基于人员疏散的防护工程消防喷淋系统设计探讨

Discussion on Fire Sprinkler System Design of Protective Engineering based on Personnel Evacuation

在基于大涡模拟算法的FDS平台上,采用以网格为计算方法的Herbing社会力模型对防护工程火灾烟气特性及人员疏散进行了计算机仿真模拟。结果表明:防护工程发生火灾时,烟气会沿着走廊蔓延,烟气的毒性作用以及对能见度的降低,会阻碍人员疏散,加大火灾烟气威胁。消防喷淋系统对人员疏散极为重要,减缓了烟气前锋扩散速度,降低了人员疏散过程中受到的烟气毒性作用。随着相邻防护门间距加大,人员疏散危险性加大,设计时要综合多方面因素确定防护门距离。

On the FDS platform based on the large eddy simulation algorithm, the Herbing social force model based on the grid was used to simulate the flue gas characteristics and evacuation of the protective engineering fire. The results show that, when a fire occurs in a protective engineering, the flue gas will spread along the corridor, the toxic effect of flue gas and the decrease of visibility will prevent the evacuation and increase the fire smoke threat. The fire sprinkler system is extremely important for evacuation, which slows down the flue gas forward speed and reduces the toxic effects of flue gas during evacuation. With the distance between the adjacent protective doors increased, the risk of personnel evacuation increased, the design should consider the various factors to determine the distance between the protection doors.