JUSTIFICATION OF THE CRITERIA OF SPEED AND WIND DIRECTION AS PREREQUISITES FOR THE SPREAD OF FIRE TO NEIGHBORING OBJECTS

Abstract

The article briefly analyzes the current state of the impact of environmental conditions, including wind on the spread of fire to neighboring sites. The existing theoretical and experimental methods for predicting the spread of fire to neighboring objects are analyzed, and it is established that they need improvement in terms of taking into account the strength and direction of the wind. The main criteria and parameters that affect the forecasting of the spread of fire to neighboring objects among them heat flux density, flame temperature, ignition temperature of substances and materials irradiated from the fire torch, the critical surface heat flux density for substances and materials irradiated from the fire torch, the heat-generating capacity of the fire load, the duration of thermal radiation and the speed and direction of the wind. It is noted that the criterion of wind speed and direction is not fully investigated, which was the purpose of this work. The concept of wind, its characteristics and classification are defined.

With the help of the weather information server in Ukraine, the most typical wind speeds for the territory of Ukraine were studied and determined. The average values of wind speed are determined, substantiating the most probable intervals of the wind influence criterion, namely its speed, on the territory of Ukraine, which range from 0 m / s to 10 m / s, which will be used to study the influence of wind on propagation processes. fires at neighboring facilities.Keywords: heat flux, critical surface heat flux density, heat transfer, radiant heat exchange, wind influence.