Research and development of an active unsteady flow and turbulence generation system for wind tunnels

风洞是用于汽车性能测试的重要工具。风洞用于产生飞行器所经历的准确性和可重复性的气流条件。在风洞中进行的车辆测试用于表征性能测量，如空气动力学，这对于改善燃料消耗/排放和车辆稳定性非常重要。大多数全尺寸汽车测试设施都是为了模拟理想条件而设计的，例如车辆通过静止空气时发生的情况。然而，在道路上驾驶条件受到湍流，横流或阵风，可以降低车辆的性能。 Aiolos Engineering Corporation是一家位于安大略省多伦多的加拿大公司。Aiolos是设计和建造全尺寸风洞和测试设施的世界领导者。在Aiolos和Hanson教授的研究小组（约克大学机械工程系）之间的合作伙伴关系中，将研究和开发一种用于汽车风洞的新型主动非定常流和湍流生成系统，以更好地模拟道路风况。将对主动系统产生的非定常流和湍流进行测量。将研究主动系统的几何和运动参数对所产生的流场的影响，以确定合适的组合，从而更好地模拟道路上车辆经常遇到的气流条件。从长远来看，该研究支持改善车辆性能和加拿大在风洞设计方面的竞争优势。 拟议的项目还将支持MASc学生在实验流体动力学，风洞测试和动态系统方面的培训，这些都是汽车，航空航天，风力工程和能源等行业需求的相关技能。

Wind tunnels are an important tool that are used for automotive performance testing. The wind tunnels are used to produce airflow conditions that a vehicle experiences with accuracy and repeatability. Vehicle testing performed in wind tunnels is used to characterize performance measures such as aerodynamics, which is important for improving fuel consumption/emissions and vehicle stability. Most full-scale automotive test facilities are designed to simulate ideal conditions such as a that occurring when a vehicle passes through still air. However, on-road driving conditions are subject to turbulence, cross flow or wind gusts, that can degrade a vehicle's performance. Aiolos Engineering Corporation is a Canadian company that is located in Toronto, Ontario. Aiolos is a world leader in the design and construction of full-scale wind tunnels and test facilities. In this collaborative partnership between Aiolos and Prof. Hanson's research group (in the Department of Mechanical Engineering, York University), a novel active unsteady flow and turbulence generation system for automotive wind tunnels to better simulate on-road wind conditions will be researched and developed. Measurements of the unsteady flow and turbulence produced by the active system will be carried out. The effect of geometric and motion parameters of the active system on the resulting flow fields will be studied to determine suitable combinations to better model the airflow conditions often experienced by vehicles on the road. In the long term the research supports improved vehicle performance and the Canadian competitive advantage in wind tunnel design. The proposed project will also support the training of MASc students in experimental fluid dynamics, wind tunnel testing and dynamic systems, which are relevant skills in demand by industry sectors including automotive, aerospace, wind engineering and energy.