诱导排烟系统应用于地下车库的实验研究

Experimental study on the application of impulse exhaust system in underground car park

运用实验研究的方法分析了诱导排烟系统在地下车库中应用的可行性,研究了布置方式、诱导风速等敏感参数对排烟效果的影响,主要分析了火源上游不同位置处温度的变化。结果表明,诱导排烟系统能有效地抑制烟气向上游的逆流并能加强烟气的热对流,降低上游烟气的温度;另外,开启少于均匀布置诱导风机数目下,菱形布置诱导风机下的排烟效果优于均匀排列布置;在实验风速范围内,诱导排烟系统对上游烟气的控制和降温能力随着诱导风速的增加而提高,同时,在火源功率一定的条件下,增大诱导风速对控烟效果的改善存在临界值。

Experimental study has been carried out to investigate the feasibility of the use of impulse ventilation system for smoke control in underground car park. The impact of the parameters such as arrangement and impulse velocity on the exhaust effect was analyzed. The results have shown that the well designed impulse exhaust system is capable of preventing the flow of smoke to upstream and cooling the smoke. Moreover, diamond-shaped arrangement of impulse fans can control the smoke better than uniform array layout. The exhaust effect increases when the impulse velocity is increased, meanwhile, under any specific heat release rate, there would be an extreme value for impulse velocity to improve the smoke control effect.