Numerical flow analysis of vertical axis wind turbines with morphing airfoils

变形翼型垂直轴风力发电机数值流分析

• 批准号: RGPIN-2017-06694
• 负责人: Paraschivoiu, Marius
• 金额: $ 1.6万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638914
• 关键词: Numerical; flow; analysis; vertical; axis

A morphing airfoil has the ability to change its geometry in order to optimize the aerodynamic forces for a specific operating flow condition. This technology can be very effective when applied to vertical axis wind turbines (VAWTs), because the blades of these turbines encounter different angles of attack as they rotate. Variable pitch technology has been investigated in the past for the same purpose, but it is mechanically more difficult to implement and offers less flexibility than morphing airfoils. Control of the morphing shape is easier to implement and has a greater potential for optimizing the instantaneous torque generated by each blade. The proposed research will investigate morphing airfoils that change the geometry of the trailing edge, and therefore the camber line of the airfoil. Changing the geometry can be used to prevent dynamic stall, to increase power extraction in the leeward portion of the rotation, to distribute the load over the rotation cycle or as a breaking system. This research plan proposes an approach to understand the influence of morphing the geometry, in particular during dynamics stall. It also includes the development of a computational tool for predicting the power extracted by a VAWT for different morphing strategies.

变形翼型有能力改变其几何形状，以优化特定操作流条件下的空气动力。当应用于垂直轴风力涡轮机（VAWTs）时，这项技术可以非常有效，因为这些涡轮机的叶片在旋转时会遇到不同的迎角。变螺距技术在过去已经研究了相同的目的，但它在机械上更难实现，并提供比变形翼型更少的灵活性。变形形状的控制更容易实现，并且具有优化每个叶片产生的瞬时扭矩的更大潜力。提出的研究将调查变形翼型，改变几何形状的后缘，因此弧度线的翼型。改变几何形状可用于防止动态失速，增加旋转背风部分的功率提取，在旋转周期内分配负载或作为断裂系统。本研究计划提出了一种方法来理解变形几何的影响，特别是在动态失速期间。它还包括一个计算工具的开发，用于预测VAWT对不同变形策略提取的功率。