喷淋水幕抑制化工聚集区火灾效果研究

Study on the effect of suppressing fires of spraying water curtain on chemical agglomerations

为了揭示不同工况下喷淋水幕对化工聚集区火灾抑制效果影响规律,建立了FDS数值模型,通过改变单一变量分别模拟水幕开合状态、不同水幕排数、不同水幕喷头高度下火灾发展过程,分析不同工况条件下火源温度变化规律和烟气蔓延规律。结果表明:喷淋水幕开启后,位于储罐上方及水幕帘后的测点温度峰值同比下降19%及36%,可有效抑制高温烟气层蔓延;双排水幕帘相比单排水幕帘在抑制火源温度及烟气蔓延更具成效;初始喷头高度5.8 m时,相比其他高度在降低温度、加速烟气沉降方面更具优势。

In order to reveal the influence law of emergency sprinkler water curtain on fire suppression effect in chemical gathering area under different working conditions,this paper establishes an FDS numerical model,simulates the fire development process under the opening and closing state of water curtain,the number of water curtain rows and the height of water curtain nozzle respectively by changing a single variable,and analyzes the change law of fire source temperature and the law of smoke spread under different working conditions.The results are as follows:after the sprinkler water curtain is opened,The peak temperature at the measuring point above the storage tank and behind the water curtain decreased by 19%and 36%,which can effectively inhibit the spread of high-temperature smoke layer;The double row water curtain is more effective than the single row water curtain in restraining fire source temperature and smoke spread;When the initial nozzle height is 5.8 m,compared with other heights,it has more advantages in reducing temperature and accelerating smoke sedimentation.