In this paper we examined the aerodynamic drag and the resulting decrease of power output associated with the drafting positions used by Kenenisa Bekele at the 2019 Berlin marathon. Examination of videos of the race revealed three different positions adopted by Bekele directly behind a frontline of three runners. These drafting positions were numerically studied using CFD simulations performed with the RANS equations and the SST k-ω model. Depending on his position behind the pacers, our analyses indicated that Bekele’s drafting strategy resulted in reductions of 38.5–57.3% of the drag resistance and aerodynamic power. In terms of metabolic power, Bekele’s drafting positions yielded an estimated 1.91–2.84% reduction compared to the calculated metabolic power of 1427.89 W (or equivalent metabolic power relative to body mass of 25.50 W/kg) that Bekele would have developed if he had run alone at the same speed of 5.75 m.s⁻¹.

在本文中，我们研究了空气阻力以及与Kenenisa Bekele在2019年柏林马拉松比赛中使用的牵伸位置相关的功率输出减少。对比赛视频的检查揭示了Bekele在三个跑步者的前线之后所采用的三个不同位置。通过使用RANS方程和SSTk-ω模型进行CFD模拟，对这些牵伸位置进行了数值研究。根据他在起搏器后面的位置，我们的分析表明，Bekele的起草策略导致阻力阻力和空气动力降低了38.5-57.3％。就新陈代谢能力而言，与计算出的1427.89 W的新陈代谢能力（或相对于体重25的等效新陈代谢能力）相比，Bekele的起草位置估计减少了1.91–2.84％。^-1。