【摘要】 对频率20 kHz的超声波作用下竖直铝表面残留液滴的去除过程进行了快速可视化观测。对不同超声功率下铝表面液滴的去除时间进行了对比分析,同时对超声波作用下不同粒径液滴的去除时间进行了对比研究。试验结果表明,超声波可以瞬间去除竖直铝表面附着液滴且铝表面液滴去除过程可分为动力变形期以及破碎雾化期两个阶段。随着超声功率的增大,液滴的动力变形期变短,液滴越早进入破碎雾化期;此外,液滴粒径的增大使得液滴的动力变形时间以及破碎雾化时间均显著增加。结果验证了超声波去除铝板表面残留液滴的可行性,为有效去除表面残留液滴提供了可能。更多还原

【Abstract】 The detailed removal processes of residual water droplets from vertical aluminum surface with effects of 20 kHz ultrasonic vibration were visually observed.The removal time of water droplets under different ultrasonic powers was comparatively analyzed.In addition,comparative studies on the removal time of water droplets in different diameters were carried out.The experimental results indicate that the residual water droplets resting on vertical aluminum surface can be instantaneously removed by means of ultrasonic vibration.It is also found that the water droplets removal process on aluminum surface can be divided into two periods:the dynamic deformation period and atomization period.With the increase of the ultrasonic power,the time of dynamic deformation period will reduce,which leads to the appearance of atomization period ahead of time.Besides,both of the dynamic deformation and atomization time can significantly increase due to the increase of the water droplets diameter.The results verify the feasibility of residual water droplet removal from aluminum surface by ultrasonic vibration,which provides a possibility for residual water droplet removal from surface.更多还原