wind energy device with flange of diffusion tube with flange angle 伪 = 9 掳has high flow velocity and available wind energy. Compared with the original model, the maximum velocity of the internal flow field is increased by 30.738, and the wind energy is increased by 84.26. It is a concentrated wind energy device with better flow field performance in the studied model.
【作者单位】： 新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家科技支撑计划资助项目(2009BAA22B02) 中央高校基本科研业务费专项资金资助(2016XS56)
【分类号】：TM315
【正文快照】： 0引言浓缩风能装置是浓缩风能型风电机组[1-8]的核心部件,而扩散管凸缘能够增强浓缩风能装置的抽吸作用,提高浓缩风能装置内部流场的流体流速,同时降低装置内部的风能波动性,提高机组的风力发电质量。为提高浓缩风能型风电机组的发电效率、降低机组发电成本,许多国内外研究人，

本文编号：1476695