Study On Outdoor Wind Environment Optimization Of High-Rise Residential Areas Around Hohhot City

In recent years,with the continuous growth of population,the urbanization process of Hohhot is in a rapid development stage.The high-intensity and expansive development of land leads to the increasing number of high-rise residential areas.However,the design of outdoor wind environment is still relatively backward,especially the high-rise residential areas around the city.The problem of outdoor wind environment is more prominent than that of high-rise residential areas inside the city because of the lack of urban buildings.High-rise buildings increase wind speed in local areas of the community,which has a negative impact on residents’ outdoor activities.The premise of improving people’s life quality is a comfortable living environment.The basic requirement of urban residents for healthy life is a good indoor and outdoor air environment.The research object of this paper is the outdoor wind environment of high-rise residential areas around Hohhot city.This paper summarizes the theories about outdoor wind environment of high-rise residential areas around the city,including architectural wind environment,wind flow characteristics,CFD method and selection,which provides basis and guidance for the research of this topic.Based on the three main research fields related to residential wind environment: pedestrian wind environment,natural ventilation and pollutant diffusion,this paper compares domestic and foreign wind environment evaluation standards with previous research results,and selects and summarizes the outdoor wind environment evaluation standard values suitable for Hohhot high-rise residential areas,which lays a theoretical foundation for later field research and data analysis.According to the climate situation of Hohhot,the data of dominant wind speed and direction in each season are collected and screened.The outdoor wind environment of high-rise residential areas in and around Hohhot is investigated on the spot,wind environment data is collected,and the connection between meteorological data and measured data is studied to obtain the wind environment characteristics of high-rise residential areas.CFD wind environment simulation software is used to establish the ideal model of high-rise residential areas,and the influencing factors of macro,mesoscopic and micro characteristics of residential areas are simulated and analyzed respectively through control variables,so as to conclude the change rules of wind environment of high-rise residential areas around Hohhot city.A high-rise residential area located near Hohhot was selected as the object of outdoor wind environment optimization,and the four seasons leading wind environment conditions of the original residential area were simulated.Wind environment optimization strategies and adaptive optimization ideas were proposed according to the wind environment problems in the planning stage,scheme stage and preliminary stage respectively.This paper studied the outdoor wind environment of high-rise residential areas around Hohhot city,made up for the deficiency in the study of residential wind environment in Hohhot area,expanded the research scope to the periphery of the city,screened the appropriate wind environment evaluation index values of Hohhot residential areas,explored the wind environment characteristics inside and around Hohhot city,and summarized the wind environment change rules of high-rise residential areas.A complete set of wind environment optimization strategies for high-rise residential areas around Hohhot city is proposed,which enriches the theoretical research on residential wind environment,contributes to creating a more comfortable living environment,and provides reference and guidance for the planning and design of high-rise residential areas.