中文摘要：

为探明隧道内水雾对柴油池火的火焰强化作用机制,基于Froude准则,搭建比例为1∶10的隧道水雾灭火试验平台。用模型试验方法,定量分析喷嘴压力与预燃时间等因素对水雾的火焰强化效果的影响。试验结果表明,火焰强化现象产生的主要原因是水雾和燃料的扬沸,只有当喷嘴压力超过某一临界值时才会出现火焰强化现象;强化后的火焰宽度及面积较无强化火焰明显增大,火焰高度略有降低;水雾对火焰的强化作用可以分为瞬间弱度、间断中度和连续强度3种程度,随着预燃时间的增加,火焰强化程度不断升高,火灾危险性逐渐变大。

英文摘要：

To discuss flame strengthening effect caused by water-mist in diesel pool fire,a 1 ∶ 10 watermist fire fighting experiment platform was established based on Froude rule. By means of small scale model effects of,quantitatively factors,like nozzle pressure and pre-combustion time,on the flame strengthening caused by water-mist were studied. The results show that the main reason for flame strengthening phenomenon is boiling of both the water-mist and the fuel,only when nozzle pressure surpasses a critical value,there will arise the flame strengthening phenomenon,that the flame width and area increase obviously after strengthening effect,while the flame height has a slight decrease,and that the water-mist has three different strengthening effects on flame,which are divided into fast-weak strengthening,discontinuousmoderate strengthening and continuous-intense strengthening, and increasing pre-combustion time promotes,the flame strengthening degree gradually,and makes the fire hazard greater.