Development of an experimental laboratory sample of foam extinguishing system using compressed air (CAFS)

  • A. Nikulin The Ukrainian Civil Protection Research Institute
  • A. Kodryk The Ukrainian Civil Protection Research Institute
  • O. Titenko The Ukrainian Civil Protection Research Institute
  • V. Prysiazhniuk The Ukrainian Civil Protection Research Institute
Keywords: compression foam, foam generator, adhesion, foam elasticity.

Abstract

The analysis of known structures of foam generating systems with compressed air, as well as the results of research on operational experiments, tests and research of systems carried out abroad, allowed to formulate basic principle requirements to technological and constructive parameters of foam generating systems with compressed air.

The general trend in the design of various structures, especially complex, built on the internal interaction of individual structural units – is the development of a mathematical model, preceding a constructive solution and often is the calculated basis for them. The created mathematical model of the process of foaming made it possible to determine the dependence of the quality of the foam obtained on the structural and technological parameters. On the basis of the developed mathematical model of foaming, a principal scheme of the process is proposed and a small-sized test facility is created for studying the possibilities of obtaining a compression foam according to the proposed scheme. The peculiarities of the work are an attempt to obtain compression foam according to the proposed scheme with the use of domestic general purpose foam generators using the modernized existing portable fire extinguishing equipment, which is at the disposal of fire units of Ukraine. Particular attention is paid to the analysis of development of small-sized mobile and portable plants, which can be used as an addition to existing fire-fighting equipment. During the experiments, the variables were the brands and concentrations of foam generators, the magnitude of air pressure in the system, and the ratio of water to air. The dependence of the quality of the foam on the change in pressure on the outlet nozzle was established, therefore, during each experiment it was controlled and maintained constant during its conduct. As a result of previous tests, the possibility of obtaining a compression foam according to the proposed scheme with the use of synthetic domestic general purpose foam generators with the use of existing fire equipment has been confirmed. The following are ways of developing work.

Published
2018-12-30