Study On The Indoor Natural Ventilation And Pressure Distribution Characteristics In Low Gable Building With Opening

Like as tent and portable dwellings,Low Gable Building with Opening has small size,and advantaged of folding quickly,low requestment to place,high recycling rateand so on,it has been widely used in military command center,medical security place,and disaster relief and other temporary residence.Because of having thin building envelope,indoor temperature is high in hot summer,in order to enhancing indoor natural ventilation,improving indoor comfort,and meeting the requirement of lighting,passage and so on,Low Gable Building with Opening decorate the doors and windows,the window panel,ventilation opening and other structural measures.At the same time,the wind pressure distribution changed significantly around the building,and the internal and external wind load work together to the building.At present,the influence of structural measures on the indoor natural ventilation and the surface wind pressure distribution characteristics is lack of systematic research at home and abroad,result in shorting of theoretical basis to determinate the structural measures.Therefore,it is necessary to study the wind-induced effect of light opening double slope low building with structural measures,so as to provide a theoretical basis for the design of similar building.Based on the basic principle of fluid dynamics and the basic theory of atmospheric boundary layer,this paper utilize the FLUENT software on the numerical simulation of the standard TTU model,and compared with the measured data to discuss and analyze the parameters including the numerical wind tunnel size,grid division,turbulence model,solution algorithm and discrete format,and so on,then set up a numerical wind tunnel to Low Gable Building with Opening.Taking the wind direction angle,roof slope angle,window panel,ventilation opening as parameters,the 81 numerical simulation of was carried out to obtain indoor and outdoor wind speed vectors and the wind pressure cofficience on each surface.On this basis,the influence of various parameters to natural ventilation and surface wind pressure distribution is analyzed,then obtained the roof slope angle,window baffle opening angle,and ventilation openings that are conducive to natural indoor ventilation,and pressure cofficience is advantaged for against the wind.The results show that the indoor natural ventilation and the internal pressure coefficient significantly affected by wind direction angle,roof slope angle,window baffle opening angle,and external pressure coefficient is only affected by the wind direction angle and roof slope angle,and the parameters that are conducive to natural indoor ventilation are: the roof slope angle is 34°,the window shutter opening angle is 90°,and the ventilation hole size is 700mm×1100mm.