正压送风防烟系统设计参数的数值模拟

正压送风防烟的基本方法就是对建筑物的某些区域用机械方式送入足够的新鲜空气，使其维持高于建筑物其它区域一定的压力，从而把其他区域的火灾烟气阻止于被加压区域之外。本文主要是针对正压送风系统参数选取为目的的，通过FLUENT进行数值模拟，从理论上得出合理的设计参数，更好地将火灾烟气阻止于被加压区域之外。由于被加压区域往往是疏散通道，如楼梯间、前室等，在疏散过程中这些区域的门总是不断被打开的，因此，正压送风系统应当在关门、开门两种情况下都满足防烟的要求。根据以上的需要，分别进行研究。本文主要是针对房间的热源对气流组织的影响，为研究部分的。

Numerical Simulation of Design Parameters of Mechanical Air Supply System With Positive Pressure

Positive pressure mechanical air supply system against the smoke is the essential method which offers enough fresh air to building of certain regions in mechanical way and therefore resulting in its pressure to be higher than the building of other regions. Thus prevents other regions of fire hazes outside of the region of pressure. This article mainly alms at the goal of pararneter selection of the mechanical air supply system with positive pressure. Through numerical simulation with software FLUENT, we can theoretically obtain the reasonable design parameters, which can better prevent the fire haze into pressurized region. Because pressurized region often is dispersing channel, like the stair hall, the front room and so on. In the process of dispersing, these regions gates are always open, therefore, the positive pressure mechanical air supply system must satisfy the request whether the gate is open or not. According to the previously mentioned demands, we should investigate them separately. This article mainly alms at the effect of the heat source on the air distribution for research portion.