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在喷雾降尘设备中,喷嘴是一个关键部件,其能量损失的大小直接影响喷雾的效率。笔者基于流体力学理论,利用FLUENT软件对锥形和流线形喷嘴内流场进行了仿真,并对其能量损失进行了对比分析。结果表明,喷嘴的能量损失主要发生在入口处;锥形喷嘴的入口收缩角越小,喷嘴能量损失越小;一般情况下,流线形轮廓的喷嘴能量损失小于锥形喷嘴;维多辛斯基曲线喷嘴喷口处的压力分布较平稳,其能量损失小于余弦曲线喷嘴。
In the spray dust control equipment, the nozzle is a key component, the size of the energy loss directly affects the efficiency of the spray. Based on the theory of fluid mechanics, the author uses FLUENT software to simulate the flow field in conical and streamlined nozzles, and compares the energy loss. The results show that the energy loss of the nozzle mainly occurs at the entrance. The smaller the entrance angle of the cone nozzle is, the smaller the energy loss of the nozzle is. In general, the energy loss of the nozzle with streamlined profile is smaller than that of the conical nozzle. The pressure distribution at the base curve nozzle orifice is relatively stable, and the energy loss is less than that of the cosine curve nozzle.