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基于显微高数数码摄像技术对异性荷电液滴对撞行为的演变过程进行了实验研究。以不同离子浓度的盐酸水溶液为研究介质,精确捕捉了不同电压下异性荷电液滴的非聚合破碎形貌特征,探讨了介质电导率等对异性荷电液滴非聚合及破碎特性的影响规律。实验结果表明:低电导率液滴在较高电压下的动力学行为表现为非接触反弹。随着电导率的增加,液滴对撞过程的动力学行为表现为非接触破碎,液滴尖端的离子浓度在发生空气放电前达到瑞利极限。液滴破碎行为的剧烈程度与液体电导率成正比,高电导率液体在较低的电压区间便观察到液滴的破碎行为,且液滴拉伸速率及破碎体积对电场强度的变化更加敏感。
Based on the microscopic high digital camera technology, the evolution of the collision of opposite-sex charged droplets was experimentally studied. Different concentrations of hydrochloric acid aqueous solution as the research medium accurately captures the heterogeneous charged droplets under different voltage non-polymer crushing morphology, discusses the dielectric conductivity and other non-condensing charged droplets non-polymerization and crushing characteristics of the law . The experimental results show that the dynamic behavior of low conductivity droplets at non-contact rebound appears at higher voltage. With the increase of conductivity, the dynamic behavior of the droplet collision process is shown as non-contact broken, and the ion concentration at the tip of the droplet reaches the Rayleigh limit before the air discharge occurs. The degree of droplet crushing is proportional to the liquid conductivity, and the droplet crushing behavior is observed in high conductivity liquid at lower voltage range. The droplet tensile rate and crushing volume are more sensitive to the change of electric field intensity.