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讨论了纵向通风隧道火灾和相关烟气形成现象。利用计算机流体动力模型模拟烟气流动,获得可以与试验数据进行比较的预测结果。在Richardson数字基础上,采用了不同参考稳定值,结果发现,直接利用火灾热释放速率所获得的温度值会产生最有用的结果。试验结果与数值预测结果的比较发现,两者吻合较好。笔者验证了利用容积测定火源模拟火灾的情况。结果的准确性很大程度上取决于对墙和屋顶的热传递。
Discussed the vertical ventilation tunnel fire and related flue gas formation. Using computer fluid dynamics model to simulate the flue gas flow, we can get the prediction results that can be compared with the experimental data. Based on the Richardson number, different reference stability values were used and found that the most useful results were obtained by directly using the temperature values obtained from the rate of fire heat release. The comparison between the test results and the numerical prediction results shows that the two agree well with each other. I verified the use of volume determination of fire simulate the situation. The accuracy of the result depends very much on the heat transfer to the wall and roof.