On the aerodynamic flow around a cyclist model at the hoods position
On the aerodynamic flow around a cyclist model at the hoods position
复制标题
关于骑车人模型在引擎盖位置周围的空气动力学流动
DOI：
10.1007/s12650-019-00604-2
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发表时间：
2020
影响因子：
1.7
通讯作者：
San
中科院分区：
文献类型：
--
作者：
J. Miau;Shang;Z. Tsai;Mai Van Phung;San
摘要：对 1/5 比例自行车模型周围的空气动力流动进行了实验和数值研究。首先，在雷诺数为 1 的低速风洞中对模型进行了阻力测量。同时，采用大涡模拟方法在三个雷诺数下进行数值计算，得到阻力系数进行比较。其次，在水道和风洞中进行了流动可视化，以检查模型表面上的三维流动分离模式，这也可以从数值结果中实现。最后，基于风洞热线测量的尾流调查表明，在近尾流区域，流动的特点是形成多个流向涡。数值结果进一步表明这些涡流是由模型表面发生的分离流演化而来。
AbstractAerodynamic flow around an 1/5 scale cyclist model was studied experimentally and numerically. First, measurements of drag force were performed for the model in a low-speed wind tunnel at Reynolds numbers fromto. Meanwhile, numerical computation using a large eddy simulation method was performed at three Reynolds numbers of,andto obtain the drag coefficients for comparison. Second, flow visualization was made in a water channel and the wind tunnel mentioned to examine the three-dimensional flow separation pattern on the model surface, which could also be realized from the numerical results. Finally, a wake flow survey based on the hot-wire measurements in the wind tunnel showed that in the near-wake region, the flow was featured with the formation of multiple streamwise vortices. The numerical results further indicated that these vortices were evolved from the separated flows occurred on the model surface.Graphic Abstract