贮木场火灾细水雾喷头结构改进与CFD仿真  

Structural Improvement of Water Mist Nozzles for Log Yard and CFD Simulation

作　　者：辛颖[1] 秦奋起 李耀翔[1] 邢涛[1] 冯国红[1] 侯卫萍[1] 杨铁滨[1] 方海峰[1] 

机构地区：[1]东北林业大学工程技术学院,哈尔滨150040

出　　处：《森林工程》2014年第3期63-67,共5页Forest Engineering

基　　金：中央高校基本科研业务费专项资金项目(DL12BB14);黑龙江省教育厅科学研究项目(12513025)

摘　　要：以细水雾灭火技术应用于贮木场火灾为背景,针对常见的压力式单回路细水雾喷头进行结构改进,采用Fluent软件进行仿真与模拟,选取最优的第二级雾化机构的孔径大小,通过对比压力云图、速度云图和密度云图评定喷头性能。模拟结果表明:在相同的条件下,增加二级雾化机构的喷头可以在射程、雾粒的均匀度方面提高细水雾质量,使细水雾更好地适应贮木场火灾的特点,提高其灭火效率。Based on the application of water mist for logyard,the structure improvement of the single-loop pressure water mist nozzle was realized,and the optimal size of the mechanical structure was determined by simulation using Flent software. Performance of the nozzle was assessed through simulated pressure image,velocity image,and density image. It was shown that under the same conditions two stage atomization mechanism of the nozzle could improve the quality of water mist in uniformity range and uniformity of spray particle. Therefore,the mist fits the characteristics of log yard＇s fire and can improve firefighting efficiency.

关 键 词：细水雾 贮木场 灭火 CFD仿真 

分 类 号：S782.3[农业科学—木材科学与技术]