Simulation And Analysis Of Wind Environment Of Traditional Large Houses In Northeast Hunan

There are many big houses in the northeast of Hunan province,which form a natural ventilation system with regional characteristics through special spatial combination and modeling layout.In this paper,based on the hunan traditional residence in big house in the northeast of the field investigation and literature,with the most representative 12 big house residence as the research object,with its natural ventilation as the research key,analyzes the characteristics and genetic analy sis of the Ming and qing dynasties house residence,and extract the big house,a prototype of space with the CFD technology to the space characteristics and the law of natural ventilation for simulation analysis.The paper is divided into five parts.The first part introduces the research background,research object,research status at home and abroad,research purpose and significance,research content,research methods and so on.The second part is to summarize the basic situation of traditional big house dwellings in northeast Hunan province.It includes geographical location,climate,characteristics of big house dwellings,importance of natural ventilation of dwellings,influencing factors of natural ventilation of big house dwellings,and other measures to improve wind environment.The third part studies the plane type,section layout,slot door type and patio type of traditional big house dwellings.After analyzing the basic scale,the simulation prototype of big house dwellings is extracted,which is the basis of the next simulation study.The fourth part is the measured study on the wind environment of typical large house residential houses.The study shows that CFD software has high accuracy in wind environment research.The fifth part is to simulate the wind environment of different types of plane,section,slot door,patio setting reference object and research object of the big house.Finally,it also simulates whether the front of the big house is open with ventilated flower window and whether the gable wall of the ancestral hall is open,so as to study the influence of spatial layout and modeling factors on the wind environment.The study reached the following conclusions:First,the large house dwellings often take the hall wing type as the basic unit,and then develop horizontally and horizontally,and evolve into a large building complex with multiple entrances and multiple roads.There are three main types of big house plane in northeast Hunan:string hall type,adjacent type and from house type.The simulation study of wind environment shows that the indoor ventilation environment of large house is mainly composed of ventilation ventilation and patio ventilation,and the stronger the ventilation is,the better the indoor ventilation environment is.On the whole,the indoor wind environment of cuo house is better than that of contiguous house than that of series house because of its many and complex inner courtyard laneways.Two,the central axis of the house is generally composed of the entrance hall,hall,hall,hall,hall.The stepped design of the section is related to the topography,"over-whiteness",and the expression of ethical order,but the stepped layout is not conducive ’to the natural ventilation of the interior,because the stepped floor treatment blocks the transmission of natural wind inside the house.Three,the big house slot door has three forms of cornice corridor,eight-character wall and eight-character wall recessed.In addition to the decorative function,the setting of the slot door also greatly strengthens the wind speed of the indoor ventilation of the building,making the lower hall and the central hall have better ventilation effect.Part of large house dwellings build a hall between the front and rear halls,which divides the courtyard into two parts,so as to ensure lighting and air exchange to the outside world,and shade from the sun and rain.However,the hall itself does not promote the indoor wind speed of the building,but blocks the air outlet of the building patio,which has a negative impact on the indoor wind environment.5.The carved breathable Windows on the front of the big house not only enrich the facade of the big house,but also strengthen the indoor wind environment of the big house.The doors and Windows at both ends of the gable of the big house ancestral hall also strengthen the indoor natural ventilation.