Maximising Aerodynamic Efficiency of BEV SUV underfloors

电池电动汽车(BEV)是汽车制造商履行二氧化碳排放义务的核心。此外，新内燃机汽车的销售正在被逐步淘汰。驾驭这一转变需要客户接受，续航里程是一个关键因素，这一点受到空气动力学阻力的强烈影响。虽然BEV为降低地板下的阻力提供了新的机会，但SUV仍必须提供具有成本效益的后悬架的越野性能，导致其暴露在气流中：阻力和里程惩罚。对铰接性和越野稳定性的要求意味着传统的底盘或盖子不是有效的解决方案。本项目旨在(1)确定底流、后悬架、扩散器、车轮和后尾流系统之间的相互作用；(2)开发流动控制策略(例如，涡流发生器、可展开、可变形和变形表面)，以减少悬挂系统的阻力影响，优化后扩散器作为尾流控制策略的一部分。

Battery Electric Vehicles (BEV) are central to automotive manufacturers meeting their CO2 emissions obligations. Also, the sale of new internal combustion engine cars is being phased out. Navigating this transition requires customer acceptance with range a key factor, which is strongly influenced by aerodynamic drag.While BEVs provide new opportunities for lower drag underfloors SUVs must still deliver off-road performance with a rear suspension which is cost-effective, leading it to be exposed to the airflow: a drag and range penalty. Requirements for articulation and off-road robustness mean that conventional undertrays or covers are not effective solutions.This project aims to (1) identify the interactions between underfloor flow, rear suspension, diffuser, wheel and rear wake systems; (2) develop flow control strategies (e.g., vortex generators, deployable, deformable and morphing surfaces) reducing the drag impact of the suspension system, optimising the benefits of a rear diffuser as part of a wake control strategy.