一种旋流式喷嘴的雾化实验研究

Atomization experimental research of a swirl nozzle

细水雾喷嘴是细水雾灭火系统的关键部件。本文主要采用激光多普勒测试仪(LDV)和相位多普勒粒子测量仪(PDPA)对一种旋流式喷嘴进行雾化实验研究。通过实验得到了不同测试压力下,喷嘴的流量、流量特性系数K、雾化锥角θ、水平射程、索特尔平均粒径(SMD)和粒子轴向速度的分布情况,最后得到了这几个参数随测试压力的变化关系。所测试的细水雾灭火喷头具有较大的轴向动量和径向动量,有利于扑灭深位火灾和扩大灭火范围。

Water mist nozzle is the key component of water mist fire extinguishing system.In this paper,laser Doppler tester(LDV)and phase Doppler particle tester(PDPA)are used to study the atomization experiment of a swirling nozzle.The dis-tribution of nozzle flow rate,flow characteristic coefficient K,atomization cone angleθ,horizontal range,average particle size(SMD)and axial velocity of particles under different test pres-sures were obtained by experiments.Finally,the relationship of these parameters with test pressure was obtained.The water mist sprinkler in this work has large axial and radial momen-tum,which is beneficial to extinguishing deep fire and expand-ing the fire extinguishing range.