This paper deals with a computational fluid dynamics (CFD) and experimental drag analysis on an isolated rotating wheel subsystem (including its accessories: tire, suspension, A-arms, and fender) of a motor tricycle vehicle with two wheels in front. The main goal of the present work is to study the effect of the fender on the wheel subsystem drag and its optimization. The Star CCM+ commercial code was used for the numerical simulations. Different flow conditions were simulated and some results were validated by comparison to wind tunnel experimental results. To perform drag optimization, several aerodynamic fender shapes were designed and simulated as part of the subsystem. A drastic drag reduction up to 30.6% compared to the original wheel subsystem was achieved through numerical simulations.
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机译：本文研究了在前轮为两个车轮的三轮车的隔离式旋转轮子系统（包括其附件：轮胎，悬架，A臂和挡泥板）上的计算流体力学（CFD）和实验阻力分析。当前工作的主要目的是研究挡泥板对车轮子系统阻力的影响及其优化。 Star CCM +商业代码用于数值模拟。模拟了不同的流动条件，并与风洞实验结果进行了比较，验证了一些结果。为了进行阻力优化，设计了几种气动翼子板形状并将其模拟为子系统的一部分。通过数值模拟，与原始的车轮子系统相比，阻力大幅降低了30.6％。
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