大空间建筑火灾机械排烟的初步研究

文章分析了大空间建筑内机械排烟的要求，并在大空间火灾实验厅内进行了不同火源功率下的机械排烟试验，结果表明，在大空间火灾中生成的烟气温度比较低，很容易发生沉降及与空气混合，机械排烟造成空气与烟气的混合，主要是通过逐渐稀释来源除烟气的。在进行机械烟时还应考虑风机对流场的扰动、补风口位置的影响。

Preliminary Study on the Mechanical Exhaust in the Large Space Building

The paper analyses the requirements for mechanical exhaust tests under different power done in the large space fire test hall. The result shows that the temperature of the smoke generator from the fire in the large space building is rather low, and the smoke subsides easily and mingles with air. The mechanical exhaust can bring the smoke and air together and get rid of the smoke through the dilution of it gradually. The effect of the turbulence of the fan convection field and the position of the wind compensating vent should be considered when doing mechanical smoke exhaust.