Experimental study on spray characteristics and fire suppression performance of pressure swirl nozzle

被引：0
|
作者：
Liu Z. [1 ,2 ]
Yu M. [2 ]
Zheng L. [2 ]
机构：
[1] School of Mechanical Engineering, Southwest Jiaotong University
[2] School of Safety Science and Engineering, Henan Polytechnic University
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2010年 / 45卷 / 02期
关键词：
Fire extinguishment; Measurement; Pressure swirl type nozzle; Spray characteristics; Water mist;
D O I：
10.3969/j.issn.0258-2724.2010.02.009
中图分类号：
学科分类号：
摘要：
A pressure swirl nozzle for water mist fire suppression was developed and experimentally studied to optimize the parameters of the nozzle. The influences of the design parameters, the operating pressure, and the additive to plain water on spray characteristics were also investigated. The results show that the Sauter mean diameter (SMD) of droplets was decreased by 8% when the operating pressure was increased from 0.5 to 1.5 MPa; and that adding additive in water could decrease the SMD by about 1.3% to 15%. What's more, the larger the SMD of mist droplets, the wider the range of droplet diameter distribution; and the trend that the volume fraction curve of droplet diameter shifts towards the large diameter direction was also found. The relationship between the mist velocity and the operating pressure was approximately a linear positive dependence. When the nozzle structure was not properly designed, the downstream distribution of the water mist flux would not be uniform, which is disadvantageous to fire suppression.
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页码：213 / 217
页数：4
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