The Design And Research On Water Spray Nozzle For Forest Fire-extinguishing

Water mist is a concept against water spray,which refers to water particle by means of spaying water in a high pressure condition using special nozzle.The previous studies were mainly about the application of water mist fire-extinguishing technology to the city but seldom to the forest fire.This study is mainly on the design of the secondary nozzle which produces the water mist to extinguish the forest fire.Firstly,it obtained the theoretical water mist parameter through the optimizing the structure and modeling water mist experiment by employing Fluent software.Based on this parameter,this thesis discussed the processing of nozzle.Secondly,the author got the water mist parameter by water mist producing experiment,data collection and analysis of the atomization function of the nozzle.Finally,it comes to the conclusion that the water spray effect of the secondary nozzle is significant and the degree of homogeneity DR is larger than 0.67.Meanwhile,this study conducted the effectiveness fire-extinguishing experiment using the secondary water mist nozzle for the ground fire of forest fire.By the comparison of the experiment result,it indicates that the fire-extinguishing and atomization effects of the nozzle with the diameter of 1mm are significant under the experiment state.