全氟己酮灭火剂局部应用灭火技术研究

以全氟己酮灭火剂局部应用灭火技术为研究对象,基于旋芯喷嘴低压大流量雾化的特性,利用Fluent进行了该类喷嘴的外流场仿真,完成了雾化后的灭火剂浓度分布特性仿真分析,并确定了浓度分界点;结合吉利兰半经验公式,推导出了针对不同雾化半角的喷嘴流量计算公式,并建立了局部应用灭火计算方法;结合实验,验证了局部应用灭火技术方法的准...

Study on local application fire extinguishing technology of perfluoro-2-methyl-3-pentanone

Takingthe local application fire extinguishing technology of perfluoro- 2-methyl- 3-pentanone as the research object, based on the characteristics of low-pressureand large-flow atomization of the rotary core nozzle, used Fluent to carry out thesimulation of the external flow field of this nozzle, and completed thesimulation analysis of the distribution characteristics of atomized fireextinguishing agent, and determined concentration cut-off points. Combined withGilliland semi-empirical formula, derived the calculation formula of nozzleflow for different atomizing half angles, and established the calculationmethod of local application of fire extinguishing.Combined with the experiment,verified the accuracy of local application of fire extinguishing technology.The results show that higher height, larger atomizing half Angle, higher temperature,and smaller particle size all lead to the increase of the required fireextinguishing flow, among which the atomizing half angle has the greatestinfluence on the fire extinguishing flow. The local applied fire extinguishingcalculation method established by combining the concentration distributioncharacteristics and the calculation formula of nozzle flow can realize thereliable fire extinguishing.