Further insights into the dynamics and interactions of unsteady 3D vortical flows

进一步深入了解非定常 3D 涡流的动力学和相互作用

• 批准号: RGPIN-2022-04376
• 负责人: Fellouah, Hachimi
• 金额: $ 2.33万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754437
• 关键词: Further; insights; into; dynamics; interactions

The unsteady three-dimensional (3D) flow and their interactions with streamlined and bluff bodies are omnipresent and their characterization is crucial for the understanding of various fundamental and industrial processes such as; aircraft propulsion, transportation and wind energy generation. Unsteady 3D vortical structures are essentially characterized by complex multi-physics flow phenomena and instabilities. The overarching objective of the proposed research program is to further the current fundamental knowledge on the dynamics and the physical mechanisms governing complex 3D vortical flow phenomena and their interactions with streamlined and bluff bodies. The outcome of the proposed research work would be particularly beneficial for peer researchers and expert end-users in aerospace industries (Bell Textron Canada LTÉE, Bombardier) and energy sector (Hydro Quebec, LM Wind Power Canada Inc). The proposed research program will be mainly conducted in the large wind tunnel located at the Université de Sherbrooke (UDS). It has a closed test section of 1.82 m x 1.82 m and a top speed of the air flow is around 30 m/s that can be increased to around 42 m/s in the reduced section of 1.2 m x 1.82 m. State-of-the-art flow diagnostics techniques including; Hot Wire Anemometry (HWA) and Stereoscopic Particle Image Velocimetry (PIV), will be used to elucidate the spatiotemporal dynamics of unsteady 3D turbulent structures. The effect of flow parameters such as; Reynolds number, free stream turbulence, pressure gradient, ground effect, etc., will be evaluated. Highly qualified personnel (HQP) of different levels (PhD, Master and Undergraduate students) will be extensively trained to gain advanced skills and expertise in demand from many high-technology sectors in Canada (aerospace, wind energy production, etc.). HQP will benefit from a dynamic and a stimulating working environment at the Department of Mechanical Engineering of the UDS wherein advanced training programs are offered to acquire transversal competencies.

非定常三维（3D）流及其与流线型和海崖体的相互作用是无所不在的，它们的表征对于理解各种基础和工业过程至关重要，例如：飞机推进，运输和风能发电。非定常三维涡结构的本质特征是复杂的多物理场流动现象和不稳定性。拟议的研究计划的总体目标是进一步的动力学和复杂的三维涡流现象及其与流线型和海崖体的相互作用的物理机制，目前的基础知识。拟议研究工作的成果将特别有利于航空航天工业（Bell Textron Canada LTEE、庞巴迪）和能源部门（Hydro魁北克、LM Wind Power Canada Inc）的同行研究人员和专家最终用户。拟议的研究计划将主要在位于舍布鲁克大学（UDS）的大型风洞中进行。它有一个1.82 m x 1.82 m的封闭测试段，气流的最高速度约为30 m/s，在1.2 m x 1.82 m的缩小段中可以增加到约42 m/s。国家的最先进的流动诊断技术，包括;热线风速仪（HWA）和立体粒子图像测速（PIV），将被用来阐明非定常三维湍流结构的时空动力学。雷诺数、自由流湍流、压力梯度、地面效应等流动参数的影响，将被评估。不同级别的高素质人员（HQP）（博士，硕士和本科生）将接受广泛的培训，以获得加拿大许多高科技部门（航空航天，风能生产等）所需的先进技能和专业知识。HQP将受益于UDS机械工程系充满活力和激励的工作环境，其中提供高级培训课程以获得横向能力。