Simulation Study On Wind Environment Of Courtyard Building

Nowadays,from the development of history to the present in China,courtyard style architecture is widespread due to the natural,historical,humanistic,courtyard and human needs.And because of the courtyard lighting,ventilation and social places and other functions,the current most courtyard buildings exist in teaching buildings and office buildings.Using courtyard to improve the ventilation environment of courtyard building needs to be integrated into the architectural design,but the current stage is not perfect,which leads to the courtyard building,but it is difficult to maximize the comfort of indoor wind environment.In this context,through the study of the shape and opening changes of enclosed buildings,to explore the strategies to improve and optimize the courtyard style building wind environment has become one of the important contents in the field of green building design.Based on the investigation of courtyard building types,this paper analyzes the common types and typical problems of courtyard building,and discusses the principles and means of natural ventilation of courtyard building;The evaluation index of natural ventilation for courtyard buildings is established based on the wind speed and the proportion of comfortable rooms.The logical structure of "basic experimental model reasonable selection of variables control variable method" and the technical route of "strategy classification experimental simulation data analysis" are defined.Under the condition of basic experimental model,reasonable boundary conditions and preconditions,the simulation experiments of six variables are carried out one by one under the premise of control variable method,and then the comparison results of variable data results and evaluation indexes are obtained,and then the optimal fitting model and strategy results of each variable are determined;Finally,from the two aspects of the courtyard volume and the change of the side interface opening,according to the evaluation index of the wind speed and the proportion of comfortable rooms,the paper puts forward the design strategy of the courtyard building wind environment optimization.The conclusions are as follows:(1)The design strategy of courtyard volume change.The results show that the best orientation of the overall study is to move 15 °clockwise,and the best wind environment for the first floor is to move 6m along the b-axis;the best wind environment for the second floor is to move 6m along the b-axis;the best wind environment for the third floor is to move 52 m in length(b-axis is the length of the courtyard,a-axis is the width of the courtyard);the best wind environment for the fourth floor is the courtyard The length of the courtyard is 52m(b axis is the length of the courtyard,a axis is the width of the courtyard);the best way to improve the overall wind environment is to offset 6m along the b axis.(2)The design strategy of the change of the courtyard side interface opening.The results show that the best wind environment for the first floor is D1 full opening;the best wind environment for the second floor is D2 full opening;the best wind environment for the third floor is d opening height of 7.2m;the best wind environment for the fourth floor is C opening height of 10.8m;the best wind environment for the whole floor is A4 full opening.(3)Among the two design strategies,the most obvious one is the change of the opening of the courtyard side interface.Therefore,the designer can consider the existing situation in the design stage and draw the conclusion of how to do the wind environment design.