The generation of external flames from windows, which plays a important role in upper floor fire spread, depends on the fire behavior in the compartment. Small scale fire tests using methanol, PMMA and wood as the fuels were conducted to investigate into the effect of fuel conditions on burning rate and generation of external flames. The measurement of the temperature, the burning rate and the heat release rare, and the observation of emergence of the external flames were conducted for different fuel and ventilation conditions. It is found that the burning rate obtained by Kawagoe et al. for ventilation controlled period of crib fire holds regardless of the type of the fuels tested in this study and that the criteria established based on stoichiometric air/fuel ratio and ventilation factor may be used for assessing the emergence of the external flames.
Showing promise complex of mathematical models to predict the dynamics of fire formations in the open atmosphere is represented and approved based on generalized set of equations for non-stationary two-dimensional turbulent movement of viscous compressible gas with taking into account combustion processes. The dynamics of fire formations such as open flames, fire balls and fire whirls is numerically investigated. Such phenomenon as fire storm that arises in major fires is numerically realized for the first time.
The prevention of fire accidents in storage and processing enterprises may be provided by quick detection of fire locations in vegetable raw materials storehouses. It is reached by optimization of location scheme for temperature detectors in vegetable raw materials bulks and by means of gas analysis and detection of composition and amount of gases. that give off during destruction of vegetable raw material. If ignition in vegetable raw materials storehouses is possible, the combined method of fire suppression is effective with use of the equipment for dilution of flammable gas-air m tures and discharge of storehouses.
Necessity of development of domestic variant Sub Surface Injection method extinguishing of fires of petroleum in tanks is shown. Main stages of process extinguishing of fires in the tanks Sub Surface Injection method by a way are analyzed. Results of Laboratory and natural tests Sub Surface Injection method extinguishing with application domestic foam bilding analysis.
The problem of defining the conditions of spontaneous combustion of powdered materials under oxidation for reaction of v-order and a wide range of heat and mass exchange parameters has been solved in this paper. The mathematical model tested on the laboratory apparatus and the test rig allows to calculate and to predict the behaviour of bulk powdered porous stuff of any dimensions and shape during its processing, transportation or storage.