Study On Outdoor Wind Environment Of Kindergartens In Lanzhou Based On CFD

In the context of the country ' s active development of early childhood education,the early childhood education model has changed from a traditional learning type to a modern participatory type.The design concepts and methods of kindergarten buildings have begun to become the focus of national attention,including creating a safe and healthy outdoor living and growing environment for children and outdoor communication spaces of different scales and levels.However,on the one hand,the market-oriented high-rise and high-density urban development model has caused a general decrease in urban wind speed,making the outdoor environment of kindergarten buildings with lower economic benefits not guaranteed;on the other hand,the industry in Lanzhou is based on heavy industry.Mainly,there is a certain degree of air pollution and it is located in the north.The coal-fired heating in winter and the sand and dust weather from the Hexi area in the late winter and early spring have aggravated the degree of air pollution in the area and directly affected the comfort of children ' s outdoor activities.As well as reducing the duration of outdoor activities,the contradiction between the friendly and healthy development of the outdoor environment of the kindergarten buildings in Lanzhou is highlighted.Therefore,this study takes the optimization design of the outdoor wind environment of the kindergarten building in this area as the research object,and uses CFD technology to simulate and analyze the impact on the outdoor wind environment from the aspects of building layout,size,orientation,and spacing.The research is mainly divided into the following three parts:1)Firstly,analyze the wind environment characteristics and outdoor wind environment influencing factors during the main activity period of children in Lanzhou area,focusing on the building layout,the building size including the plane size and height,the building orientation and the distance from the surrounding buildings,etc.to conduct actual surveys and surveys,and select The actual case conducts actual measurement and simulation of outdoor wind environment,and then analyzes the accuracy of simulated and measured values to verify the scientificity and feasibility of CFD wind environment simulation,laying a foundation for the simulation analysis of outdoor wind environment of kindergartens in Lanzhou;2)Secondly,based on the wind environment data of children's main activity time in Lanzhou from 9 am to 5 pm,the outdoor wind environment of the kindergarten of different layouts,sizes,orientations and spacing is simulated,and the evaluation is carried out according to the relevant wind environment evaluation standards.It can be concluded that the outdoor wind environment of the kindergarten in Lanzhou area has low wind speed,the quiet wind area of the south side of the activity site is larger,the windward surface has more eddy currents and different degrees of wind environmental effects have appeared,which are not conducive to pollutants.Purification affects the physical and mental health of young children;3)Finally,the corresponding wind environment optimization design strategies are proposed from five aspects of the kindergarten building layout,size,orientation,spacing and typical wind environment effects,and actual cases are selected to verify the effectiveness.The simulation results show that it is helpful to improve the outdoor environment of the kindergarten.The wind environment has a better effect.This research can not only clarify the complexity of outdoor wind environment theoretically,but also guide the construction of kindergartens,and finally realize the development goal of safety and health of outdoor wind environment of kindergartens in Lanzhou area.