Analysis of Wake Induced Dynamic Stall on Wind Turbine Blades
风力发电机叶片尾流引起的动态失速分析
基本信息
- 批准号:218742980
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2012
- 资助国家:德国
- 起止时间:2011-12-31 至 2019-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Dynamic stall phenomena on wind turbine blades generated by unsteady inflow conditions from upstream turbine wakes or atmospheric boundary layer fluctuations will be investigated. In the first project phase, wind turbine wakes were analyzed with the focus on the tip and hub vortices. The wake was predicted based on large-eddy simulations. Active control has been applied to excite unstable modes in the turbulent wake to minimize dynamic loads on turbine blades in wind farm installations. A major source of unsteady loads on wind turbine blades is flow separation which frequently happens under unsteady inflow conditions caused by wakes generated by upstream installed turbines or atmospheric turbulence. That is, detailed data of dynamic stall on wind turbine blades are necessary to extend dynamic stall models to perturbed inflow conditions and rotating configurations. The objective of this proposal is to improve the understanding and modeling of dynamic stall phenomena for typical wind turbine applications. In addition, the influence of dynamic stall on the wake turbulence will be analyzed. This knowledge will enable more accurate predictions of structural loads and the power output of a wind turbine. The dynamic stall on the turbine blade will be investigated by large-eddy simulations based on hybrid structured body-fitted and unstructured Cartesian meshes, such that the flow features including boundary layer growth, separation, transition to turbulence and flow reattachment can be captured accurately. Dynamic mode decomposition will be used to analyze the individual modes occurring at stall and in the wake dynamics. These simulations complement the measurements conducted by the TU Darmstadt and Univ. Oldenburg to reduce dynamic stall effects by an adaptive camber also for sweep conditions. Furthermore, simulations for the wind turbine model from the TU Berlin will be performed.
将研究由上游涡轮机尾流或大气边界层波动的非定常流入条件产生的风力涡轮机叶片上的动态失速现象。在第一个项目阶段,分析了风力涡轮机尾流,重点是叶尖和轮毂涡。尾流是根据大涡模拟预测的。主动控制已被应用于激发湍流尾流中的不稳定模式,以最大限度地减少风电场装置中涡轮机叶片上的动态载荷。风力涡轮机叶片上的非定常载荷的主要来源是流动分离,流动分离经常发生在由上游安装的涡轮机或大气湍流产生的尾流引起的非定常流入条件下。也就是说,风力涡轮机叶片上动态失速的详细数据对于将动态失速模型扩展到扰动入流条件和旋转配置是必要的。本提案的目的是提高对典型风力涡轮机应用动态失速现象的理解和建模。此外,还分析了动态失速对尾流湍流度的影响。这些知识将使得能够更准确地预测风力涡轮机的结构负载和功率输出。涡轮机叶片上的动态失速将通过基于混合结构化贴体和非结构化笛卡尔网格的大涡模拟来研究,以便能够准确地捕获流动特征,包括边界层生长、分离、向湍流的转变和流动再附着。动态模态分解将用于分析失速时和尾流动态中出现的各个模态。这些模拟补充了达姆施塔特工业大学和奥尔登堡大学进行的测量,以通过自适应弯度减少动态失速效应,也适用于后掠条件。此外,还将对柏林工业大学的风力涡轮机模型进行模拟。
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Numerical analysis of the effect of flaps on the tip vortex of a wind turbine blade
- DOI:10.1016/j.ijheatfluidflow.2019.05.004
- 发表时间:2019-06
- 期刊:
- 影响因子:2.6
- 作者:X. Huang;S. M. A. Moghadam;P. Meysonnat;M. Meinke;W. Schröder
- 通讯作者:X. Huang;S. M. A. Moghadam;P. Meysonnat;M. Meinke;W. Schröder
Numerical and Experimental Investigation of Wind Turbine Wakes
风力涡轮机尾流的数值和实验研究
- DOI:10.2514/6.2015-2310
- 发表时间:2015
- 期刊:
- 影响因子:0
- 作者:X. Huang;S. Vey;M. Meinke;W. Schröder;G. Pechlivanoglou;C. Nayeri;C. Paschereit
- 通讯作者:C. Paschereit
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Professor Dr.-Ing. Wolfgang Schröder其他文献
Professor Dr.-Ing. Wolfgang Schröder的其他文献
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