Research of Notchback Automobile Wake Structure
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摘要: 轿车的气动阻力对轿车的燃油经济性有着重要影响.对于折背式轿车,由尾部产生的气动阻力可占整个外形气动阻力的50%.因此,弄清折背式轿车的尾流结构对开发具有良好气动特性的新型轿车有重要意义.利用风洞试验和CFD(Computational Fluid Dynamics)技术相结合,分析了折背式轿车的尾流结构及尾部形状对尾流结构的影响,为设计具有良好气动特性的折背式轿车提供了依据.Abstract: The aerodynamical drag of a automobile directly influences its fuel comsumption. For a notchback automobile, its aerodynamical drag relateded with the rear shape amounts to nearly 50 percent of the total aerodynamical drag. Therefore, it is important to make the wake structure clear for designing automobile with good aerodynamic characteristics. The wake structure of notchback automobile and the influence of the rear shape on the structure were analyzed. The result is quite striking for designing new type notchback automobile with good aerodynamic characteristics.
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Key words:
- wakes /
- wind tunnel tests /
- numerical simulation
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[1] Hcho W. Aerodynamics of road vehicle[M]. Butterworth:Society of Automotive Engineers Inc,1998.174~175. [2]Saha A K, Biswas G, Muralidhar K. Numerical study of the turbulent unsteady wake behind a partially enclosed square cylinder using RANS[J].Computer Methods in Applied Mechanics and Engineering,1999,178:323~341. -
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