不同尾翼两厢轿车的气动特性数值模拟

Aerodynamic numerical simulation of hatch-back car with different spoilers

为了研究尾翼对汽车气动性能的影响,建立两厢轿车简化后的三维模型,为其设计了三种造型不同的汽车尾翼。使用商业的CFD软件——ANSYS Fluent,对安装了三种不同尾翼的两厢轿车的外部流场进行三维空气动力学数值模拟。文中综合造型、动力性、经济性、稳定性对结果进行对比,分析安装这三种尾翼时两厢轿车的空气动力学特性差异以及产生这些差异的主要原因,选出其中综合性能最理想的尾翼造型。

A 3-D model was built for a simplified hatch-back car to study the effects of the spoiler on car aerodynamic performance. The aerodynamic numerical simulations were done for the hatch-back car external flows using 3 spoilers with different shapes by means of the commercial CFD code ANSYS Fluent. The dynamic performance, economic benefit and operational stability of the spoilers were evaluated comparatively, and the reasons for the differences were discussed. The best car spoiler with optimal comprehensive performance was found.