Study On The Flow Law Of The Fire Smoke Of The Atrium Buildings And Its Numerical Simulation

With the high speed development of economy and the increase in urban population, in recent years, the world built a large number of kinds of large buildings. Because of the diversity functions of these buildings making the buildings have many and complex burnable things, meantime the buildings generally can accommodate larger density of population, making personnel evacuate to safety place needed for long time under various and multifarious channels. So once fire, that will cause the fire spread quickly even extremely easily cause larger losses and casualties. Therefore, it is particularly important for people to study the smoke flow law of building fires.Fluent has been used to calculate the smoke movement in this paper, and the effect of fire size, fire position, atrium shape coefficients and smoke technology on the development of fire smoke have been simulated and analyzed by the program respectively. At the same time, we probe into the law of the fire smokes flow, namely: the settling rate of smoke is very quickly, and the time required to fill an atrium with smoke is very short, but smoke temperate is not high; the fire loads and the mechanical exhaust are the important factors affecting the stability of the smoke layer.This paper taking San-wei commercial plaza of Jiaozuo for example calculation, a design conception is put forward to optimize the volume of smoke exhaustion; and improve ideas of separating from the storey conjoint as soon as fire breaks out, it is necessary to set reliable fire partition between the atrium and vicinity storey; there is a suggestion that floors of not catching fire around the atrium, egress aisles and smoke-proof staircases keep positive pressure to the atrium in preventing smoke.