發(fā)布時(shí)間：2018-10-17 18:18

【摘要】：為了研究熱障效應(yīng)對(duì)有頂商業(yè)步行街自然排煙的影響,采用理論分析與數(shù)值模擬相結(jié)合的方法,對(duì)不同高度及不同環(huán)境溫度條件下有頂商業(yè)步行街自然排煙時(shí)頂棚附近的溫度、能見(jiàn)度以及排煙效率進(jìn)行了分析。結(jié)果表明:頂棚附近環(huán)境溫度越高,自然排煙效果越差,自然排煙效率隨頂棚熱空氣溫度的升高呈現(xiàn)線性降低趨勢(shì);步行街高度越高,豎直方向的溫度差越小,到達(dá)頂棚的煙氣流速越小,排煙效率越低;當(dāng)頂棚附近環(huán)境溫度為45℃時(shí),有頂商業(yè)步行街高度不宜超過(guò)35 m。
[Abstract]:In order to study the influence of thermal barrier effect on the natural smoke exhaust of commercial pedestrian street with roof, the temperature near the roof of commercial pedestrian street with roof under different height and different ambient temperature was studied by combining theoretical analysis and numerical simulation. Visibility and smoke efficiency were analyzed. The results show that the higher the ambient temperature near the roof, the worse the effect of natural smoke exhaust, and the lower the vertical temperature difference is, the lower the natural smoke exhaust efficiency is with the increase of the air temperature in the roof, and the higher the height of pedestrian street is, the smaller the vertical temperature difference is. When the ambient temperature near the ceiling is 45 鈩，

本文編號(hào)：2277546