CURRENT STATE OF THE PROBLEM OF EVALUATING THE INFLUENCE OF THE HORIZONTAL OPENINGS IN THE SEPARATING STRUCTURES ON THE FIRE TEMPERATURE IN THE COMPARTMENT

Abstract

The paper is devoted to analysis of experimental study and evaluation of the influence of the horizontal opening on the temperature of the fire in the compartment. The limitations of the previous scientific results in modeling fires are shown in compartment having both vertical and horizontal openings. An analysis of literature sources and modeling of wood burning in an administrative compartment for evaluating the influence of the horizontal opening on the temperature of the fire in the compartment. The conclusions on the results of the analysis were developed. The article analyzes the literature on the effect of horizontal openings on the temperature of the fire in the compartment. Limitations on the use of previously obtained research results in simulation of fires in compartment having both horizontal and vertical openings are shown. To analyze the difference in fire temperature in the compartment Fire Dynamic Simulator has been used. For a preliminary assessment of the effect of horizontal openings on the temperature regime of a fire in the room, modeling of wood burning in an administrative compartment was carried out for the case of the presence of only a vertical opening. Then, modeling was carried out for the same administrative compartment, but it had an additional horizontal opening. Based on the results of the simulation, a significant effect of horizontal apertures on the temperature regime of a fire in the room and the absence of techniques allowing to sufficiently assess the effect of openings in horizontal enclosing structures on the integral thermal and technical parameters of a voluminous freedeveloping fire in a room is established. A significant effect of ventilation through horizontal openings on the fire temperature is detected. Modification of the algorithm used in the development of the calculation methodology is suggested. The results can be applied in calculating the compartment fire temperature taking into account the horizontal openings. Horizontal openings have a significant influence on the fire temperature and should not be ignored during the calculation. It is necessary to revise the calculation algorithm used in the STB 11.05.03 methodology.