A novel method for estimating droplet charge in numerical simulations of conductively and inductively charged sprays is presented. This method is based on balancing the effective electric field at the sprayer nozzle with the global electric field induced by the charged droplets. The global approach avoids the need for computationally expensive local resolution of the spray formation region, allowing it to be used in Eulerian–Lagrangian simulations of high-flowrate sprays. The method is validated against experimental data from literature, proving it can predict droplet charge with reasonable engineering accuracy, over a wide range of spray parameters, for conductive spray liquids.

提出了一种在导电和感应带电喷雾的数值模拟中估算液滴带电的新方法。该方法基于在喷雾器喷嘴处的有效电场与由带电液滴感应的全局电场之间的平衡。全局方法避免了对喷雾形成区域进行计算昂贵的局部分辨率的需要，从而使其可用于高流量喷雾的欧拉-拉格朗日模拟中。该方法已针对来自文献的实验数据进行了验证，证明了该方法可以在合理的工程精度下，在各种喷雾参数范围内预测导电性喷雾液体的液滴电荷。