Research On Smoke Flow Characteristics Of Fire In Multi-storey Building Of Corridor-style Based On Numerical Simulation

Corridor-style multi-storey building has become a kind of structural form used widely, such as college students'dormitory, guest houses and other buildings, mostly are Corridor-style multi-storey buildings. As these buildings have some features about multi-storey, functional complex, manpower-intensive, multi-fire load and long- narrow corridors, the fire risk is high. In particular, a large number of heat smoke generated when a fire, smoke is toxic and harmful ingredients is most important cause of fire injuries. Therefore, the fire study concluding concentration of smoke components, flue gas flow characteristics, smoke control in a corridor-style multi-storey building, have important practical significance and necessity to reduce fire casualties and property losses.Through the analysis and selection on a variety of fire models and software, the FDS was used in this article. The applicability and credibility of FDS have been verified numerous instances, and the FDS have been widely used in the construction of fire areas. In this paper the main content was to simulate and analyze the fire process by use of LES method for a typical Corridor-style multi-storey building—a full-scale university students dormitory. To simulate and study the spread manner of fire smoke Corridor-style multi-storey buildings comprehensively and systematically, the papers focused on the analysis of the following aspects:single-room fire; to study the whole fire smoke spread situation inside the building when the middle of the room fire in the first floor; to study migration characteristics of fire smoke in the different spaces of aisle when different fire-power and different location appear; to study the impact of fire floor on the upper and lower floors. The distribution of the concentration of major components within the flue gas, oxygen concentration, temperature, visibility, and the height of smoke layer was simulated and studied. The results are as follows:when single-room fire, due to the larger fire, even if the rapped officers hide in the balcony to refuge, their body and mind are also facing a great threat. Then as the fire smoke spread to the long-distance in the passage, the smoke layer declined even faster the height of about 1.7 meters at the lower space, which further explained the main reason about victims suffocate in remote distance reported extensively. The smoke screen has a greater impact on fire distribution in the upper space. The stack effect in a greater impact on fire distribution in the upper space. The stack effect in a corridor-style multi-storey building chimney is not obvious. When only a single-room fire doesn't expand, the fire has greater impact on the upper, but it almost doesn't effect the below floors. The results of this article can provide an important theoretical basis for corridor-style multi-storey building fire smoke control, personnel evacuation timely and safely and fire rescue work.