INFLUENCE OF SPECIAL-PURPOSE AGENTS ADDED TO WATER ON THE LOCALIZATION AND SUPPRESSION OF THE COMBUSTION OF MATERIALS WITH IT

The heat transfer in the process of passage of droplets of fi re-extinguishing compounds through the high-temperature pyrolysis zone of combustible materials was investigated experimentally by optical diagnostics methods with the use of a program-apparatus complex for recording the sizes of droplets. The numerical and volume concentrations of droplets of fi re-extinguishing compounds based on water in a fi nely dispersed aerosol generated in three regimes were determined. The conditions of cessation of the fl ame combustion and thermal decomposition of a typical combustible material subjected to the action of water, a 5% foamer emulsion, a 10% bischofi te solution, and a 20% FR-Les-01 solution were recorded. The sizes of the droplets of the indicated fi re-extinguishing compounds and their fl ow rates necessary and suffi cient for the suppression of the fl ame combustion and thermal decomposition of typical forest combustible materials were determined.

Author:  G. V. Kuznetsov, N. P. Kopylov, A. O. Zhdanova, K. O. Ponomarev, A. S. Sviridenko
Keywords:  fi re extinguishing, evaporation, endothermal process, droplet, combustible materials, special-purpose additives, surface tension
Page:  1142