中文摘要：

为了描述喷雾液的动态表面张力与雾滴粒径的关系，用粒度分析仪对不同表面张力喷雾液喷雾时形成的雾滴体积中径D50进行了研究，重点考察了喷头尺寸、喷雾压力对D50的影响。结果表明：喷雾液0．023s时的动态表面张力值γ0．023越低，所形成的雾滴D50越小，D50与γ0．023呈线性相关；喷雾压力相同时，随着喷头尺寸的增大。喷雾液动态表面张力的改变对雾滴粒径的影响增大；喷头尺寸相同时，随着喷雾压力的增大，喷雾液动态表面张力的改变对雾滴粒径的影响减小。

英文摘要：

In order to study the relationship between the atomization properties and dynamic surtace tension （DST） of pesticide surfactants aqueous solutions, the median volume diameter （D50） of agriculture flat-fan nozzle were measured, with the particular emphasis on the effects of different nozzles and pressures. The results showed that the D50 was correlated linearly with γ0.023; the Dso increased resulted from DST with the increase of the nozzle type under the same pressure; with the increase of the pressure, the D50 decreased for the same nozzle.