消防水幕用扇形喷嘴的雾化特性研究

Study on the Atomization Characteristics of Fan Nozzles for Water Spray Curtain

为了分析消防水幕用扇形喷嘴的雾化特性,本文使用Fluent软件中的DPM模型对扇形喷嘴的雾化特性进行了仿真分析。研究结果显示,喷嘴工作压力越大二次雾化过程越长,喷雾过程中平均粒径呈现先减小再增大的趋势;喷雾过程中粒径与速度呈规律性分布,粒子速度呈指数衰减,相对小的粒径粒子衰减速度更快,粒子空间停留时间更长,这对水幕的隔热性能有很大意义。

In order to analyze the atomization characteristics of flat fan nozzles using for water spray curtain, the DPM model was used for simulation. The results showed a longer atomization process with more pressure. The mean diameter of droplets decreased first, then increased. The velocity of droplets attenuated according with exponential decay model. Relatively small particles had faster velocity attenuation and more residential time that is important for heat shielding ability of spray curtain.