以某发生过火灾的大型商店建筑为研究对象,对该建筑火灾的烟气、温度及火焰情况进行FDS模拟,并与监控拍摄的火灾画面对比分析.研究得出:在火灾初期的12 min之内,成灾空间小,模拟火灾温度、烟气与火灾实景画面具有较高的一致性;宏观考虑一定时间内建筑火灾烟气的整体蔓延趋势时,大涡模拟可以较为真实地反映火灾的瞬态湍流特性,但其所采用的体积热源法对火势蔓延的模拟具有一定的局限性,影响对烟气流动的模拟.%Taken the fire of a large-scale commercial building as the research object, fire smoke, temperature and flame situation of the building has been simulated by FDS. By comparing the monitor screen shot of the fire with the simulation results, studies have shown that the disaster space is small early in the fire within 12 minutest the simulation of fire temperature and smoke has the high consistency with real fire images. Consider the wholc: smokc spread tendency of building in certain time macroscopically, the large eddy simulation can truly reflect the fire transient turbulence properties, but the volumetric heat source method has certain limitation in the simulation of fire spread, and affects the smoke flow.
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