【摘要】 对铝合金旋转脉冲精炼过程的气泡运动规律进行了研究,采用VOF模型及数值模拟方法模拟了气泡在液体中的运动行为,研究了液相物性对气泡形成以及上升过程的影响。结果表明,气泡经历了形核与长大过程,气泡形核初期呈现球状,在随后的脱离和长大过程中,气泡的形状发生改变,从球状变为椭球状。随着粘度增加,气泡的形状趋近于球状,运行轨迹从曲线趋近于直线。随着表面张力增大,气泡越来越难以变形,气泡开始破碎的时间推迟,甚至不发生破碎。更多还原

【Abstract】 The bubbles movement during refining process of aluminum alloy by rotary pulse ventilation was analyzed,and the motion behavior of bubbles in the liquid was simulated by using the numerical simulation with the model of VOF to analyze the effects of liquid properties on the bubbles formation and ascending process.The results show that the bubbles experience nucleation and growth process.The bubbles exhibit spherical structure at the initial stage of nucleation,and the shape of the bubbles is changed from spherical to ellipsoidal during the subsequent process of detachment and growth.With the increase of viscosity,the shape of the bubbles tends to be spherical,and the curvature running track tends to be straight line.Meanwhile,with the increase of surface tension,the bubbles are increasingly difficult to be deformed,leading to the bubble collapsed later,even not broken.更多还原