上、下悬窗开启角度对排烟效果影响的研究

Impact of the degree of top-hung windows and bottom-hung windows on smoke exhaust

自然排烟窗有多种开启方式,开启方式的不同影响烟气的流动,进而影响排烟效率。通过数值模拟方法,研究了自然排烟窗的开启方式对排烟效果的影响。主要研究了上悬窗和下悬窗在排烟上的表现。通过对上悬窗开口角度的研究,发现了上悬窗主要排烟区域为两侧,且排烟效率跟开启角度正弦值有关,并在此基础上提出了一种提高建筑中上悬窗排烟效率的方法。而下悬窗的模拟结果则表明,开启大于23°时,排烟效果基本不受影响。

There are many ways of opening the natural smoke exhaust window.The different opening methods affect the flow of smoke,and influence the efficiency of smoke exhaust.This paper studies the impact of the type of natural smoke exhaust window(the top-hung and bottom-hung windows)on exhaust efficiency by numerical simulation.By studying the opening angle of the top-hung window,it is found that the main smoke exhaust area of the top-hung window is on both sides,and the exhaust efficiency is related to the sinusoidal value of the opening angle.Based on that,a method for improving the smoke exhaust efficiency of the top-hung windows is proposed.The simulation results of the bottom-hung window show that the effect of exhaust smoke is basically unaffected when the opening angle is higher than 23°.