旋转车轮对整车气动性能的影响评价

Influence of Rotating Wheels on Vehicle Aerodynamics

摘要:

为研究整车轮边流场结构特征，以不同尾部造型形式的简单车体和复杂车体为研究对象，分别对静止和旋转车轮工况进行了数值研究.计算采用定常雷诺时均纳维斯托克斯方程.针对数值计算结果，通过对静止及旋转车轮周围流场的流动情况、表面压力系数、气动阻力系数和升力系数等数据的详细分析，得到了车轮旋转会对轮边流场和整车流场产生极大的影响，整车气动阻力和气动升力下降，气动性能得到改善.

Abstract:

A full scaled vehicle was applied to a research of the local and global flow characteristics. Two different conditions including stationary and rotation were employed in computational simulation by steady Reynolds Averaged Navier Stokes (RANS) calculation. Furthermore, a detailed analysis on flow, surface pressure coefficient, drag coefficient and lift coefficient affected by rotating wheel figures out that rotating wheel has a great influence on the flow around wheel and the vehicle. Pressure difference, drag coefficient and lift coefficient are decreased by rotation, which improves aerodynamic performance.