Aerodynamic performance of a road vehicle has significant impact on energy efficiency, especially at high speed. Finding all possible ways to reduce aerodynamic drag has paramount importance on the development process of the vehicle. The study is conducted with an intention to contribute for driving range extension of an electric vehicle by the improvement of aerodynamic performance. In this study the effect of ducting on the aerodynamic performance of electric vehicle is given due attention as a new approach to improve aerodynamic energy efficiency. Intensive numerical calculation is made using simple body. Three-dimensional, incompressible, and steady governing equations were solved by PHOENICS version 2018 (a commercial CFD software) with extended turbulent model proposed by Chen-Kim (1987). In this numerical study, ducted and slightly modified Ahmed model is used to study aerodynamic characteristics of ducted model and how ducting would contribute to the energy consumption reduction effort from aerodynamic resistance. A significant decrease in a total drag with duct size is investigated. About 14.3 % drag reduction is observed on one of the test models used as an illustration. Furthermore, detail flow analysis made and numerical outputs included in this article are believed to have a paramount importance in the area.

公路车辆的空气动力学性能对能源效率有重要影响，尤其是在高速行驶时。寻找减少空气阻力的所有可能方法对车辆的开发过程至关重要。进行该研究的目的是通过改善空气动力学性能来为电动车辆的续驶里程扩展做出贡献。在这项研究中，风道对电动汽车的空气动力性能的影响作为一种提高空气动力能量效率的新方法受到了应有的重视。使用简单的主体进行密集的数值计算。由Chen-Kim（1987）提出的扩展湍流模型通过PHOENICS 2018版（商业CFD软件）求解了三维，不可压缩和稳定的控制方程。在这项数值研究中 风管和经过稍微修改的艾哈迈德模型用于研究风管模型的空气动力特性，以及风管如何通过空气动力阻力来减少能耗。研究了总阻力随风管尺寸的显着降低。在用作说明的一种测试模型上，观察到了约14.3％的减阻。此外，本文中进行的详细流量分析和数值输出被认为在该领域具有至关重要的意义。