High Speed Data Acquisition for Transient Aerodynamics

本项目旨在利用先进的数据采集技术来评估汽车的瞬态空气动力响应。大多数汽车风洞在相对较低的频率下采样，然后对数据进行平均，以获得可重复的结果。新系统旨在提供超过200 Hz的高频力数据的瞬态输出，从而提供有关车辆空气动力学行为的更多信息。最新的分离涡模拟（DES）计算流体动力学（CFD）技术将提供对工作机制的深入了解，该技术可提供车辆周围气流的详细、随时间变化的预测。这两种技术的结合有可能为汽车工业带来阻力（以及排放）和稳定性方面的好处，同样的技术也可以应用于建筑和航空航天工业。

This project aims to use cutting edge data acquisition technology to evaluate the transient aerodynamic response of automotive vehicles. Most automotive wind tunnels sample at relatively low frequencies and then average the data to give repeatable results. The new system is designed to provide transient output of the force data at high frequencies, in excess of 200Hz, giving much more information about the aerodynamic behaviour of the vehicle. Insight into the mechanisms at work will be provided by the latest Detached Eddy Simulation (DES) Computational Fluid Dynamics (CFD) techniques which provide detailed, time-dependent predictions of the airflow around a vehicle. A combination of the two techniques has the potential to deliver drag (and hence emissions) and stability benefits to the automotive industry the same techniques can be applied to the building and aerospace industries.