电磁驱动旋流下气泡运动行为的研究

将电磁搅拌技术应用到RH真空脱气装置上,结合模型实验和数值模拟研究了电磁驱动旋流下,RH系统上升管内气泡的运动行为.数学模拟和模型实验的结果都给出了旋流场内气泡分布与运动轨迹.气泡运动轨迹为螺旋线形,并在旋流作用下向管子中心处聚集.气泡聚集程度受旋流数影响.旋流还可以延长RH装置内非金属夹杂在RH系统内的停留时间和运动行程,大大增加非金属夹杂物与气泡碰撞、结合的机会,有利于夹杂物的去除.

Behavior of Argon Gas Bubbles in Swirlings Driven Electromagnetically

Applying electromagnetic stirring technique to RH vacuum degassing system,how the gas bubbles move in the swirlings driven electromagnetically in the ascending pipe of RH system is investigated combining water modeling experiment with numerical simulation.Both the experiment and simulation results reveal that the gas bubbles are distributed in swirling field and bubbles' motional path presents spiral,and that the bubbles come together at the center of the pipe under the influence of swirlings.In addition,the swirlings prolong the staying time of non-metallic inclusions in RH system and then extend their motional paths,thus providing more chances for non-metallic inclusions to collide or combine with gas bubbles so as to benefit the removal of inclusions.