Numerical Simulation of Outdoor Wind Influence on Smoke Movement
This paper analyzes the characteristics of smoke movement under the influence of outdoor wind by Numeri-cal Simulation in order to provide theoretical basis for firefighting and rescue of high-rise buildings.Full-scale FDS model of the floor on fire with different velocity of outdoor wind is built to simulate and analyze smoke movement properties.The results show that:the peak heat release rate of the scenario with a wind speed of 6.5 m·s-1 is about 1.6 times that of the windless condition.When the outdoor wind speed is greater than 10 m·s-1,the heat release rate decreases with the increase of the wind speed.After the outdoor wind enters the room on fire,the temperature,vis-ibility,smoke layer height,and fluid velocity of various areas of the fire floor are significantly different from the windless condition.In this situation,it is necessary to take such countermeasures as optimizing the smoke control system performance,conducting thorough investigation and assessment,employing facilities with precision,and selecting equipment flexibly to ensure the safety of firefighting and rescue operations.
firefightingoutdoor windsmokenumerical simulationfirefighting and rescue
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