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首页> 外文期刊>SAE International Journal of Passenger Cars - Mechanical Systems >Aerodynamic Interaction Effects and Surface Pressure Distribution During On-Road Driving Events
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Aerodynamic Interaction Effects and Surface Pressure Distribution During On-Road Driving Events

机译：公路行驶过程中的空气动力相互作用和表面压力分布

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摘要

Temporal changes of the onset flow field during on-road driving events, such as overtaking and passing, causes a complex interaction between aerodynamics of two vehicles. This can affect vehicle dynamics as well as steering input from the driver. In extreme situations this can cause a risk to driving comfort and safety. In order to optimize the shape of a vehicle, a fundamental understanding of the underlying pressure distribution during these scenarios is necessary. This paper describes the experimental method to measure the surface pressure and vehicle motion during overtaking a vehicle and passing a vehicle on a proving ground. Two primary vehicles, a C-Hatchback and a B-Crossover, were instrumented and a medium sized van and a 3.5 t truck were used as secondary vehicles without instrumentation. The highly asymmetric pressure distribution acting on the primary vehicles during the driving events is characterized using a simplified illustration method. The pressure experienced by the test vehicles were qualitatively the same, but were more severe when passed or overtaken by vehicles with a larger displacement area and corresponding vehicle front end pressure field.
机译：在道路驾驶事件中，例如超车和通过，起始流场的时间变化会导致两辆车的空气动力学之间发生复杂的相互作用。这会影响车辆动力学以及驾驶员的转向输入。在极端情况下，这可能会导致驾驶舒适性和安全性风险。为了优化车辆的形状，必须对这些情况下的基本压力分布有基本的了解。本文介绍了一种测量车辆超车和在试验场上通过车辆时的表面压力和车辆运动的实验方法。配备了两辆主要的车辆，一辆C型掀背车和一辆B型跨界车，一辆中型货车和一辆3.5吨的卡车被用作没有仪表的二手车。在驾驶过程中作用在主车辆上的高度不对称压力分布使用简化的图示方法进行了表征。测试车辆所经历的压力在质量上是相同的，但是当被具有更大位移面积和相应的车辆前端压力场的车辆通过或超越时，压力会更大。

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