The Small-scale Research On The Fire Control Influenced By The Key Paramaters Of Water Jet Extinguishing The Fire

Nowadays, fire becomes so severe and seriously.The security of human being and wealth were threatened by the horrible fire. As the halon extinguisher does pollution to the environment, so people pay more and more attention to water extinguisher. As a fire extinguishing system, water jet stream is one of the water extinguishers, to strengthen the study of which is helpful and property more effectively.Based on many research literatures on big fire in history, the distribution of jer stream technology and its development in extinguisher, basic theory of water jet stream and mechanism of water jet stream for extinguishing system, the key parameter of the incidentplane of water jet stream for fire-contiolling strategies are studied and analyzed by combining the research methods of theoretical analysis and the experimental measurement. The main research contents and achievements in the paper are as follows:(1)A comprehensive analysis and statistics on the losses of lives and property of several major fires in recent years at home and abrord and the development as well as the application on fire of jet stream was made.(2)Through the small scale experiments that to what extent the water jet trajectory controlling flames and fire opposite,finding that changes of water jet trajectory has some effect on the fire extinguish,but this was not significant.Namely,regardless that water jet trajectory is parabola or linear motion,fire extinguishing nearly keeps no significant different time.(3)Through the small scale experiments that to what extent different ways of water jet incident controlling flames and fire opposite, finding that different ways of water jet incident has significantly different extinguishing effects. Of which fire extinguishing needs the shortest time if water jet incident starts from the center of fire, and needs the longest time if water jet incident starts from the sdge position of fire.(4)Through the small scale experiment that to what extent NaCl water jet stream controlling fire plane, finding that the effect of fire extinguishing depends on largely on adding mediator or not, of which NaCl water jet stream needs the shortest fire extinguish time and the pure water jet steam needs the longest fire extinguish time.The conclusion is that water with sodium chloride is better than the pure one.