Robust Aerodynamic Shape Optimization of Automotive Vehicles

汽车稳健的空气动力学形状优化

基本信息

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

项目摘要

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.

该项目的主要目的是证明基于伴随的空气动力学设计优化的应用，以提高汽车车辆的空气动力学性能，相对于车辆的外部形状，对车辆效用和美学的限制受到约束。汽车车辆的空气动力学基本上是由减少阻力组件的压力组成部分的驱动，在车辆后部，大型分离的区域通常占上风。另外，诸如侧视镜之类的次要组件会引入挑战的障碍物和化合物，以减少总阻力。因此，评估空气动力学性能并重新设计形状的数值方法对于在这个高度竞争的领域中的发展至关重要。菲亚特·克莱斯勒汽车加拿大（FCA）目前使用开源计算流体动力学软件与商业伴随软件包的组合，以形成一个ADO数值框架，以实现既定目标。但是，多年来，该框架的应用导致结果不一致。此外，该方法通常会产生不平衡的表面几何形状，从美学的角度使形状无效。因此，这种参与的目的是证明我们内部数值框架在通用汽车几何形状设计上的功能。