门窗不同开启状态下自然通风流量系数研究

he use of flow coefficient is a generally accepted method to calculate the ventilation rate in the study of natural ventilation.In this paper,Airpak software is used to reseach the full differential pressure under the different open degree of the combination of the most common side hung door and sliding window,to calculate the change of the flow coefficient with change of the door and window. It is displayed in the simulation that the effect of the open degree of sliding window is bigger than that of side hung door.Finally,based on the ventilation rate formula in wind pressure ventilation,a new formula of flow coefficient is fit.