Aerodynamic Effects of Different Tire Models on a Sedan Type Passenger Car

Aerodynamic Effects of Different Tire Models on a Sedan Type Passenger Car
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不同轮胎型号对轿车型客车的气动影响

DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
L. Löfdahl
L. Löfdahl
中科院分区：
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文献类型：
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作者：
Christoffer Landström;Linda Josefsson;T. Walker;L. Löfdahl

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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。乘用车 是到目前为止世界发达地区最常见的个人交通工具，能源消耗与 预计未来几十年，个人交通工具将大幅增加。改善乘客的空气动力学性能 在可预见的未来，汽车将是工程师和研究人员关注的众多重要领域之一。 轮子和轮壳的重要性在今天是众所周知的，但不同部件的相对重要性仍然 没有得到充分的调查。一些强调适当的地面模拟的重要性的调查已经公布， 最近，也出现了一些关于改进车轮气动设计的研究。 本研究旨在探讨不同轮胎对空气动力性能的影响。调查了两种不同型号的轮胎。 结合使用沃尔沃气动风洞的三种不同的车轮设计；包括移动地面和旋转 轮子。除了测力外，还使用表面压力探头和12个压力探头进行了流场研究。 孔压探头。本研究调查的轮胎尺寸分别为215/50R17和215/55R16。关于轮胎更换的一项调查 215/55/R16轮胎的几何形状也是在风洞中使用两个高速摄像机进行的。 结果表明，不同类型的轮胎不仅对气动阻力有显著影响，而且对升力也有一定的影响。拖曳 根据车轮和车辆配置的不同，测量了5-10个阻力计数之间的差异。还得出结论说， 轮胎类型之间的阻力差取决于车轮设计。流场调查显示出明显的变化 前轮尾迹结构以及后轮和底座尾迹结构的显著变化。对轮胎的调查 变形显示了车轮升力的变化，以及与观测到的阻力相关的径向膨胀和轴向压缩。 改变。
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 tyres. Two different tyre 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 tyre sizes investigated in this study were 215/50R17 and 215/55R16. An investigation of changes to the tyre geometry for 215/55/R16 tyres was also performed using two high speed cameras in the wind tunnel. Results show that different tyre 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 tyre 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 tyre deformations showed changes in wheel lift, as well as radial expansion and axial compression correlating with the observed drag changes.