基于DPM模型的感应式荷电雾滴群运动轨迹研究

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中图分类号：S491 文献标识码：A 文章编号：2095-5553（2026）02-0226-08

Abstract：Intheprocess offield plantprotection operation，the electrostaticapplicationtechnologycan efectively enhance theorbitchangemigrationabilityof droplet groups in thecropcanopyand increase theirdepositionratein theventral shelterof plants.Inthispaper，the target motioncharacteristicsofthecharged droplet grouparequantitativelyanalyzed by combining simulationand high-speed photography，which providesatheoretical referenceforthestudyof themotion characteristicsof thecharged droplet group，and thenprovides a scientific theoretical basisfor the designandoptimization ofplantprotectionelectrostaticsprinklers.Thecouplingsimulationmodelofairflow field，discretefogfieldand space electric field was establishedby using Fluent software，and the discrete-phaseparticle tracking method（DPM model）was used to simulatethe movement trajectoryof charged dropletgroups with diferent particle diametersandvelocities in the cropcanopy，and the acuracyof the simulation results wasverifiedby high-speedcameras，and finall the critical conditions and influencing factorsof theorbit change andmigration phenomenon of thecharged droplet groups were obtained.Theexperimentalresultsshowthatthetrajectoryofthechargeddropletgroupisafectedbythespatialposition， droplet diameter and velocity. In the simulation experiment，the charged droplets within 1.5cm from the plant，with a diameterof 86.78-183.16μm andavelocity oflessthan 2.4m/s aremorelikelyto becapturedbytheelectric fieldand adsorbed on the plant.In the indoor experiment，the charged droplets within 1.2cm from the plant，with a diameter of 160-240μm and avelocity of less than 3.2m/s are more likely to be captured by the electric field and adsorbed on the plant.Reducing the spray pressre can enhance the effct of the space electric field on the charged droplets，and improve theabilityofthechargeddropletstochangetheirorbits.Themotionlawofthechargeddropletgroupintheestablished multi-physics coupling simulation model is in good agreement with the experimental results.

Keywords： electrostatic spray; charged droplets；critical position;movement trajectory; droplet size

0 引言

在植保施药作业中，静电喷雾由于雾滴带电且在喷施过程中，靶标作物表面会感应生成异种电荷，在电场作用下增强荷电雾滴对靶运动，尤其是提升雾滴在靶标作物背面的吸附沉积效果；同时，药液在破裂成型的过程中受电场力、库仑力的影响，静电喷雾的雾滴更加细腻、均匀，在靶标作物上沉积效果更好[1]。（剩余10416字）