某高端轿车综合空气动力学性能开发

Integrated Aerodynamic Development of a Luxury Sedan

摘要:

针对某高端运动型轿车进行包括风阻、升力和风噪等内容的综合空气动力学性能研究与产品优化。以半油泥材料全尺寸模型及其1∶1数模为研究对象，采用整车风洞试验与数值模拟仿真相结合的技术方法，对该车型的外形面、底部护板、轮毂及密封条等进行空气动力学研究，获得了风阻系数值为0.269，且行驶稳定性与风噪水平都有大幅提升的最终优化车型。此外，介绍了开发过程中获得的具体工程经验与相关理论支撑。

关键词:轿车造型;空气动力学;风洞试验;计算流体力学;升力系数

Abstract:

Integrated aerodynamic performance of a luxury sports sedan， including aerodynamic resistance， lift force， and wind noise， was studied and optimized. Taking a clay-rigid material mixed full-scale model and its 1：1 digital model as main research objects， an in-depth， full-scale wind tunnel test and numerical simulation were conduct on shape surface， bottom guard plate， aerodynamic hub and sealing strip of the vehicle. A wind resistance coefficient of 0.269， a greatly optimized driving stability， and wind noise level were obtained. This paper introduces the specific engineering experience and relevant theoretical support obtained in the development process.

Key words:vehicle engineering;aerodynamics;wind tunnel test;computational fluid dynamics;lift coefficient