Aerodynamic analysis of an isolated vehicle wheel
Aerodynamic analysis of an isolated vehicle wheel
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孤立车轮的空气动力学分析
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Karczewski
中科院分区：
文献类型：
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作者：
P. Leśniewicz;M. Kulak;M. Karczewski
不断上涨的燃料价格迫使制造商研究汽车空气动力学的各个方面，包括车轮，轮胎和轮辋，以尽量减少阻力。通过减小车辆的气动阻力，可以降低燃油消耗，同时提高驾驶安全性和舒适性。为了正确说明旋转车轮空气动力学对车身的影响，应事先对孤立车轮进行精确分析。为了表示车轮与地面接触时的旋转，应进行包括移动壁边界和多参考系的CFD模拟。滑动网格方法是受欢迎的，但目前成本太高。在模拟过程中获得的全球和局部流量进行了比较，以评估数值模型的有效性的实验。调查结果表明，依赖性的模拟和系数（阻力和升力）的类型。MRF方法被证明是一个更好的解决方案，使结果更接近实验。研究车轮与地面接触面积的模型有助于说明旋转车轮空气动力学对车身的影响。
Increasing fuel prices force the manufacturers to look into all aspects of car aerodynamics including wheels, tyres and rims in order to minimize their drag. By diminishing the aerodynamic drag of vehicle the fuel consumption will decrease, while driving safety and comfort will improve. In order to properly illustrate the impact of a rotating wheel aerodynamics on the car body, precise analysis of an isolated wheel should be performed beforehand. In order to represent wheel rotation in contact with the ground, presented CFD simulations included Moving Wall boundary as well as Multiple Reference Frame should be performed. Sliding mesh approach is favoured but too costly at the moment. Global and local flow quantities obtained during simulations were compared to an experiment in order to assess the validity of the numerical model. Results of investigation illustrates dependency between type of simulation and coefficients (drag and lift). MRF approach proved to be a better solution giving result closer to experiment. Investigation of the model with contact area between the wheel and the ground helps to illustrate the impact of rotating wheel aerodynamics on the car body.