为准确评价烟草仓库失火烟气危害，在借鉴能见度、热辐射、N －GAS 和 FED 模型的基础上，提出综合考虑热辐射、烟气毒性和能见度的烟气危害评价模型 TVH（Toxicity，Visibility，Heat）。采用 PyroSim 软件模拟的方法，以某失火烟草仓库为原型，构建接近于真实的虚拟火灾现场。通过模拟烟气运动规律及烟气危害评价因子随时间变化曲线，分析得出位置不同，烟气危害的效果也不同。定量计算三个模型烟气危害指数，分析得出热辐射是造成人员伤亡的重要原因，TVH 模型比 N －GAS 和 FED 模型多考虑了热辐射和能见度的影响，更全面评价烟草火灾危害后果，最后提出 TVH 模型的应用前景。%In order to evaluate the fire hazard of flue gas in tobacco warehouse,based on models of visibility, heat,FED and N-GAS,TVH (Toxicity,Visibility,Heat)model is proposed.Using the method of PyroSim soft-ware simulation,taking a fire tobacco warehouse as the prototype,the virtual fire scene close to the real is built. Through simulating the movement law of the smoke and the variation curve that hazard evaluation factors of flue gas change with time,it is concluded that the effect of flue gas of different position is different.According to the flue gas hazard index the three models quantitative calculate,the conclusion heat is an important cause of casualties is analyzed.Considered the effect of heat and visibility,the evaluation hazard of TVH model is more comprehensive than that of N-GAS and FED model.Finally,the application of TVH model is put forward.
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