论文部分内容阅读
在许多高大空间建筑中安装有自然排烟系统,而随着空间高度增加,火灾烟气温度降低,浮力减小。在某机场航站楼二楼办票大厅进行了全尺寸火灾试验,对大厅顶部的电动自然排烟窗的排烟有效性进行检验。试验中火源为甲醇池火,添加发烟剂作为示踪粒子。共进行了6组不同排烟口面积和火源功率的试验,通过测量火源附近大厅上部烟气温度分布和排烟口速度验证自然排烟的有效性。结果表明,自然排烟窗能有效排出烟气,控制烟气沉降,降低火灾危险性。
Natural smoke evacuation systems are installed in many high-rise buildings, and as space increases, the temperature of the fire flue gas decreases and buoyancy decreases. A full-size fire test was carried out at the check-in hall on the second floor of an airport terminal to test the effectiveness of smoke exhaust at the top of the hall for electric natural smoke exhaust windows. In the experiment, the fire source was a methanol pool fire, and a smoky agent was added as a tracer particle. A total of six different exhaust vent area and source power tests were conducted. The effectiveness of natural venting was verified by measuring the temperature distribution of the flue gas in the upper part of the lobby near the source of ignition and the velocity of the exhaust vent. The results show that the natural smoke exhaust window can effectively exhaust the flue gas, control the flue gas deposition and reduce the fire risk.