Abstract
There have been limited research increasing knowledge of flow around an alpine skier, and the effect of different arm positions. In this study, a wind tunnel experiment were conducted testing five different arm positions on a model of an alpine skier. Drag measurements were done, and the flow separation point was studied by doing flow visualizations with the use of oil and pigments. In addition, wake measurements were done with the use of a Cobra Probe. These results were compared to CFD simulations to serve as validation for a CFD model. The low tuck position was the best with regards to drag area, while the arms down along the legs position was the worst with 53\% higher drag area than the low tuck position. The difference in drag area is due to smaller frontal area for the low tuck position, later separation point causing less pressure drop, and the forearms penetrating the air and bending the flow around the upper arms. This makes the low tuck position the most aerodynamic favorable position in this study. The experimental and simulation results coincided well offering further validation to the CFD model.