## 6 Conclusions  
Based on CFD technology, this study takes the Beijing 2022 Winter Olympic Stadium National Sliding Center as an example, carries out wind field simulation research at the building scale, applies the simulation results, and defines the related parameters of resistance reduction to quantify the influence of the wind field on micro-athletes' performance, so that people can form a comprehensive understanding of the indoor and outdoor wind field characteristics of large stadiums and their influence on athletes' performance. The main conclusions of this paper are as follows:  
(1) The decisive factor affecting whether the outdoor wind field of a large single building can be evenly distributed is the building shape, and the climatic conditions are secondary. We obtained average global wind speed dispersion values of Area I, Area II, Area III, and Area IV of 1.9543, 0.2454, 1.5718, and 0.2721, respectively. In addition, we obtained average global wind speed dispersion values of 1.0037, 1.0502, and 0.9788 when the wind directions are WNW, NW, and NWN, respectively. This underscores the critical importance of aerodynamic design in large sports venues to mitigate turbulence and extreme wind zones. (2) The design of the NSC is reasonable, allowing it to effectively reduce the sliding wind resistance of athletes even under complex climatic conditions. We optimized the sliding routes of athletes based on the quantitative impact of wind resistance on athletes under different climatic conditions. When the climatic conditions during the competition are more complex, or the wind level around the venue is higher, the optimized sliding routes can reduce wind resistance more effectively, thereby enabling athletes to achieve better competition results. With a gradual increase in wind level (3.125, 3.5, 4.5, 5.5, 6.5, 7.5, 8.229), the optimized sliding route can reduce the air resistance by 0.2607 N, 0.3415 N,0.4600 N, 0.6469 N, 0.9283 N, 1.1741 N, and 1.4535 N, which can improve the athletes' competition results by 0.02 s, 0.03 s, 0.04 s, 0.06 s, 0.09 s, 0.11 s, and 0.14 s, respectively. This study not only innovatively provides methodological support for exploring the impact mechanism of athletes' performance from the building-scale wind environmental perspective, but also has great significance for mastering the characteristics of outdoor wind fields, indoor personnel safety, building operation, and maintenance management of large stadiums. The research method in this paper has strong reusability, which can be used not only to improve the performance of skeleton athletes, but also to improve the performance of bobseleigh and luge athletes. This method has a low time cost and saves resources, and can shorten the training cycle of athletes and improve the personal utilization rate of sports venues. However, there are still some limitations to this study. For example, four typical areas that play a decisive role in athletes' competition results are used, instead of the whole stadium. If we can overcome the contradiction that the simulation scale should not only reflect the geometric shape of the National Sliding Center well, but also monitor the small-scale climate characteristics of CFD, the real simulation of the whole stadium will significantly improve the accuracy of the analysis of athletes' resistance reduction, and the optimized sliding route will be more credible. For another example, in view of the outdoor wind field characteristics of buildings, this study only focuses on the interaction characteristics between the National Sliding Center and the wind. If we can consider the buildings around the National Sliding Center at the same time, and analyze the interaction between the indoor and outdoor wind and heat fields of the National Sliding Center from the point of view of the thermal comfort of indoor athletes, this will constitute the basis for further research on this topic.