Research On Interface Forms Optimization Of Professional Football Stadium In Cold Regions Based On The Audience Area Wind Environment Simulation

The country's promulgation about the construction of sports country,reform of football development,implementation of Healthy China,etc.and the Asian Cup in 2023 make China's sports industry is developing towards a bigger,livelier and better direction,which also indicates that the competitive sports industry represented by football industry is approching the goal of better,faster,higher and stronger.Especially,the healthy China strategy has refreshed the traditional concept of health and redefined the relationship between national health and sports.Thereupon,the viewing comfort of the competitive arena has gradually received more and more attention.In cold regions in China,the football match and the viewing environment are greatly affected by the natural conditions.Especially in the cold season,the open-air football field can not meet the needs of the league and the team's bad situation in "away" games needs to be reversed.The use of professional football stadiums is slightly better than that of track and field stadiums from the perspectives of activity cycle,frequency of use,number of participants,and economic benefits,etc..So,reducing environmental pressureis critical to optimize the audience area environment.More importantly,when it is in a low temperature environment for a long time,people are more sensitive to the change of wind speed.Excessive wind may even threaten the people's safety.Therefore,it is urgent to carry out refined research on theprofessional football stadium audience area wind environment in the cold season.The objective in this paper is the audience area wind environment of the professional football stadium.In order to obtain the wind environment evaluation system applicable to this paper,Tianjin was selected as the representative city in cold regions of China to conduct research in some areas at the October and November in 2018.Through the data collection,the wind speed range of outdoor related activities was defined and the wind environment comfort reference standard in cold regions of China was obtained under low temperature conditions.This paper took the harbin Convention and Exhibition Center stadium as the actual measurement site,compared the simulation experiment results with the experimental results,verified the credibility of the CFD simulation experimental platform.And then the Fluent 17.0 was selected as the experimental platform,the ICEM CFD 17.0 was the pre-processor,the Tecplot 360 EX 2014 R1 was the post-processor.Based on the analyze of the space capacity of the established professional football stadiums,the experimental model of the professional football stadium in this paper is around 30 000 seats.Finally,the point affecting the wind environment of the audience area was selected as the permeability of the interface of the professional football stadium andthe variable conditions in the interface permeability in the professional football stadiumare 2%,4%,6%;the variable conditions in the permeability of the side enclosure interface are 100%,50%,20% and the variable conditions the permeability between the canopy and the seat are 85%,50%,0.Then 27 physical models were arranged in the simulation.The urban gradient wind and turbulence model files were imported through the udf programto bring the simulation state closer to the actual situation.Finally,by comparing the wind speed ratio map,wind speed contour map and wind speed vector diagram of multiple sets of experiments and referring to the average wind speed,maximum wind speed,full field wind speed difference and human body tolerance coefficient evaluation model,this paper summarized the effects of single variable form and combined variable forms on the audience area wind environment from the audience viewing wind comfort.Those suggestions will provide a new design strategy for the optimization of the interface shape of professional football stadium in cold regions of China.