折背式轿车尾流结构研究

Research of Notchback Automobile Wake Structure

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 5 0 % .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(ComputationalFluidDynamics)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 .

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.