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首页> 外文会议>Vehicle aerodynamics, 2012. >Aerodynamic Effects of Different Tire Models on a Sedan Type Passenger Car
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Aerodynamic Effects of Different Tire Models on a Sedan Type Passenger Car

机译：轿车型乘用车上不同轮胎型号的空气动力效应

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Targets for reducing emissions and improving energy efficiency present the automotive industry with many challenges. Passenger cars are by far the most common means of personal transport in the developed part of the world, and energy consumption related to personal transportation is predicted to increase significantly in the coming decades. Improved aerodynamic performance of passenger cars will be one of many important areas which will occupy engineers and researchers for the foreseeable future. The significance of wheels and wheel housings is well known today, but the relative importance of the different components has still not been fully investigated. A number of investigations highlighting the importance of proper ground simulation have been published, and recently a number of studies on improved aerodynamic design of the wheel have been presented as well. This study is an investigation of aerodynamic influences of different tires. Two different tire models were investigated in combination with three different wheel designs using the Volvo Aerodynamic Wind Tunnel; including moving ground and rotating wheels. In addition to force measurements, flow field investigations were also performed using both surface pressure probes and 12-hole pressure probes. The tire sizes investigated in this study were 215/50R17 and 215/55R16. An investigation of changes to the tire geometry for 215/55/R16 tires was also performed using two high speed cameras in the wind tunnel. Results show that different tire types have a significant effect on not only aerodynamic drag, but also on lift to some extent. Drag differences between 5-10 drag counts were measured depending on wheel and vehicle configuration. It was also concluded that the drag difference between tire types was dependent on wheel design. The flow field investigations showed noticeable changes to the front wheel wake structures as well as significant changes in the rear wheel and base wake structures. Investigations of the tire deformations showed changes in wheel lift, as well as radial expansion and axial compression correlating with the observed drag changes.
机译：减少排放和提高能源效率的目标给汽车行业带来了许多挑战。到目前为止，乘用车是世界上最常见的个人交通工具，在未来几十年中，与个人交通工具有关的能源消耗预计将大大增加。乘用车的空气动力学性能的改善将是许多重要领域之一，在可预见的未来，这将吸引工程师和研究人员。轮和轮壳的重要性在今天已广为人知，但尚未充分研究不同组件的相对重要性。已经发表了许多研究报告，这些研究报告突出了正确进行地面模拟的重要性，最近，还提出了许多有关改进车轮空气动力学设计的研究。这项研究是对不同轮胎的空气动力学影响的调查。使用沃尔沃气动风洞，结合三种不同的车轮设计，研究了两种不同的轮胎模型；包括移动地面和旋转车轮。除了进行力测量外，还使用表面压力探头和12孔压力探头进行了流场研究。在这项研究中研究的轮胎尺寸为215 / 50R17和215 / 55R16。还使用风洞中的两个高速摄像头对215/55 / R16轮胎的轮胎几何形状变化进行了调查。结果表明，不同类型的轮胎不仅对空气阻力有显着影响，而且在一定程度上对升力也有显着影响。根据车轮和车辆配置，测量了5-10个阻力计数之间的阻力差异。还得出结论，轮胎类型之间的阻力差异取决于车轮设计。流场研究表明，前轮尾流结构发生了显着变化，后轮和基础尾流结构也发生了显着变化。轮胎变形的研究表明，车轮升力的变化以及与观察到的阻力变化相关的径向膨胀和轴向压缩。

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