Mikhaylov D. The increase of the automatic fire-prevention protection efficiency of ventilated premises

The dissertation is devoted to the increase of automatic fire-prevention protection efficiency of ventilated premises by elaboration and introduction means of the support computer system of making decisions taking into consideration the influence of ventilation air streams parametres on the change of temperature fields in them. The complex of theoretical and experimental researches on the increase of fire suppression automatic system application efficiency (ASFS) premises taking into account the presence of ventilation streams, space-planning characteristics, possible sources of ignition, quantity and features of placing fire load has been carried out. The results of the theoretical researches of physical processes proceeding in the period of fire development inside with the presence of ventilation streams have been general-ized; their regularities, influence of various factors on fire dynamics have been re-vealed. The use necessity of the ventilation streams interaction with сonvective torrents from the source of burning of three-dimensional field models in the process of mathematical modeling has been grounded. The complex mathematical model, allowing to define existential characteristics of the environment indoors has been developed. As distinct from the known models it uses Reynolds' and Relej's criteria and the factor of energy ventilation ratio and сonvective thermal streams that has allowed to reproduce the dynamics of parametres of premise's gas environment more precisely; to define zones with the sharp increase of temperatures. The mathematical model and structural diagram СIS for designing ASFS in the course of indistinct initial information about a temperature field and parametres of a ventilation stream have been developed by means of a system analysis method. The model of permissible alternatives set formation , a complex function of a choice for the acceptance of rational decisions while designing ASFS and algorithms for the decision of indistinct choice mathematical problem, programme code and interface have been elaborated. Recommendations on designing fire-prevention protection of premises with the presence of ventilation streams have been developed and put into practice. Keywords: a ventilation stream, gas environment, temperature field, modelling, making decision support system, designing.