着火车辆高度对公路隧道火灾烟气蔓延特性影响分析

随着我国经济的发展,公路隧道的数量不断增多。由于隧道环境相对封闭,一旦发生火灾,毒气、热量积聚,人员疏散困难。因此,火灾发生后排烟系统成为控制烟气蔓延,排出热量的最有效方式。目前对隧道火灾烟气蔓延特性的研究不考虑隧道内车辆的影响,但实际火灾中,隧道内车辆会对流场产生影响,从而影响烟气蔓延。该文基于全尺寸隧道火灾试验,重点研究隧道实际运营状态下隧道内车辆高度对烟气蔓延特性的影响。

Analysis on Influence of Fired Vehicle Height on Fire Smoke Overspreading Characteristic of Highway Tunnel

With the development of economy in China,the number of highway tunnel continuously increases.It is hard to evacuate the people once the fire happens because of the relatively closed tunnel to accumulate the gas and heat.Therefore,the smoke exhausting system becomes the most efficient mode to control the smoke overspreading and to exhaust the heat after a fire happens.The present study on the fire smoke overspreading characteristic of the tunnel does not consider the influence of vehicle within the tunnel.But the vehicle within the tunnel will cause the influence on the flow field in the practical fires so as to influence the smoke overspreading.Based on the full-size tunnel fire test,the article focuses study on the influence of vehicle height on the smoke overspreading characteristic within the tunnel under the practical operation of tunnel.