INFLUENCE OF THE HIGHT OF THE ROOM ON THE DISTRIBUTION OF SMOKE DURING A FIRE: STUDY BY NUMERICAL MODELING

To ensure the safety of citizens and protected facilities, fire alarm systems are designed and installed in high-rise buildings. One of the key design factors is the nature of smoke propagation during a fire, which in turn is highly dependent on ceiling height. This study examines smoke propagation during a fire in high-rise buildings. The study's methodology includes numerical modeling of this process, which was performed using Fire Dynamic Simulation software, followed by data visualization in Smokeview. The data obtained indicate that at ceiling heights of 4 and 8 meters, vertical smoke accumulation occurs faster than horizontal smoke accumulation. Therefore, at these heights, traditional horizontal installation of linear smoke detectors is preferable. Above ceiling heights of 12 meters, vertical placement of linear smoke detectors is more advantageous. The identified characteristics can be useful both during the design and installation stages of fire alarm systems. As part of further research directions, it is advisable to study the process of smoke propagation with a smaller step in ceiling height and, based on the data obtained, make changes to the current regulatory documents governing the design of fire alarm systems.