Closeness Design Of Side Enclosure Of Football Stadium Based On CFD Simulation

Sports industry has developed rapidly in recent decades.Among them,the football project has achieved rapid development during the "Twelfth Five-Year Plan" period.With the introduction of the "Overall Plan for China’s Football Reform" and other documents,the attention of football has increased sharply.However,China still faces a serious shortage of professional football stadiums and lack of construction experience.Since 2000,stadiums with closed sides have replaced the status of open stadiums gradually,and the more complete skin covering design has also deteriorated the infield wind environment quality.After2010,fully enclosed stadiums appeared in China.Due to the application of parametric design and BIM in the construction,controllable ventilation units on the side interface of stadium came into being.By adjusting the opening and closing of the air pillow,vents are formed to introduce the external environment wind into the space above the seats in the infield.However,this approach lacks the support of theoretical research and related data.This research will focus on the impact of the permeability of the side interface of football stadiums on the infield wind environment.First,this research summarizes several factors that can affect the internal wind environment of professional football stadiums,and locks three variables,they are the cross-sectional shape of side interface,the permeability of space under stadium stands and the permeability of stadium stands.At the same time,porous media was introduced to these experiments,and a set of experimental methods was established for this study.Through the controlled variable experiment,we found the internal connection between the permeability of the side interface and the infield wind environment,and then reached the conclusion:The near-ground outer surface with an opening ratio of not more than 20% and the upper outer surface with an opening ratio of not more than 10% can improve the quality of the internal wind environment.Under the condition of a semi-open space under seats,increasing the seat opening rate blindly is likely to be difficult to improve the ventilation efficiency of the seat.On the contrary,appropriately reducing the porosity will maintain air pressure difference between the upper and lower sides of stands,which helps to improve the ventilation performance of stands.Based on the results obtained,this article also puts forward suggestions on the design of football stadiums,in order to provide part of the basis for the construction or renovation of football stadiums that require wind environment control.