摘要：为了研究喷雾压力和环境气流速度对射流喷雾的雾化效果及喷雾雾场的均匀性的影响,基于流体力学理论,建立压力型喷嘴喷雾的数值计算模型,利用计算流体动力学软件Fluent对喷雾雾场进行气-液两相流数值模拟研究,并通过大量的数据统计定量分析雾滴粒径的分布情况。结果表明:在喷射压力一定时,风速越大雾滴飘移能力越强,风速过大或过小都将严重影响雾化雾场的均匀性;在一定范围内喷射压力越大,雾化效果越好,所形成的雾滴平均粒径越小。

关键词：气-液两相流；喷嘴雾化；喷雾雾场；雾滴粒径；数值模拟

Abstract： To study the effect of spray pressure and air velocity on the jet spray atomization and spray field uniformity, a numerical calculation model of pressure nozzle spraying was established based on the fluid mechanics theory. The computational fluid dynamics software Fluent was used to simulate the gas-liquid two phase flow field of jet spraying, and the distribution of droplet size was quantitatively analyzed by counting a lot of data. The results show that at fixed injection pressure, the greater the wind speed is, the stronger the drift ability of droplet is. The wind speed is too large or too small to seriously affect the uniformity of the atomized spray field. In a certain range, the bigger the injection pressure is, the better the atomization is, and the droplet mean diameter is smaller. 

Keywords: gas-liquid two phase flow; nozzle atomizing; spray field; droplet size; numerical simulation