Aerodynamics of vertical axis wind turbines

垂直轴风力发电机的空气动力学

• 批准号: RGPIN-2015-06383
• 负责人: Tullis, Stephen
• 金额: $ 1.6万
• 依托单位: McMaster 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=638933
• 关键词: Aerodynamics; vertical; axis; wind; turbines

Two of the main engineering limits on wind turbine utilization are power performance, particularly for smaller turbines, and aerodynamically driven vibration for both large and small turbines. The proposed research program is an investigation of the aerodynamics of vertical axis wind turbines (VAWTs). Emphasis here is on medium- and high-solidity turbines where higher solidities can be used to lower turbine rotational speeds, reducing noise and allowing better avoidance of resonance vibration. Higher solidities, however, lead to very complex flows through the turbine and around the blades, including: high blade angles of attack, dynamic stall with massive flow separation, blade-wake interactions and non-uniform diversion of the wind around the turbine. The unsteady aerodynamic loads from these flows have components that both provide turbine power and excite vibrations. My group is one of only two in the world examining vibration excitation as well as turbine power even though turbine vibration has been the main impediment to the extensive use of VAWTs. The objectives of this research program are to increase understanding of the flows around these turbines, and exploit those flows to produce lower vibration, higher efficiency turbines.

风力涡轮机利用的两个主要工程限制是动力性能，特别是对于小型涡轮机，以及大型和小型涡轮机的空气动力学驱动振动。提出的研究计划是对垂直轴风力涡轮机（VAWTs）的空气动力学进行调查。这里的重点是中、高固体度的涡轮机，高固体度可以用来降低涡轮机的转速，降低噪音，更好地避免共振振动。然而，较高的凝固度会导致通过涡轮和叶片周围的非常复杂的流动，包括：叶片大迎角、大量流动分离的动态失速、叶片-尾迹相互作用以及涡轮周围风的不均匀导流。来自这些气流的非定常气动载荷具有既提供涡轮动力又激发振动的成分。我的小组是世界上仅有的两个研究振动激励和涡轮动力的小组之一，尽管涡轮振动一直是vawt广泛使用的主要障碍。这项研究计划的目的是增加对这些涡轮机周围流动的了解，并利用这些流动来生产低振动、高效率的涡轮机。