Robust Aerodynamic Shape Optimization of Automotive Vehicles

汽车稳健的空气动力学形状优化

• 批准号: 538511-2019
• 负责人: Nadarajah, Sivakumaran
• 金额: $ 1.82万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=681111
• 关键词: Robust; Aerodynamic; Shape; Optimization; Automotive

The primary objective of the project is to demonstrate the application of adjoint-based aerodynamic design optimization to improve the aerodynamic performance of automotive vehicles with respect to the exterior shape of the vehicle subject to constraints on the vehicle utility and aesthetics. Aerodynamics of automotive vehicles are essentially driven by the need to reduce the pressure component of drag, where a large separated region often prevail in the rear of the vehicle. In addition secondary components such as side-view mirrors introduce obstructions and compounds on the challenge to reduce the total drag. Thus numerical methods to assess the aerodynamic performance and redesign the shape is critical to advance in this highly competitive field. Fiat Chrysler Automobiles Canada (FCA) currently employs a combination of open source computational fluid dynamics software with a commercial adjoint package to form an ADO numerical framework to achieve the stated objective. However, application of this framework has resulted into inconsistent results over the years. Moreover the approach often yields uneven surface geometries which renders the shape ineffective from an aesthetics point of view. Therefore the objective of this engagement is to demonstrate the capabilities of our in-house numerical framework on the design of a generic automotive geometry.

该项目的主要目标是展示基于伴随的空气动力学设计优化的应用，以提高汽车的空气动力学性能方面的车辆的外部形状受到车辆的实用性和美观性的约束。汽车的空气动力学本质上是由减少阻力的压力分量的需要驱动的，其中大的分离区域通常在车辆的后部占主导地位。此外，次要组件，如侧视镜引入障碍物和化合物的挑战，以减少总阻力。因此，数值方法来评估空气动力学性能和重新设计的形状是至关重要的，在这个高度竞争的领域。菲亚特克莱斯勒汽车加拿大公司（FCA）目前采用开源计算流体动力学软件与商业伴随软件包相结合，形成ADO数值框架，以实现既定目标。然而，多年来，这一框架的应用导致了不一致的结果。此外，该方法通常产生不均匀的表面几何形状，这使得形状从美学观点来看是无效的。因此，此次合作的目的是展示我们内部的数字框架在通用汽车几何设计上的能力。