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

中图分类号：TQ021.1        文献标志码：A

文章编号：1008-5548(2015)02-0005-05

DOI:10.13732/j.issn.1008-5548.2015.02.002

收稿日期：2014-06-23， 修回日期：2014-07-05，在线出版时间：2015-04-17。

基金项目：国家自然科学基金联合基金项目，编号：U1261107；山西省自然科学基金基础研究计划项目，编号：2012011018-1。

第一作者简介：梁钦（1987—），男，硕士研究生，研究方向为机电液一体化。E-mail:liangqin5257@163.com。

通信作者简介：高贵军（1973—），男，博士研究生，副教授，研究方向为机电液一体化。 E-mail: gaogj161@163.com。