Turbulent flows encountered in northen wind energy applications

北方风能应用中遇到的湍流

• 批准号: RGPIN-2016-03902
• 负责人: Masson, Christian
• 金额: $ 2.11万
• 依托单位: École de technologie supérieure
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=708209
• 关键词: Turbulent; flows; encountered; northen; wind

The central objective of the proposed research program is to consolidate the development of the Canadian wind energy industry by developing new knowledge and innovations related to wind turbine and wind farm aerodynamics, while providing highly trained, qualified personnel to support the competitiveness of the wind energy sector in Canada. Specifically, the research program aims to develop advanced predictive models to gain a better understanding of atmospheric turbulence, its role in the energy extraction process, and its interaction with the rotor wake. In addition, these issues are considered in the context of a northern environment where the effects of forested regions, complex orography and precipitations during cold temperature are important factors. The proposed research program thus focuses on atmospheric flows, wind turbine wakes, and factors related to Canada's Nordic climate and will involve 7 graduate students as highly qualified personel (HQP). Atmospheric flows: The proposed research program thus works towards the development and refinement of the Reynolds-averaged Navier-Stokes (RANS) turbulence closures, as well as more detailed approaches ranging from Large-Eddy Simulation (LES) methods to hybrid RANS/LES techniques. These latter methods provide a much more detailed description of the flow and greater insight into its turbulent structure and should be considered as long-term methodologies. Wakes: The contributions of the research program on wakes are to improve the wake predictive models describing the large-scale interactions in a RANS/actuator disk framework. This can be achieved by first investigating the small-scale interaction of the rotor and the wind, the so-called near wake, using LES with actuator surface or line representations of the rotor. Nordic factors: The Canadian climate and territory present special challenges. Cold precipitations can modify the aerodynamic characteristics of the atmospheric turbulent flow. Understanding and evaluating the effects of such precipitations on wind turbine wake are important. Topography is often characterized by forest cover which dissipates energy and modifies turbulent flow properties. Understanding and accurately predicting the effects of wakes, forests, and cold precipitations on atmospheric turbulent flows are of special importance to Canada.

拟议研究计划的中心目标是通过开发与风力涡轮机和风电场空气动力学相关的新知识和创新来巩固加拿大风能行业的发展，同时提供训练有素的合格人员来支持加拿大风能行业的竞争力。具体而言，该研究计划旨在开发先进的预测模型，以更好地了解大气湍流，其在能量提取过程中的作用，以及其与转子尾流的相互作用。此外，这些问题被认为是在北方环境的森林地区，复杂的地形和降水在寒冷的温度是重要因素的影响。因此，拟议的研究计划侧重于大气流动，风力涡轮机尾流，以及与加拿大的北欧气候相关的因素，并将涉及7名研究生作为高素质人员（HQP）。 大气流量：因此，拟议的研究计划的发展和完善的雷诺平均纳维尔-斯托克斯（RANS）湍流封闭，以及更详细的方法，从大涡模拟（LES）的方法，混合RANS/LES技术。后面这些方法提供了对流动的更详细的描述以及对其湍流结构的更深入的了解，应被视为长期方法。 唤醒：尾迹研究计划的贡献是改进RANS/致动盘框架中描述大尺度相互作用的尾迹预测模型。这可以通过首先研究转子和风的小尺度相互作用（所谓的近尾流）来实现，使用具有转子的致动器表面或线表示的LES。 北欧因素：加拿大的气候和领土提出了特殊的挑战。冷降水可以改变大气湍流的气动特性。了解和评估这种降水对风力涡轮机尾流的影响是很重要的。地形的特点通常是森林覆盖，它消耗能量，改变湍流特性。了解和准确预测尾流、森林和冷降水对大气湍流的影响对加拿大特别重要。